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Search results “Physical acoustics principles and methods”
Audio Concepts 103: Acoustics - 10. The Sweet Spot Near-Field Monitoring
 
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Additional videos for this title: http://j.mp/1pCUOyx Audio Concepts 103: Acoustics by Joe Albano Video 10 of 12 for Audio Concepts 103: Acoustics How we hear sound is greatly influenced by where we are physically in relationship to where the sound emanates from. Understanding how sound is shaped, colored and transformed by the listening environment is essential knowledge when designing a studio and recreating acoustical phenomena in sound design and mixing. In this course, you learn all about the wavelength, absorption, reflection, transmission of sound in the real world. You also learn all about phase, polarity and interference and how these physical properties determine why sound sounds the way it does! From there, expert engineer Joe Albano dives into phenomena like Comb Filtering, the Haas Effect, Standing Waves and other phenomena that can impact direct and reflected sound. The final two sections in this course zoom in on Room Treatment and Sound Proofing - essential knowledge for anyone designing or modifying a listening space or designing their own studio. Learn everything about sound and audio in our deep, multi-part Audio Concepts series! More info on this title: http://j.mp/1pCUOyx
Views: 13833 macProVideoDotCom
FOERSTER: EMAT method – principle of operation
 
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The EMAT-Method (Electro Magnetic Acoustic Transducer) is a technology where ultrasound is created and received electro-dynamically directly in the test material, which means no coupling agent is required. The principle is described in the video. The CIRCOSON WT by FOERSTER operates on the basis of the EMAT principle and allows a highly accurate wall thickness measurement and lamination testing of ferromagnetic seamless steel tubes. Further information on the CIRCOSON WT can be found at: https://www.foerstergroup.de/en/deu/products/circoson-product-family/
DAFx17 Tutorial 2: Brian Hamilton - Simulation of Room Acoustics
 
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Presented at the 20th International Conference on Digital Audio Effects (DAFx17) Tuesday 5th September 2017, Edinburgh http://dafx17.eca.ed.ac.uk/ Tutorial Abstract: Simulation of room acoustics has applications in architectural acoustics, audio engineering, video games; also it is gaining importance in virtual reality applications, where realistic 3D sound rendering plays an integral part in creating a sense of immersion within a virtual space. This tutorial will give an overview of room acoustic simulation methods, ranging from traditional approaches based on principles of geometrical and statistical acoustics, to numerical methods that solve the wave equation in three spatial dimensions, including recent developments of finite difference time domain (FDTD) methods resulting from the recently completed five-year NESS project (www.ness-music.eu). Computational costs and practical considerations will be discussed, along with the benefits and limitations of these frameworks. Simulation techniques will be illustrated through animations and sound examples. Speaker Bio: Brian Hamilton is a Postdoctoral Research Fellow in the Acoustics and Audio group at the University of Edinburgh. His research focusses on numerical methods for large-scale 3-D room acoustics simulations and spatial audio. He received B.Eng. (Hons) and M.Eng. degrees in Electrical Engineering from McGill University in Montréal, QC, Canada, in 2009 and 2012, respectively, and his Ph.D. from the University of Edinburgh in 2016.
Views: 975 AAG Edinburgh
Synthesis and Realism (Physical Modeling and Additive)
 
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For higher quality (free) videos please visit Sormena.org. In section 1 we discussed sampling and samplers. Unless you apply some form of stretching or repitching the sample is what it is. You download a recording of a piano and when you click play you hear a piano. That’s great but what if you don't like that piano and would prefer a different model or one recorded in a dry room versus a wet concert hall. You're out of luck with that sample. This week is all about alternative synthesis methods that strive for realism and then eventually depart from it (extreme sample manipulation). We’ll begin with physical modeling. The principle is that algorithms, instead of samples, model the actual acoustic traits that make an instrument sound the way it sounds. For example you could use a physical model to approximate the sound of a bow dragging across a tensioned string. By the end of this week we will be using samples as the source for experimental resampling/synthesis techniques including wave scan and granular.
Views: 2136 Sormena Project
Ideal Acoustic Diffuser Placement Guide - www.AcousticFields.com
 
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Want to know how to position a sound diffuser in your room? In today's video I'm going to show you how to position your sound diffusers based on the type of room you have. Your room usage is key to this. Where you position diffusers in a control room is totally different to a critical listening room which again is different to a home theater. So in today's video you'll learn: 1. Where to position your diffusers in your control room and the diffusion sequence you'll need, 2. What diffusion does on the front and rear wall in a critical listening room and, 3. How to position your diffusers in a home theater. So enjoy the video and let me know if you have any follow up questions. Thanks Dennis, P.S. To learn more about room acoustics, please sign up for my FREE private room acoustic training videos and ebook at http://www.acousticfields.com/free-ebook
Views: 35805 Acoustic Fields
The most accurate temperature measurements ever made. Probably.
 
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It is now 25 years since the establishment of the International Temperature Scale of 1990. The scale has been extremely successful in enabling accurate and consistent temperature measurement around the world. However, it has become clear that the thermodynamic temperature estimates on which ITS-90 is based were in error, even at temperatures close to the triple point of water. The discovery and elucidation of this error is largely due to the development of acoustic thermometry. Over the last decade, the development of combined microwave and acoustic resonators for the measurement of the Boltzmann constant has improved the state-of-the-art significantly and resulted in advances in theory, fabrication, and experimental techniques. After reviewing some of these advances, we present new data on T – T90 at twenty temperatures in the range from 118 K to 303 K. The differences agree well with other recent estimates, but our low uncertainty reveals previously unseen detail. These measurements probably constitute the most accurate measurements of temperature ever achieved.
Sound: Crash Course Physics #18
 
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Get Your Crash Course Physics Mug here: https://store.dftba.com/products/crashcourse-physics-mug We learn a lot about our surroundings thanks to sound. But... what is it exactly? Sound, that is. What is sound? And how does it travel? And what is this Doppler Effect that we've heard so much about? In this episode of Crash Course Physics, Shini goes over some of the basics (and some of the not so basics) of the Physics of Sound. -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 727441 CrashCourse
EMAT_Electromagnetic Acoustic Transducers
 
