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Array steered response time-alignment for propagation delay compensation for acoustic localization
2008
2008 42nd Asilomar Conference on Signals, Systems and Computers
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Localization methods using directional estimates that compensate this delay exist. This work proposes delay compensation for steered array responses to increase localization performance. ...
The directions are traditionally obtained by steering the array to a direction that maximizes the response. ...
The steered responses of the array are proposed to be time-aligned using the propagation delay and then combined. ...
doi:10.1109/acssc.2008.5074412
fatcat:x7x5mzuo7jbs7j2ub44afruhy4
Array signal processing on distributed acoustic sensing data: directivity effects in slowness space
2022
Journal of Geophysical Research - Solid Earth
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direction-of-arrival for an incoming signal. ...
Array-based methods have been used in seismology since the late 1950s and were adapted from radio astronomy, radar, acoustics, and sonar (Schweitzer, 2014) . ...
Hence, the beamforming procedure which applies the weights Δ m = 𝐴𝐴 − 𝐬𝐬 ⋅ 𝐫𝐫𝑚𝑚 = − md sin(γ 0 ), seeks to compensate for this inter-sensor propagation time difference in order to align the signal ...
doi:10.1029/2021jb023587
fatcat:tdfiyevt6rdo5bsqa5yitwpvam
Field Characterization and Compensation of Vibrational Nonuniformity for a 256-Element Focused Ultrasound Phased Array
2018
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
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There is an increasing interest in using arrays to generate more complex beam shapes and corresponding acoustic radiation force patterns for manipulation of particles such as kidney stones. ...
The purpose of this paper was to characterize the vibrations of a 256-element array at 1.5 MHz, implement strategies to compensate for variability, and test the ability to generate specified vortex beams ...
Acknowledgements We appreciate the help of our colleagues of the Center for Industrial and Medical Ultrasound at the University of Washington and the Laboratory for Industrial and Medical Ultrasound at ...
doi:10.1109/tuffc.2018.2851188
pmid:29994675
pmcid:PMC6344030
fatcat:daxhrwr2bfcdpdwd5vmocqmffa
CABE: A Cloud-Based Acoustic Beamforming Emulator for FPGA-Based Sound Source Localization
2019
Sensors
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Applications including sonar, binaural hearing aid devices, acoustic indoor localization techniques and speech recognition are proposed by several research groups and companies. ...
Several toolboxes and software can be used to obtain a theoretical response of a microphone array with a given beamforming algorithm. ...
Luc also provided us with internal IP addresses for the computers and servers. ...
doi:10.3390/s19183906
pmid:31510098
pmcid:PMC6767114
fatcat:wzsvtf676vh5lmiqucrwnmo3gy
Passive localization of noise-producing targets using a compact volumetric array
2014
Journal of the Acoustical Society of America
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A technique is presented for passively localizing multiple noise-producing targets by crosscorrelating the elevation beams of a compact volumetric array on separate bearings. ...
The technique presented in this paper uses a compact volumetric array mounted to an autonomous underwater vehicle to measure the three-dimensional directionality and time delays of multipath arrivals, ...
"Shallow-water acoustic tomography from angle measurements instead of travel-time measurements," J. Acoust. Soc. Am. 134, EL373-EL379. FIG. 11. ...
doi:10.1121/1.4881917
pmid:24993197
fatcat:7qzdqbesmzcoddedv4dbavcqgi
Automatic matched filter recovery via the audio camera
2010
2010 IEEE International Conference on Acoustics, Speech and Signal Processing
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In this work, an algorithm is proposed to compute the matched lter automatically using an audio camera -a microphone array based system that provides real-time audio images (essentially plots of steered ...
The re ections are associated with sound source(s) using an acoustic similarity metric, and an approximate matched lter is computed to align the re ections in time with the direct arrival. ...
to what is done in steered response power (SRP) beamforming [16] . ...
doi:10.1109/icassp.2010.5496187
dblp:conf/icassp/ODonovanDZ10
fatcat:5bm7fu5stfdkpb5dlouan5tpkq
South China Sea Internal Tide/Internal Waves— Impact on the Temporal Variability of Horizontal Array Gain at 276 Hz
2004
IEEE Journal of Oceanic Engineering
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AbstractÂ-The temporal variability of the spatial coherence of an acoustic signal received on a bottomed horizontal array has been calculated for 276-Hz narrow-band signals. ...
Consequently, this section of data sets an upper bound for the realizable array gain. ...
As a result, the beam-steering corrections in the sourceÂ's direction compensated for the acoustic field wave front curvature. ...
doi:10.1109/joe.2004.836794
fatcat:bcfwugg2xva7bpdowu7lolpea4
Time-reversal acoustics
2008
Journal of Physics, Conference Series
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Al l these applications of time reversal were discussed in the field of linear acoustics, but a very interesting point is that time reversal properties remain valid in the field of nonl inear acoustics ...
