Acoustic Source Localization
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Acoustic Source Localization
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Author : Nilesh Madhu
language : en
Publisher:
Release Date : 2010
Acoustic Source Localization written by Nilesh Madhu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Acoustic Source Localization
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Author : Nilu Zhao
language : en
Publisher:
Release Date : 2016
Acoustic Source Localization written by Nilu Zhao and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Many technologies rely on underwater acoustics. Most of these applications are able to denoise Gaussian noise from the surrounding, but have trouble removing impulse like noises. One source of impulse-like noise is the snapping shrimps. The acoustic signals they emit from snapping their claws hinder technologies, but can also be used as a source of ambient noise illumination due to the rough uniformity in their spatial distribution. Understanding the spatial distributions of these acoustic signals can be useful in working to mitigate or amplify their effects. Our collaborators in Singapore use a multi-array sensor to take measurements of the sound pressures of the environment in the ocean. This thesis investigates in solving the signal reconstruction problem -- given the measurements, reconstruct the locations of the original signal sources. A numerical model for the system consisting of the snapping shrimp signals, the environment, and the sensor is formulated. Three methods of reconstruction -- Disciplined Convex Programming, Orthogonal Matching Pursuit, and Compressive Sensing -- are explored, and their robustness to noise, and sparsity are examined in simulation. Results show that Two-Step Iterative Shrinkage Threshold (TwIST) is the most robust to noisy and non-sparse signals. The three methods were then tested on real data set, in which OMP and TwIST showed promising consistency in their results, while CVX was unable to converge. Since there is no available information on ground truth, the consistency is a promising result.
Efficient Time Of Arrival Calculation For Acoustic Source Localization Using Wireless Sensor Networks
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Author : Prashanth G. Reddy
language : en
Publisher:
Release Date : 2011
Efficient Time Of Arrival Calculation For Acoustic Source Localization Using Wireless Sensor Networks written by Prashanth G. Reddy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Acoustic localization categories.
Acoustic source localization is a very useful tool in surveillance and tracking applications. Potential exists for ubiquitous presence of acoustic source localization systems. However, due to several significant challenges they are currently limited in their applications. Wireless Sensor Networks (WSN) offer a feasible solution that can allow for large, ever present acoustic localization systems. Some fundamental challenges remain. This thesis presents some ideas for helping solve the challenging problems faced by networked acoustic localization systems. We make use of a low-power WSN designed specifically for distributed acoustic source localization. Our ideas are based on three important observations. First, sounds emanating from a source will be free of reflections at the beginning of the sound. We make use of this observation by selectively processing only the initial parts of a sound to be localized. Second, the significant features of a sound are more robust to various interference sources. We perform key feature recognition such as the locations of significant zero crossings and local peaks. Third, these features which are compressed descriptors, can also be used for distributed pattern matching. For this we perform basic pattern analysis by comparing sampled signals from various nodes in order to determine better Time Of Arrivals (TOA). Our implementation tests these ideas in a predictable test environment. A complete system for general sounds is left for future work.
Acoustic Source Localization In A Room Environment And At Moderate Distances
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Author : Pasi Pertilä
language : en
Publisher:
Release Date : 2009
Acoustic Source Localization In A Room Environment And At Moderate Distances written by Pasi Pertilä and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Acoustic Source Localization And Signal Separation Using A Circular Microphone Array With A Vertical Extension
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Author : 吳柏辰
language : en
Publisher:
Release Date : 2017
Acoustic Source Localization And Signal Separation Using A Circular Microphone Array With A Vertical Extension written by 吳柏辰 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Acoustic Source Localization Using A Machine Learning Approach
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Author : Carter A. Ebrey
language : en
Publisher:
Release Date : 2020
Acoustic Source Localization Using A Machine Learning Approach written by Carter A. Ebrey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Acoustic localization categories.
Acoustic Source Localization And Deconvolution Based Separation
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Author : 郭家豪
language : en
Publisher:
Release Date : 2014
Acoustic Source Localization And Deconvolution Based Separation written by 郭家豪 and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Acoustic Source Localization And Separation Using A Sparsely Distributed Microphone Array
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Author : Shih-Syuan Lan
language : en
Publisher:
Release Date : 2018
Acoustic Source Localization And Separation Using A Sparsely Distributed Microphone Array written by Shih-Syuan Lan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Real Time Acoustic Source Localization With Passive Microphone Arrays
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Author : Arden Huang
language : en
Publisher:
Release Date : 2001
Real Time Acoustic Source Localization With Passive Microphone Arrays written by Arden Huang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Microphone categories.
Advances In Sound Localization
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Author : Pawel Strumillo
language : en
Publisher: IntechOpen
Release Date : 2011-04-11
Advances In Sound Localization written by Pawel Strumillo and has been published by IntechOpen this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04-11 with Technology & Engineering categories.
Sound source localization is an important research field that has attracted researchers' efforts from many technical and biomedical sciences. Sound source localization (SSL) is defined as the determination of the direction from a receiver, but also includes the distance from it. Because of the wave nature of sound propagation, phenomena such as refraction, diffraction, diffusion, reflection, reverberation and interference occur. The wide spectrum of sound frequencies that range from infrasounds through acoustic sounds to ultrasounds, also introduces difficulties, as different spectrum components have different penetration properties through the medium. Consequently, SSL is a complex computation problem and development of robust sound localization techniques calls for different approaches, including multisensor schemes, null-steering beamforming and time-difference arrival techniques. The book offers a rich source of valuable material on advances on SSL techniques and their applications that should appeal to researches representing diverse engineering and scientific disciplines.