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Electromagnetic Acoustic Transducers, unlike conventional UT Transducers, create Ultrasonic energy through inducing an alternating current within a magnetic field. EMAT, as it is commonly referred to in our industry, is the application of EMAT transducers to a scanner for the purpose of pipe screening. http://petrochemintl.com/industry/petrochem/nondestructivetestingservices/emat.cfm
Views: 8578 TUVPetroChem
ACOUSTIC DESIGN CONSIDERATIONS
 
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ACOUSTIC DESIGN CONSIDERATIONS Module Contents: General design considerations Demonstration
Salford Acoustics Interview
 
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This is a video of an interview of two Professors. Professor Bruno Fazenda is a tutor at the Salford Univeristy and is involved with multiple projects and Professor Trevor Cox who has been on TV multiple times and also teaches a little at the Salford Univeristy, I interviewed them about Salford Acoustics and how it started and what sort of work they do. If you are interested in sound then this will be an interesting watch. Created by Brandon Denny, Josh & Joanne 2018.
Ultrasound medical imaging | Mechanical waves and sound | Physics | Khan Academy
 
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You can actually use sound to create images of the inside of the body. Wild! Created by David SantoPietro. Watch the next lesson: https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/standing-waves/v/standing-waves-in-tubes-part-1?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/sound-topic/v/why-do-sounds-get-softer?utm_source=YT&utm_medium=Desc&utm_campaign=physics Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 184899 khanacademymedicine
test AE
 
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The research of the weakest sections of steel structures using acoustic emission method. To receive data the SAMOS AE system of the Physical Acoustics Corporation (Mistras Holdings Company, USA) was used.
Views: 1361 Dmitriy Zhitenev
SIGGRAPH 2016 Course: Physically Based Sound for Computer Animation and Virtual Environments
 
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Code on Github: https://github.com/dingzeyuli/ModalSound Physically Based Sound for Computer Animation and Virtual Environments ACM SIGGRAPH 2016 Course Doug L. James, Timothy R. Langlois, Ravish Mehra, Changxi Zheng http://graphics.stanford.edu/courses/sound/ https://dl.acm.org/citation.cfm?id=2927375 Course Description Physically based sound is an important emerging approach to computer synthesis of realistic synchronized sounds for physically based animation and real-time virtual environments. A major challenge for learning and implementing these sound techniques is the wide range of physically based models and sound phenomena involved, as well as the need for optimizations. Many publications on physically based animation and sound rendering assume mathematical background that many in the graphics community lack. The result is that learning physics-based sound techniques is unnecessarily difficult for many interested students and practitioners. The main goal of this course is to make the principles and methods of physically based sound accessible to a broader computer-graphics audience. The course covers sound-source models for sonifying important phenomena from physics-based animation: rigid bodies, brittle fracture, thin-shells, cloth, deformable collisions and contact, fluids, and fire. Material related to rigid-body sound is covered in greater detail in the first half of the course, which addresses fundamental topics such as modeling modal vibrations and sound radiation from surfaces. Further readings are suggested throughout the course notes. Several recent SIGGRAPH papers also serve as supplemental notes for more advanced topics. With supporting software and implementation short-cuts, attendees can start using physically based sound immediately after completing the course.
Views: 7641 Dingzeyu Li
6. Holographic Principle
 
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MIT 8.821 String Theory and Holographic Duality, Fall 2014 View the complete course: http://ocw.mit.edu/8-821F14 Instructor: Hong Liu In the first part of this lecture, Prof. Liu explains physical motivation behind the holographic principle, and a formulation of the principle. In the second part, he starts a new topic on the large N limit of a non-Abelian gauge theory. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 7492 MIT OpenCourseWare
Acoustic Impedance: Ultrasonic Testing Acoustic Impedance
 
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https://www.udemy.com/ultrasonic-testing/?couponCode=2.7Kstudents Acoustic Impedance: Ultrasonic Testing Acoustic Impedance This is a special promo on the #UT-L1 course! Act now click on the link and take the course for only $10 Ultrasonic Testing Basic Principle of Ultrasonic Testing Introduction to Ultrasonic Testing Phased Array Ultrasonic Testing (PAUT) Lecture 58: Defects Types: Ultrasonic Testing Level 1 Training Vidéos populaires – Contrôle par ultrasons NDT Ultrasonic Testing Birring NDT Series, Ultrasonic Testing # 1B, Thickness Measurement Calibration Steps Automatic Ultrasonic Testing (AUT) Applus RTD NDT Ultrasonic Testing SNUP Ultrasonic Testing Machine - SAW pipe inspection Ultrasonic Testing and Detection of Longitudinal Defects in Carbon Steel Pipe Birring NDT Series, Ultrasonic Testing # 4, Angle Beam Shear Wave UT as per AWS D1.1 How to draw DAC in Ultrasonic Testing Vidéos populaires – Contrôle non destructif et Contrôle par ultrasons Ultrasonic Testing Of Weld Introduction to Ultrasonic Inspection - Animated "EZ to Learn" Birring NDE Center, Ultrasonic Testing # 1A, Thickness Measurement Ultrasonic Testing Distance Amplitude Correction (DAC) Tutorial Video Long range ultrasonic testing using Teletest Focus
Views: 11798 el mustapha ben bihi
ACOUSTIC QUALITY INDICATORS (1/2)
 
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ACOUSTIC QUALITY INDICATORS (1/2) Module Contents: Criteria for background noise Criteria for acoustical quality
Mod-01 Lec-08 Lecture 8 : Impedance Tube Technique
 
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Acoustic Instabilities in Aerospace Propulsion by Prof. R.I. Sujith, Department of Aerospace Engineering, IIT Madras. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 2590 nptelhrd
Basic principles of ultrasound
 
