Results 241 to 250 of about 1,599,200 (292)

Enhancement of speech corrupted by acoustic noise

ICASSP '79. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005
This paper describes a method for enhancing speech corrupted by broadband noise. The method is based on the spectral noise subtraction method. The original method entails subtracting an estimate of the noise power spectrum from the speech power spectrum, setting negative differences to zero, recombining the new power spectrum with the original phase ...
Michael G. Berouti, Richard M. Schwartz, John Makhoul   +2 more
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Acoustic Fundamentals and Noise

SAE Technical Paper Series, 1972
<div class="htmlview paragraph">Acoustic noise has been described as “sound without value.” This paper on acoustic noise is a study of what is called sound, treating of how it is generated, how it is propagated, absorbed, and measured. These specifics are discussed, along with some simple examples of how sound is related to the environment in ...
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Urban Noise – A Need for Acoustic Planning

Environmental Monitoring and Assessment, 2001
The noise status of growing urban centres of the country are very much required to develop acoustic design and planning guidelines for various land use classification. An attempt in this direction has been made by measuring noise equivalent levels for cities like Delhi, Jamshedpur, Dehradun and Nagpur. The choice of Ldn (Day-Night noise level) which is
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Acoustic-reflex thresholds for noise stimuli

The Journal of the Acoustical Society of America, 1980
The effect of noise bandwidth on the acoustic-reflex threshold was studied in 12 normal-hearing adult subjects by independently varying the cutoff frequencies of low-pass (fL=100 Hz) and high-pass (fH=6000 Hz) computer-generated noises. Adjusting the cutoff frequency of the low-pass or high-pass activating stimuli over the 700–6000 Hz range resulted in
R H, Margolis, J R, Dubno, R H, Wilson
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Acoustic noise in MRI

2014
Purpose: Hearing loss, caused by noise, is one of the 10 most common diseases in the European Union. The acoustic noise in magnetic resonance (MR) is associated with activation and deactivation of the electrical current that induces vibrations in the...
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Cardiorespiratory Responses to Acoustic Noise in Belugas

2016
To date, most research on the adverse effects of anthropogenic noise on marine mammals has focused on auditory and behavioral responses. Other responses have received little attention and are often ignored. In this study, the effect of acoustic noise on heart rate was examined in captive belugas.
Oleg I, Lyamin, Svetlana M, Korneva, Viatcheslav V, Rozhnov, Lev M, Mukhametov   +3 more
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Overview of a university course on acoustics and noise

The Journal of the Acoustical Society of America, 2012
The Bachelor of Mechanical Engineering at the University of New South Wales in Sydney, Australia is a four year degree program. In their fourth and final year, students can choose from a range of technical elective courses, one of those being in acoustics.
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Evaluation of noise susceptibility: Effects of noise exposure on acoustic reflex

International Archives of Occupational and Environmental Health, 1983
The threshold of acoustic reflex (AR) was measured in workers exposed to occupational noise. White noise (WN), and pure tones of 1 and 4 kHz were selected as activating stimuli for AR. The results were compared with the thresholds of AR (ART) in the normal group (Group C) reported by the authors previously. To examine in relation between noise exposure
T, Miyakita, H, Miura, T, Yamamoto
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Optimization of a noise reduction preprocessing in an acoustic echo and noise controller

1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings, 2002
In hands-free communications, the speech signal to be transmitted is disturbed by ambient noise and acoustic echo. So, processing to reduce these disturbances must be performed before transmission. Classical solutions are cascaded structures where the acoustic echo canceller precedes or follows the noise reduction system.
Beghdad Ayad, Gérard Faucon, Régine Le Bouquin-Jeannès   +2 more
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ACOUSTIC NOISE INTERFEROMETRY

2020
Acoustic noise interferometry uses long time series recordings of ambient and shipping noise, which are concurrently captured at two locations, to measure the acoustic Green’s function. With this technique, each hydrophone becomes a virtual acoustic transceiver—a combination of a source and a receiver—which can be used for passive acoustic remote ...
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