We are currently envisioning that time reversal techniques can also be very useful in nonlinear acoustics as it could enhance the image contrast in medical harmonic imaging. ...
This can be obtained by delaying the pulses according to a tilted delay law. In heterogeneous media, this process is only valid for small angles or when aberrations are located close to the array. ...
doi:10.1088/1742-6596/118/1/012001
fatcat:3p37rkm33vf5llsdcvxd2y34va
Phased array beamforming methods for powering biomedical ultrasonic implants
[article]
2022
arXiv
pre-print
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Time reversal is proposed as a computationally simple approach to beamforming that is robust despite scattering and inhomogeneity of the acoustic medium. ...
This paper details the design of a custom planar phased array ultrasound system, which is capable of steering and focusing ultrasound power within a 3D volume. ...
Soner Sonmezoglu, Professor Steven Conolly, and Professor Chris Diederich for technical discussions. ...
arXiv:2203.01493v2
fatcat:dy44e24pmnawpm3nkvjyvrqpoa
Scalable Metagrating for Efficient Ultrasonic Focusing
[article]
2021
arXiv
pre-print
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Previous works have shown that acoustic metagratings can overcome the inherent efficiency limitations of gradient metasurfaces in beam steering. ...
In this work, we propose a new design principle for acoustic metalenses, based on metagratings, to achieve efficient ultrasonic focusing. ...
(33) , simple L-shaped structures have shown to be efficient means for beam steering in cases when only the (-1, 0 and +1) Floquet orders can propagate. ...
arXiv:2104.12937v1
fatcat:ubwzn54kszfyxfvaltj6pdyt2a
Pitch-catch phase aberration correction of multiple isoplanatic patches for 3-D transcranial ultrasound imaging
2013
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
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Delay maps are updated and real-time 3-D scanning resumes. ...
each matrix array to serve as a correction source for the opposing array. ...
Each steered unfocused wave acquisition is used to compute a unique map of delay updates for the receiving array as described. ...
doi:10.1109/tuffc.2013.2590
pmid:23475914
pmcid:PMC3843527
fatcat:qprls6yi5vd3dmf7b4mflm2jaq
Broadband Ultrasonic Attenuation Estimation and Compensation with Passive Acoustic Mapping
2018
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
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As a further step toward clinical application of passive acoustic mapping (PAM), this paper presents methods for attenuation estimation and compensation based on broadband cavitation data measured with ...
a linear ultrasound array. ...
Paverd for their helpful discussions. ...
doi:10.1109/tuffc.2018.2866171
pmid:30130184
fatcat:7hobztu33ng5tlwjsz54z6ihxa
Improving Immersive Experiences in Telecommunication with Motion Parallax [Applications Corner
2011
IEEE Signal Processing Magazine
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The goal of acoustic tracking, or sound source localization, is to derive the sound source from estimating optimal propagation delays t i . ...
A delay and sum beamformer simply delays each microphone signal by the amount needed to align the phases for the desired source location, and adds up all the signals. ...
doi:10.1109/msp.2010.939037
fatcat:fr2jsy5crvb5bin2ujudj2ffiu
Vector Sensor Steering-Dependent Performance in an Underwater Acoustic Communication Field Experiment
2022
Sensors
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A ship suspended acoustic source transmits coherent modulated communication signals at various ranges and from several directions. ...
This paper shows the performance resulting from combining vector sensor directional components in an underwater acoustic communication experiment. ...
(Doppler compensated). δ is a design factor adjusted according to a desired beam response, and θ 0 is a chosen steering angle, where we may set a θ 0 value (−π ≤ θ 0 ≤ π) or use an estimated angle θ0 ...
doi:10.3390/s22218332
pmid:36366029
pmcid:PMC9658437
fatcat:mwgb45czvra7zhvodww3gpwypi
Spatially localized sono-photoacoutic activation of phase-change contrast agents
2020
Photoacoustics
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In contrast, we demonstrate here that localized SPA activation is possible using electronically steered/focused ultrasound pulses. ...
In previous studies, SPA imaging used a broadly illuminated optical pulse combined with plane wave acoustic pulses transmitted from a linear ultrasound array. ...
In this study, we demonstrate that a steered and focused acoustic beam can perform highly localized activation (Fig. 1B) that is more appropriate for a number of applications. ...
doi:10.1016/j.pacs.2020.100202
pmid:32817821
pmcid:PMC7424230
fatcat:erefmygjvrdurhlw5l6whuc4yq
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