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10 minute powerpoint covering piezoelectric effect, acoustic impedance, generation of an ultrasound image and ultrasound characteristics of different tissues.
Views: 42972 RAH ICU
Example-guided Physically-based Modal Sound Synthesis
 
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Linear modal synthesis methods have often been used to generate sounds for rigid bodies. One of the key challenges in widely adopting such techniques is the lack of automatic determination of satisfactory material parameters that recreate realistic audio quality of sounding materials. We introduce a novel method using pre-recorded audio clips to estimate material parameters that capture the inherent quality of recorded sounding materials. Our method extracts perceptually salient features from audio examples. Based on psychoacoustic principles, we design a parameter estimation algorithm using an optimization framework and these salient features to guide the search of the best material parameters for modal synthesis. We also present a method that compensates for the differences between the real-world recording and sound synthesized using solely linear modal synthesis models to create the final synthesized audio. The resulting audio generated from this sound synthesis pipeline well preserves the same sense of material as a recorded audio example. Moreover, both the estimated material parameters and the residual compensation naturally transfer to virtual objects of different sizes and shapes, while the synthesized sounds vary accordingly. A perceptual study shows the results of this system compares well with real-world recordings in terms of material perception [Zhimin Ren, Hengchin Yeh, and Ming C. Lin]. http://gamma.cs.unc.edu/AUDIO_MATERIAL/
Views: 16540 GAMMA UMD
Lead Guitar | 4 Techniques For Your Practice Routine
 
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You need to rip a crazy solo... but first you must practice! Check out these simple lead guitar techniques that will raise your guitar game to master status. You'll be shredding in no time! Follow Marty On Social Media! Instagram - http://www.instagram.com/martyschwartz Twitter - http://www.twitter.com/martyschwartz Facebook - http://www.facebook.com/martyschwartzofficial http://www.MartyMusic.com Hey guys, Marty here with my Friday Technique lesson. Here's 4 important things to quickly get better at soloing. Hope it helps! Have a great weekend! Marty http://www.MartyMusic.com
Views: 953323 Marty Music
First Year Physics, Ch 9 - Explain Polarization - Physical Optics - FSc Physics Book 1
 
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In this online lecture, Sir Qasim Jalal explains 1st year Physics Chapter 9 Physical Optics. The topic being discussed is Topic 9.12 Polarization. punjab text book board/Sindh text book board/KPK text book board inter part 1 physics book 1 lecture is conducted in Urdu/hindi/English. This lecture for Pre Medical / Engineering 11th class for physics chapter 9 is created for all students who want to prepare this topic in detail. For more videos of Qasim Jalal visit https://www.ilmkidunya.com/study/11th-class-physics/physical-optics.aspx If you have any questions about this lecture on Physics inter part 1 ch. 9, you can go to https://www.instutor.com/11th-class/physics/physical-optics
Views: 23279 ilmkidunya
FACS - Fluorescence Activated Cell Sorting - Steffen Schmitt (DKFZ)
 
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https://www.ibiology.org/techniques/facs Dr. Steffen Schmitt explains the principles of FACS and describes the basic components of a droplet cell sorter. He gives advice on optimizing the yield, purity, recovery time, and viability of isolated cells. FACS (fluorescence activated cell sorting) differs from conventional flow cytometry in that it allows for the physical separation, and subsequent collection, of single cells or cell populations. FACS is useful for applications such as establishing cell lines carrying a transgene, enriching for cells in a specific cell cycle phase, or studying the transcriptome or genome or proteome of a whole population on a single cell level. Dr. Steffen Schmitt explains the components and basic function of droplet-based cell sorters. He also provides strategies to optimize the key values in cell sorting (e.g. yield, purity, recovery time, and viability) depending on the downstream assay to be performed on the isolated cells. Speaker Biography: Dr. Steffen Schmitt studied biology at the Ruprecht-Karls-University of Heidelberg and completed his PhD in the Department of Cellular Immunology at the German Cancer Research Center (DKFZ). After a short post-doc, he established and led a flow cytometry core lab at the Natural Science and Medical Research Center (NMFZ) at Johannes Gutenberg University of Mainz. Since 2007, Schmitt has been head of the Flow Cytometry Unit of the Imaging and Cytometry Core Facility at the DKFZ in Heidelberg.
Views: 2354 iBiology Techniques
Workshop: Pipeline Leak Detection Using Soft-Sensing Methods
 
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Pipelines are amongst the safest and most efficient means of transport available. For this reason, leak monitoring systems are a necessary part of their safety concept. This workshop delves into the fundamental principle of Soft Sensing with the E-RTTM method used by KROHNE for leak monitoring, showing the potential of the system by way of a sample case taken from the chemical industry.
Views: 3591 KROHNE Group
Passive acoustic monitoring on a Wave Glider for fish spawning aggregation
 
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Webinar Recorded: April 24, 2018 Abstract: Many commercially important reef fishes in the Caribbean and southeast US have been overfished to the point that some species, like the Nassau grouper, is considered threatened and on the endangered species list. Mature adults of some species gather in large numbers every year for two to three months at specific locations to spawn. Once located, the spawning aggregations become an easy target that can be reduced until it can no longer be formed. Most grouper and snapper spawning aggregations in the region have been extirpated and the few that have been documented are vulnerable unless protection can be enacted. We have developed and demonstrated a novel, autonomous approach to conduct fishery independent surveys in order to search and discover unreported aggregations by mapping the underwater acoustic landscape using an unmanned platform in areas that surround currently known spawning aggregations during the spawning season. While passive acoustic methods have previously been used for fisheries management and stock assessment, the platforms and algorithms are not currently mature enough to allow for advanced autonomy, drastically limiting the spatial and temporal range, and resulting in considerable operational costs. In addition to discovering previously unknown spawning sites, the development of novel algorithms, and passive acoustic and environmental sensor systems enables monitoring along with automated detection, classification and surveillance of fish vocalizations. As well as providing significantly finer scale detection with low latency, this innovative approach also enables greater on-board intelligence and autonomy; reduced launch/recovery and satellite data cost thus further reducing the overall operational costs, while enhancing performance for ocean monitoring missions. About the Presenter Laurent Cherubin obtained a bachelors with a major in mechanics and a minor in mathematics at the University of Bordeaux (France). Then he acquired a MS in coastal oceanography and PhD fellowship from the French Navy - graduating from the University of the Mediterranean in Marseille (France) in 2000. Laurent Cherubin was a postdoctoral researcher at the University of Lisbon (Portugal), at the Institute of Oceanography for two years, before he joined the Rosenstiel School of Marine and Atmospheric Science at University of Miami, where he spent most of his early career. Since August 2013 he has been a research Associate Professor at FAU's Harbor Branch Oceanographic Institute and his expertise is in physical oceanography, numerical modeling, biophysical modeling, marine connectivity, fish acoustics and autonomous underwater vehicle.
Views: 25 SECOORA
seismic physical attributes 1
 
