Results 271 to 280 of about 85,823 (304)
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A harmonic noise model for direction finding in colored ambient noise
IEEE Signal Processing Letters, 1995High-resolution algorithms for direction finding of narrowband sources require a good estimate of the noise correlation matrix. We derive a physically motivated linear noise model. It is based on a Fourier expansion of the ambient noise field and is applicable to arbitrary antenna arrays. We also show that for contrived cases, a linear model may not be
Filiep Vanpoucke, Arogyaswami Paulraj
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Speech Communications as Limited by Ambient Noise
The Journal of the Acoustical Society of America, 1964Speech-intelligibility scores as a function of noise level are studied for face-to-face, sound-powered-phone, and amplified speech (earphone and loudspeaker) communication conditions. The speech-interference level (SIL) for octaves of noise centered at 500, 1000, and 2000 cps (0.5/1/2) is used as the measure of noise level. By using this noise measure,
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Robustness and constraints of ambient noise inversion
The Journal of the Acoustical Society of America, 2008One of the most dominant sources of error in the estimation of sonar performance in shallow water is the geoacoustic description of the sea floor. As reviewed in this paper, various investigators have studied the possible use of ambient noise to infer some key parameters such as the critical angle, geoacoustic properties, or bottom loss.
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Target detection and location with ambient noise
The Journal of the Acoustical Society of America, 2008By placing a vertical array in an ambient noise field and forming an upward and a downward beam one obtains two time series which can be cross correlated to reveal a subbottom profile of the seabed [Siderius et al., J. Acoust. Soc. Am. 120, 1315–1323 (2006)]. Here the cross-correlation approach is applied to the location in range and bearing of a point
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Ambient Noise Is "The New Secondhand Smoke"
Acoustics Today, 2019Ambient noise is “the new secondhand smoke.” Like secondhand smoke, excessive ambient noise is not just a nuisance but is a health and public health problem for millions of Americans. Excessive ambient noise causes hearing loss; disrupts sleep, function, and communication; and causes non-auditory health effects including cardiovascular disease and ...
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Calibration matters: II. Measurement of ambient noise in test rooms/areas
Journal of Communication Disorders, 2023Chung
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Surface‐Wave Attenuation From Seismic Ambient Noise: Numerical Validation and Application
Journal of Geophysical Research: Solid Earth, 2021Fabrizio Magrini, Lapo Boschi
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