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Locating an Acoustic Source Using Low-Cost Hardware
2017The availability of cheap but powerful sensors and signal processing hardware allows the solution of problems, which previously could only be solved at high costs and efforts. In this paper we describe an approach to locate an acoustic sound source by three low cost microphones and operational amplifiers in combination with a simple microcontroller ...
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Acoustic source location using a microphone array
The Journal of the Acoustical Society of America, 2003An apparatus and method in a video conference system provides accurate determination of the position of a speaking participant by measuring the difference in arrival times of a sound originating from the speaking participant, using as few as four microphones in a 3-dimensional configuration.
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Acoustic emission source location on a cylindrical surface
NDT & E International, 1993Acoustic emission (AE) is a stress wave, generated in a structural material when it is stimulated by perturbations. One of the important features of this technique is to detect the location of the AE source in the structure from the differences in the times of arrival of stress waves at several sensors placed on it. A generalized mathematical formalism
P. Barat, P. Kalyanasundaram, Baldev Raj
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Acoustic source location of partial discharges in transformers
SPIE Proceedings, 2010Acoustic emission monitoring is often used in the diagnosis of electrical and mechanical incipient faults in high voltage apparatus. Partial discharges are a major source of insulation failure in power transformers and the differentiation from other sources of acoustic emissions is of the utmost importance.
S. E. U. Lima +6 more
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Acoustic Emission Source Location Using Lamb Wave Modes
Journal of Engineering Mechanics, 1997This paper describes the development of a technique based on acoustic emission (AE) technology that can be used for global nondestructive evaluation (NDE) of steel structures. This will also be useful for the subsequent local inspection used to further monitor cracking, defective connections, retrofit measures, and so forth.
A. K. Maji, D. Satpathi, T. Kratochvil
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Sparsity-Cognizant Source Location Mapping for Underwater Acoustics
MILCOM 2013 - 2013 IEEE Military Communications Conference, 2013Matched-field processing (MFP) is a generalization of classical beamforming that has been traditionally used in underwater source localization problems. However, MFP suffers from low resolution, sensitivity to model mismatch, and is challenged when more than one source is present.
Pedro A. Forero, Paul A. Baxley
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Optimizing Secondary Source Location in Acoustic ANC Systems
2006 2nd International Conference on Information & Communication Technologies, 2006In this paper we show that the location of the secondary source is very important for acoustic ANC systems. We calculate sound propagation in a simulated room with complete reflection of sound waves from the walls by FDTD1method. Then, we choose criteria for noise pressure level and find the best node for anti-noise source, and after that, we estimate ...
S.A. Seyedin, M.H. Abedi
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Acoustic Emission Source Location Based on Signal Features
Advanced Materials Research, 2006Good knowledge of acoustic emission (AE) source location is the basic requirement for further damage mechanism characterization. Calculation of the AE source location is mostly based on arrival time differences of the signals recorded by different transducers.
Michal Blahacek +2 more
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Problems of Locating Acoustic Emission Sources
Russian Journal of Nondestructive Testing, 2021Yu. G. Matvienko +4 more
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Source location of acoustic emission in diesel engines
Mechanical Systems and Signal Processing, 2007Abstract This paper is the third in a series developing methods of mapping acoustic emission (AE) signals and wave propagation in engines and focuses on source location techniques for the multi-source signals on relatively complex structures typical of machinery applications. Two source location techniques, a traditional wave velocity-based and an AE
P. Nivesrangsan, J.A. Steel, R.L. Reuben
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