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Physical attributes Physical attributes relate to physical qualities and quantities. The magnitude of the trace envelope is proportional to the acoustic impedance contrast, frequencies relate to the bed thickness, wave scattering and absorption. Instantaneous and average velocities directly relate to rock properties. Consequently, these attributes are mostly used for lithological classification and reservoir characterization.
Views: 1104 SelfTraining STO
Rendering Volumetric Haptic Shapes in Mid-Air using Ultrasound - Fast Forward
 
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For latest updates follow us at: Website - http://big.cs.bris.ac.uk/ Facebook - facebook.com/BristolIG; Twitter - @BristolIG B. Long, S. A. Seah, T. Carter and S. Subramanian, Rendering Volumetric Haptic Shapes in Mid-Air Using Ultrasound, Volume 33, Issue #7 of ACM Transactions on Graphics (Siggraph Asia) 2014. Full Video at - https://www.youtube.com/watch?v=kaoO5cY1aHk We present a method for creating three-dimensional haptic shapes in mid-air using focused ultrasound. This approach applies the principles of acoustic radiation force, whereby the non-linear effects of sound produce forces on the skin which are strong enough to generate tactile sensations. This mid-air haptic feedback eliminates the need for any attachment of actuators or contact with physical devices. The user perceives a discernible haptic shape when the corresponding acoustic interference pattern is generated above a precisely controlled two-dimensional phased array of ultrasound transducers.
Views: 185456 BristolIG lab
Novel method for distance measurement: Focus-Induced Photoresponse (FIP) developed by trinamiX
 
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Focus-Induced Photoresponse (FIP) is a novel approach to measure distances. Its working principle is fundamentally different from established techniques to acquire depth information, such as time-of-flight, triangulation, stereo vision or image processing based methods. FIP takes advantage of a specific phenomenon in photodetector devices: the irradiance-dependent photoresponse. The photoresponse of these devices depends not only on the amount of light incident, but also on the size of the light spot on the detector. We call this the “FIP effect” and we use it to measure distance measurements. The main components of the system are a modulated LED as light source, a camera lens, and two FIP photodetectors. The sensor output is impacted by the irradiance on the sensor i.e. how well the light is focused, and by the total amount of light collected by the lens. By forming the quotient of the signals of two detectors, the dependence on total light as well as fluctuations in the output of the light source cancel out. Due to the FIP effect, the quotient changes with the distance, yielding a unique signature for each LED position. A calibration curve is created that assigns an unambiguous quotient signal to each distance. Hence, the FIP technique does not require computationally intensive algorithms. FIP is very versatile and the FIP effect can be observed in various materials like DSSC, silicon, lead sulfide and more. This enables us to provide depth sensing from the UV to the infrared range. FIP has been developed and patented by trinamiX – pioneer in adaptive 3D sensing. Learn more about FIP at http://www.xperyenz.com/FIP trinamiX GmbH, based in Ludwigshafen, is a spin-off and wholly-owned subsidiary of BASF SE. It has been founded in 2015. The team is developing the most versatile sensor systems in adaptive 3D sensing - XperYenZ™. XperYenZ™ and trinamiX are brands of BASF – We create chemistry.
Views: 3364 BASF
Instrumentation - EMAT
 
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Electromagnetic Acoustic Transducer-- Created using PowToon -- Free sign up at http://www.powtoon.com/youtube/ -- Create animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 3397 Mars Goh
LEVITATING ORANGE
 
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Levitation (from Latin levitas "lightness")[1] is the process by which an object is suspended by a physical force against gravity, in a stable position without solid physical contact. A number of different techniques have been developed to levitate matter, including the aerodynamic, magnetic, acoustic, electromagnetic, electrostatic, gas film, and optical levitation methods.
Views: 5599 AkberdinN
Roland Kayn: Cybernetics III (1969/1977)
 
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Roland Kayn (1933-2011): Cybernetics III (1969/1977). "In my work the compositorial redactional methods are determined by acoustic-physical considerations. Important stimulation resulted from experience and knowledge of information theory and cybernetics. His development took a path outside the serial-aleatoric tendencies of the fifties, a path which can be described by the term 'cybernetic music'. Since 1962, working on my scores of 'Galaxis' and 'Allotropie', I have been increasingly interested in the problem of the extent to which processes of automatically cybernetic origins can be reduced to the organic-sensory realm. In 'Cybernetics III' (1969) the main object was to control several independent sound sources in such a way that density of information corresponds to certain entropy values. In the version produced in the Studio di Fonologia in Milan, ten sound sources are placed in relation to one another according to a particular selection principle. The entire basic material consists of sound spectra of vocal origin. In contrast to purely electronic sound production, in which various oscillators provide the basic material, vocal spectra seemed to be more flexible in their inner structure for purposes of further transformation. Six basic categories of sound material are used, including animal noises too. The material is modulated by means of electro-acoustic equipment and transformed by stages into new sound qualities." Roland Kayn (fonte web). **** The music published in our channel is exclusively dedicated to divulgation purposes and not commercial. This within a program shared to study classic educational music of the 1900's (mostly Italian) which involves thousands of people around the world. If someone, for any reason, would deem that a video appearing in this channel violates the copyright, please inform us immediately before you submit a claim to Youtube, and it will be our care to remove immediately the video accordingly. Your collaboration will be appreciated.
Views: 41872 TheWelleszCompany
Physical Basis of EMAT
 
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EMAT is the abbreviation for Electromagnetic Acoustic Transducer. An EMAT is a non-destructive ultrasonic testing device, which has overcome many of the issues faced by the more conventional piezo probes.
"Antigravity" Method 12 of 15, Electromagnetic Fields DC Pulse, AC LF, & HF Group IIIBii
 
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GROUP III ELECTROMAGNETIC-AC Oscillating electromagnetic fields Filmed 1991-1996, 11 of 15 methods of levitating an object known to the author John Iwaszko, edited from the video Antigravity the reality made in 1996. The antigravity method shown in this edit, was introduced and was referred to as Magnetic Pulse Propulsion which has now been reclassified by the author as Electromagnetic AC Group IIIB ii) Electrodynamic Suspension (EDS)-Induced currents/Eddy currents- Oscillating electromagnetic Fields- DC Pulse, AC (LF, & HF) The 12th Method of antigravity is achieved in a very similar way to that of the previous method 11 but instead of mechanically inducing Relative motion between conductors and magnets, relative motion is induced by time varying currents of electricity generally referred to as alternating currents or AC. The simple experiment showed that if we raise a magnet away from a conducting loop of wire, the movement of the magnet generates a current through the loop in this direction that it opposes the change of the Magnetic field in the upward direction then the coil will produce a magnetic field in the opposing direction attracting the magnet. If we reverse the situation and push the magnet towards the coil the current will reverse in the loop and the magnetic field repelling the magnet. This is shown here demonstrating that a magnet can push a ring of non ferrous aluminium away by relative motion and that the effect is also reduced when the ring is open circuit. We can use this general principle to create levitation or negative gravity that generally pushes conductors away but can also be made stable by various means other than pivoting or tethering which we will now discuss. WARNING:- Some of these experiments operate directly from 240VAC mains supply or far higher voltages at high currents are potentially lethal. Do not build unless you know exactly what you are doing. Do not touch any part of the equipment while it is plugged into a mains outlet. And remember that the methods described do not conform to any electrical safety standard and many of the experiments performed are downright dangerous. Powerful magnets such as neodymium magnets or powerful magnetic fields generated by coils can be dangerous and not to be played with. Powerful magnets or magnetic fields can crush fingers. The power of magnetism can also cause chunks of metal to take flight and cause injury to body parts and or blindness. Rotating machinery can pose a danger from rotating or reciprocating parts. Particularly when machine parts move toward each other, or one part moves past another, which can crush limbs. Extremely intense sounds can burst ear drums or can be physically painful to human ears. High-intensity ultrasound waves are extremely dangerous to experiment with as they can heat human eyes or other tissue by absorbing ultrasound energy which becomes heat by vibration and corresponding energy loss. Exposure to radio frequency energy or ionizing radiation that can be generated by coils can not only burn as they get hot but also cause radiation burns, damage to the skin or other biological tissue. Direct skin contact with liquid nitrogen will cause severe frostbite (cryogenic or cold burns). This may happen almost instantly on contact, there is always a potential hazard when handling liquid nitrogen. Be careful! Use good solid judgement in your work, and think ahead. I John Iwaszko do not endorse the experiments shown, and am merely passing on information, I have learnt through experiment. Safety is your responsibility!
Views: 695717 John Iwaszko
EAGE E-lecture: Viscoelastic Full Waveform Inversion, by Gabriel Fabien-Ouellet
 
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Seismic propagation may exhibit very complex physics, especially on land where elastic and attenuation are dominating effects. In this context, full waveform inversion (FWI) must move from the acoustic approximation to the more challenging viscoelastic wave equation. In this video, Gabriel Fabien-Ouellet explains the theory behind viscoelastic full waveform inversion. Using a symmetrization transformation of the problem, he shows how the adjoint state method can be modified to simplify the numerical implementation of viscoelastic FWI, and then presents the main challenges of inverting for attenuation.
Views: 990 EAGE Channel
EMAT thickness gauge
 
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http://cmdiag.com Contactless electromagnetic acoustic thickness gauge UT-04 EMA (Delta) is developed for measurements of thickness of metal in diapason from 1 to 400 mm. Unlike to contact thickness gauges with piezoelectric transducers which generate longitudinal acoustic waves, EMAT thickness gauge generates transverse ultrasonic waves. Velocity of transverse ultrasonic waves twice less than longitudinal. It doubles resolution of measurements. For acceleration of measurements and its convenience rolling transducer for B-scan mode - thickness profile chart. Thickness and coordinate can be obtained simultaneously moving rolling transducer along the object of measurements. Special transducers for pipes – contactless with possibility of measurements on moving pipes. Transverse ultrasonic waves can be generated through air gap or nonmetallic layer up to 3 mm. No clean-up, no couplant. Transmission of transverse ultrasonic waves are almost 100% reflective from the nearest interface, so holes, layering or nonmetallic inclusions can be detected. Base accuracy of the thickness gauge UT-04 EMA (Delta) is ± 0.03 mm. On flat-parallel surfaces 0.01 mm accuracy can be achieved. The gauge is packed with the bag which can be fixed on neck or on belt.
Views: 1693 CM Diagnostics
Communication Acoustics | RWTHx on edX | Course About Video
 
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Learn about the various ways we hear and perceive sound and how to improve technology and products for better communication. Take this course free on edX: https://www.edx.org/course/communication-acoustics-rwthx-ca101#! ABOUT THIS COURSE In this engineering course, we will cover all aspects of communication acoustics, which is the way sounds travels from a source, through a channel and finally to a receiver. We will look at the different system components involved in acoustic communication, including those between humans, between humans and machines, and between machines. This includes: - speech acoustics - hearing acoustics - electroacoustics - spatial sound capture and presentation - simulation of acoustical environments - the human auditory system - digital audio processing methods You will learn from top experts in the field of communication acoustics, who are all affiliated with TU9, the nine leading Universities of Technology in Germany. Together, they have pooled their expertise in order to teach a comprehensive basic understanding and indicate current research trends to you. After completion of the course, you will have gained a broad understanding of the involved subdomains, and will be ready to pick a specialization for future in-depth study. WHAT YOU'LL LEARN - Fundamentals of physical acoustics and room acoustics - Speech acoustics - Psychoacoustics - Signals and systems - Methods for spatial sound capture and presentation - Product sound design
Views: 1067 edX
Module 1 - Introduction 1
 
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Module 1 - Introduction 1 Prof. Abhijit Sarkar Department Of Mechanical Engineering IIT Madras
Intro, sound wave versus vibration, different types of waves, octave, music scales, sense of SPL
 
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Acoustics by Prof. Nachiketa Tiwari,Department of Mechanical Engineering,IIT Kanpur.For more details on NPTEL visit http://nptel.ac.in
Views: 16658 nptelhrd
UNSW SPREE 201805-17 Irina Kabakova -  Acoustic phonon speeds in hybrid perovskites
 
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UNSW School of Photovoltaic and Renewable Energy Engineering The effect of ionic composition on acoustic phonon speeds in hybrid perovskites Irina Kabakova University of Technology Sydney To view complete with slides: http://www2.pv.unsw.edu.au/videos/Irina-Kabakova-17May2018/ To view additional seminars: https://www.engineering.unsw.edu.au/energy-engineering/public-research-seminars/ Homepage: http://www.pv.unsw.edu.au ABSTRACT: Hybrid organic-inorganic perovskites (HOIPs) have recently emerged as highly promising solution-processable materials for photovoltaic and other optoelectronic devices. HOIPs represent a broad family of materials with properties highly tuneable by the ions that make up the perovskite structure as well as their multiple combinations. Interestingly, recent high-efficiency PV devices using HOIPs with substantially improved long-term stability have used combinations of different ionic compositions. The structural dynamics of these systems are unique for semiconducting materials and are currently argued to be central to HOIPs stability and charge-transport properties. In this talk I will examine the impact of ionic composition on phonon speeds of HOIPs from Brillouin spectroscopy experiments and density functional theory calculations for FAPbBr3, MAPbBr3, MAPbCl3, and the mixed halide MAPbBr1.25Cl1.75. The results show that the acoustic phonon speeds can be strongly modified by ionic composition, which I will explain by analysing the lead-halide sublattice in detail. The vibrational properties of HOIPs are therefore tuneable by using targeted ionic compositions in the perovskite structure. This has an important implication to further improvements in the stability and charge-transport properties of these systems. SHORT BIOGRAPHY: Dr Irina Kabakova is a lecturer and researcher with the School of Mathematical and Physical Sciences, University of Technology Sydney. She is currently working in the field of biomechanics, Brillouin imaging and micro-mechanical characterisation of novel materials. She graduated with a PhD in 2012 from the University of Sydney, then worked as a postodoctoral researcher in Nonlinear Phononics (the University of Sydney) and NanoOptics (AMOLF, Amsterdam) groups. In 2015 Dr Kabakova was awarded Imperial College London Research Fellowship to direct her own project in Brillouin imaging and endoscopy. She joined the University of Technology Sydney in December 2017 in the role of a Senior Lecturer.
Views: 220 UNSWSPREE
Fairy Lights in Femtoseconds: Tangible Holographic Plasma (SIGGRAPH)
 
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Fairy Lights in Femtoseconds: Aerial and Volumetric Graphics Rendered by Focused Femtosecond Laser Combined with Computational Holographic Fields Yoichi Ochiai*, Kota Kumagai**, Takayuki Hoshi***, Jun Rekimoto****, Satoshi Hasegawa**, and Yoshio Hayasaki** *University of Tsukuba ** Utsunomiya University ***Nagoya Institute of Technology **** The University of Tokyo and Sony CSL project page: http://digitalnature.slis.tsukuba.ac.jp/2015/06/fairy-lights-in-femtoseconds/ Abstract We present a method of rendering aerial and volumetric graphics using femtosecond lasers. A high-intensity laser excites a physical matter to emit light at an arbitrary 3D position. Popular applications can then be explored especially since plasma induced by a femtosecond laser is safer than that generated by a nanosecond laser. There are two methods of rendering graphics with a femtosecond laser in air: Producing holograms using spatial light modulation technology, and scanning of a laser beam by a galvano mirror. The holograms and workspace of the system proposed here occupy a volume of up to 1 cm^3; however, this size is scalable depending on the optical devices and their setup. This paper provides details of the principles, system setup, and experimental evaluation, and discussions on scalability, design space, and applications of this system. We tested two laser sources: an adjustable (30-100 fs) laser which projects up to 1,000 pulses per second at energy up to 7 mJ per pulse, and a 269-fs laser which projects up to 200,000 pulses per second at an energy up to 50 ¹J per pulse. We confirmed that the spatiotemporal resolution of volumetric displays, implemented with these laser sources, is 4,000 and 200,000 dots per second. Although we focus on laser-induced plasma in air, the discussion presented here is also applicable to other rendering principles such as fluorescence and microbubble in solid/liquid materials. Yoichi Ochiai, Kota Kumagai, Takayuki Hoshi, Jun Rekimoto, Satoshi Hasegawa, Yoshio Hayasaki, Fairy Lights in Femtoseconds: Aerial and Volumetric Graphics Rendered by Focused Femtosecond Laser Combined with Computational Holographic Fields, http://arxiv.org/abs/1506.06668 (ArXiv Preprint: *Submitted to ACM Transactions on Graphics (via Acceptance with major revision in ACM SIGGRAPH 2015) Yoichi Ochiai, Kota Kumagai, Takayuki Hoshi, Jun Rekimoto, Satoshi Hasegawa, and Yoshio Hayasaki: Fairy Lights in Femtoseconds: Aerial and Volumetric Graphics Rendered by Focused Femtosecond Laser Combined with Computational Holographic Fields, Proc. ACM SIGGRAPH 2015, Emerging Technologies, accepted, Los Angeles, California (USA), 9-13 Aug., 2015. [Demo] Yoichi Ochiai, Kota Kumagai, Takayuki Hoshi, Jun Rekimoto, Satoshi Hasegawa, and Yoshio Hayasaki: Fairy Lights in Femtoseconds: Aerial and Volumetric Graphics Rendered by Focused Femtosecond Laser Combined with Computational Holographic Fields, Proc. ACM SIGGRAPH 2015, Posters, accepted, Los Angeles, California (USA), 9-13 Aug., 2015. [Poster] Yoichi Ochiai, Kota Kumagai, Takayuki Hoshi, Jun Rekimoto, Satoshi Hasegawa, and Yoshio Hayasaki: Fairy Lights in Femtoseconds: Aerial and Volumetric Graphics Rendered by Focused Femtosecond Laser Combined with Computational Holographic Fields, Proc. ACM SIGGRAPH 2015, Talks, accepted, Los Angeles, California (USA), 9-13 Aug., 2015.
Views: 1056004 Yoichi Ochiai
DAFx17 Tutorial 4: Julian Parker - From Algorithm to Instrument
 
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Presented at the 20th International Conference on Digital Audio Effects (DAFx17) Tuesday 5th September 2017, Edinburgh http://dafx17.eca.ed.ac.uk/ Tutorial Abstract: The discipline of designing algorithms for creative processing of musical audio is now fairly mature in academia, as evidenced by the continuing popularity of the DAFx conference. However, this large corpus of work is motivated primarily by the traditional concerns of the academic signal-processing community - that being technical novelty or improvement in quantifiable metrics related to signal quality or computational performance. Whilst these factors are extremely important, they are only a small part of the process of designing an inspiring and engaging tool for the creative generation or processing of sound. Algorithms for this use must be designed with as much thought given to subjective qualities like aesthetics and usability as to technical considerations. In this tutorial I present my own experiences of trying to bridge this gap, and the design principles I've arrived at in the process. These principles will be illustrated both with abstract examples and with case studies from the work I've done at Native Instruments. Speaker Bio: Julian Parker is a researcher and designer working in the area of musical signal processing. He started his academic career studying Natural Sciences at the University of Cambridge, before moving on to study for the MSc in Acoustics & Music Technology at the University of Edinburgh. In 2013, he completed his doctoral degree at Aalto University, Finland, concentrating on methods for modelling the audio-range behaviour of mechanical springs used for early artificial reverberation. Since graduating he has been employed at Native Instruments GmbH, where he now heads up DSP development and research. He has published on a variety of topics including reverberation, physical modelling of both mechanical and electrical systems, and digital filter design.
Views: 769 AAG Edinburgh
PathFinder Method: Buddha's #1 Physical Conditioning Tip
 
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http://www.pathfindermethod.com/ How can you use this little Buddhist gem in your own physical training ?I'm not really a Buddhist but I love his wisdom and love to apply it to my life and my physical practice. PathFinder Performance Notes: There's too much emphasis on the extreme. Extreme Bootcamps, Extreme Metabolic Meltdowns, Extreme Makeovers and 30-Day Transformations. You just have to fit into those skinny jeans don't you hipster? On the other hand there's a huge percentage of the population that are extremely inactive, moving from the couch to the car, from the car to the desk and finally settling back into the couch again at night. There's not enough discussion of meeting somewhere in the middle, a sustainable and enjoyable active lifestyle. There's no need for extremes. Extreme efforts don't last and usually result in resentment. I've seen many people harassed into thinking that they need to train harder and more intensely when in actuality what they needed was some relaxing walks in the great outdoors with some friends. What's the point of all that discipline if it leaves you full of resentment, pissed off and grumpy all the time? Calm down and take the Middle Path. Little drops of water wear away stone because of their consistency and persistence, not because of their intensity. "Find something you love to do and do it on most days of the week, when all else fails go for a long walk" - Frank Forencich Exuberant Animal. Simplicity rules. Make your physical practice as practical and convenient as possible. Nothing trains the body better than the body. And where ever you go there it is. You can't be too loose with your physical practice but you can't be too tight either. Challenge your body and it's tissues but match those challenges with deep rest and re-creation. Let me hear your voice below! So...let me know how you can apply the Middle Way to your own physical practice? Have you been pushing too hard for far too long? Have you been brainwashed into believing high-intensity workouts are the only valuable option?
Views: 241 Jay Brown
What is NON-CONTACT ULTRASOUND? What does NON-CONTACT ULTRASOUND mean?
 
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What is NON-CONTACT ULTRASOUND? What does NON-CONTACT ULTRASOUND mean? NON-CONTACT ULTRASOUND meaning - NON-CONTACT ULTRASOUND definition - NON-CONTACT ULTRASOUND explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Non-contact ultrasound (NCU) is a method of non-destructive testing where ultrasound is generated and used to test materials without the generating sensor making direct or indirect contact with the test material or test subject. Historically this has been difficult to do, as a typical transducer is very inefficient in air. Therefore most conventional ultrasound methods require the use of some type of acoustic coupling medium in order to efficiently transmit the energy from the sensor to the test material. Couplant materials can range from gels or jets of water to direct solder bonds. However in non-contact ultrasound, ambient air is the only acoustic coupling medium. An electromagnetic acoustic transducer (EMAT), is a type of non-contact ultrasound that generates an ultrasonic pulse which reflects off the sample and induces an electric current in the receiver. This is interpreted by software and provides clues about the internal structure of the sample such as cracks or faults. Research is continuing to improve traditional transducers by applying different plastics, elastomers, and other materials. The sensitivity of these devices continues to improve; a newly developed piezoelectric transducer can produce frequencies in the MHz that can easily propagate through even high acoustic impedance materials such as steel and dense ceramics. Non-contact ultrasound allows some materials to be inspected which otherwise can’t be inspected due to fear of contamination from couplants or water. In general non-contact ultrasound would facilitate testing of materials or components that are continuously rolled on a production line, in extremely hot environments, coated, oxidized, or otherwise difficult to physically contact. Methods for potential medical use are also being investigated Laser ultrasonics is another method of non-contact ultrasound.
Views: 176 The Audiopedia
Synthetic Biology: Building cell signaling networks - Wendell Lim
 
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https://www.ibiology.org/bioengineering/signaling-networks/ Dr. Lim explains that many signaling proteins are built from simple modules arranged in different ways. Some modules are catalytic and transmit information (for instance kinase or phosphatase domains) while others are interaction modules that regulate information flow (for example protein-protein interaction domains). By rearranging these modules, LIm’s lab has reprogrammed signaling pathways to generate novel cell behavior. They are now working to use these techniques to develop cell based therapies. Speaker Biography: Wendell Lim is currently a Professor and Chair of the Department of Cellular and Molecular Pharmacology at University of California-San Francisco, director of the UCSF Center for Systems & Synthetic Biology, as well as an Investigator at Howard Hughes Medical Institute. He obtained his bachelor’s degree from Harvard University and his PhD from MIT. Today, Lim’s lab focuses on the molecular logic of signaling systems and understanding the underlying principles that govern the design, function, and evolution of cell-cell signaling.
Views: 9511 iBiology Techniques
Trignometry Principle solutions and General solutions
 
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Trigonometry (from Greek trigōnon, "triangle" and metron, "measure"[1]) is a branch of mathematics that studies relationships involving lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies. There is an enormous number of uses of trigonometry and trigonometric functions. For instance, the technique of triangulation is used in astronomy to measure the distance to nearby stars, in geography to measure distances between landmarks, and in satellite navigation systems. The sine and cosine functions are fundamental to the theory of periodic functions, such as those that describe sound and light waves. Fields that use trigonometry or trigonometric functions include astronomy (especially for locating apparent positions of celestial objects, in which spherical trigonometry is essential) and hence navigation (on the oceans, in aircraft, and in space), music theory, audio synthesis, acoustics, optics, electronics, biology, medical imaging (CAT scans and ultrasound), pharmacy, chemistry, number theory (and hence cryptology), seismology, meteorology, oceanography, many physical sciences, land surveying and geodesy, architecture, image compression, phonetics, economics, electrical engineering, mechanical engineering, civil engineering, computer graphics, cartography, crystallography and game development.
Views: 43455 The Easy Ways
Making Guitars with a Physics Mind | Curtin University
 
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Dominic Howman presents a lecture the way musical instruments produce sounds. It has been investigated by many scientific studies, both from a curiosity point of view, and to seek improvements or systematic ways of making desired changes to sound production. However, some types of musical instruments are much more difficult to fully understand than others. For example, the way violins work has been know for some time, but some of the basics of the humble acoustic guitar continue to remain as elusive as the fine subtleties of a Stradivarius. This lecture was presented on 23 March 2011. Explore: http://curtin.edu.au/
Views: 355375 Curtin University
Introduction to waves | Mechanical waves and sound | Physics | Khan Academy
 
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Introduction to transverse and longitudinal waves. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/mechanical-waves/v/amplitude-period-frequency-and-wavelength-of-periodic-waves?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnetic-flux-faradays-law/v/faradays-law-for-generating-electricity?utm_source=YT&utm_medium=Desc&utm_campaign=physics Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 991037 Khan Academy
EAGE E-Lecture: Epsilon and Delta in Anisotropic Velocity Model Building by Etienne Robein
 
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The objective of seismic imaging is to get a sharp and accurate image of the elastic reflectivity in the subsurface, especially in complex geological settings. By ‘accurate’, we mean that reflectors should be at the right depth, but also correct lateral position. The accuracy of a Pre-Stack Depth Migration image goes together with our ability to estimate the velocity at which waves propagate in the subsurface. To build such a Velocity Model remains a challenge because the earth is not only heterogeneous (waves propagate at different velocities at different locations), but also anisotropic (propagation velocity is a function of propagation direction). The presentation discusses the physical meaning of Thomsen’s parameters epsilon and delta included in the Model to describe anisotropy. It illustrates a popular method to estimate them in a Pre-Stack Depth Migration project to conclude that borehole calibration is a necessary step to achieve the best accuracy possible. This video is part of EAGE Online Education Programme. The European Association of Geoscientists and Engineers (EAGE) is a global professional, non-profit association for geoscientists and engineers. EAGE strives to promote innovation and technical progress and aims to foster communication and cooperation between those working in, studying or interested in these fields. To learn more about EAGE Education visit www.LearningGeoscience.org The following courses by Etienne Robein are available via EAGE: - Seismic Imaging: A Review of the Techniques, their Principles, Merits and Limitations (EET 4) - Seismic Depth Imaging and Anisotropic Velocity Model Building Consult our Calendar or Events for the next deliveries or request an in-house training proposal!
Views: 7237 EAGE Channel
EAGE E-Lecture: Reverse-time Imaging of Dual-Source 4C Marine Seismic Data by Ivan Vasconcelos
 
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In this video, Ivan Vasconcelos covers the physical principles and practical approach of a wave-equation-based, reverse-time seismic imaging method designed to handle dual-source, four-component acoustic data. Vasconcelos et al. show that the method can naturally make use of source- and receiver-side ghosts in imaging, while bringing additional advantages such as handling finite-frequency directivity and, to some extent, multiple scattering. The concepts are illustrated with both simple and geologically complex models. This video is part of EAGE Online Education Programme. The European Association of Geoscientists and Engineers (EAGE) is a global professional, non-profit association for geoscientists and engineers. EAGE strives to promote innovation and technical progress and aims to foster communication and cooperation between those working in, studying or interested in these fields. To learn more about EAGE Education visit www.LearningGeoscience.org
Views: 801 EAGE Channel