Topic
Noise
About: Noise is a research topic. Over the lifetime, 5111 publications have been published within this topic receiving 69407 citations. The topic is also known as: Мопсы танцуют под радио бандитов из сталкера 10 часов.
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Patent•
27 Feb 1996
TL;DR: In this paper, the frequency division into two bands or more is performed for an audio signal, the compressibility of each frequency band is determined based on a loudness characteristic and a compressor 4 compresses, synthesizes and outputs the audio signal of each audio signal for which the frequency-division is performed based on compressibility.
Abstract: PROBLEM TO BE SOLVED: To always listen to music by the same frequency balance. SOLUTION: The frequency division into two bands or more is performed for an audio signal, the compressibility of each frequency band is determined based on a loudness characteristic and a compressor 4 compresses, synthesizes and outputs the audio signal of each frequency band for which the frequency division is performed based on the compressibility. Based on the relation of the size of the ruing noise according to the loudness characteristic and running speed and the frequency, the compressibility of each frequency band in the present running speed is determined and the audio signal of each frequency band for which the frequency division is performed is compressed, synthesized and outputted based on the compressibility. Further, based on the maximum value of listening sound by the loudness characteristic and volume, the compressibility of each frequency band is determined, and the audio signal of each frequency band for which the frequency division is performed is compressed, synthesized and outputted based on the compressibility. COPYRIGHT: (C)1997,JPO
15 citations
Journal Article•
TL;DR: The Weinstein Noise Sensitivity Index as discussed by the authors was proposed as a method for determining the sensitivity of people to noise in new neighborhoods before moving into new neighborhoods and seeking out quiet dwelling places, and it was shown that approximately 1 in 5 people are acutely sensitive to moderately loud noise disturbances.
Abstract: People respond differently to different noise levels. Approximately 1 in 5 people are acutely sensitive to moderately loud noise disturbances. This article presents the Weinstein Noise Sensitivity Index as a method for determining noise sensitivity. People who are more sensitive to noise may want to research the noise levels of new neighborhoods before moving into them and seek out quiet dwelling places.
15 citations
Patent•
27 Apr 2004
TL;DR: In this article, a noise reduction headphone set is described, which includes a first circuit system consisting of a microphone for detecting external noise, and means for admitting a wave opposite phase to that of said noise, right and left speakers coupled to the first circuit and variable control means for manually controlling the output of said speakers; an infrared transmitter and a radio circuit system coupled to said transmitter for transmitting an external audio signal switchably coupled to first circuit whereby signals generated by said first and second circuits cancel external noise selectively.
Abstract: A noise reduction headphone set has been described. The headphone set includes a first circuit system being an anti-noise circuit comprising a microphone for detecting external noise, and means for admitting a wave opposite phase to that of said noise, right and left speakers coupled to said first circuit and variable control means for manually controlling the output of said speakers; an infrared transmitter and a radio circuit system coupled to said transmitter for transmitting an external audio signal switchably coupled to said first circuit whereby signals generated by said first and second circuits cancel external noise, selectively; and power auto/off control circuit coupled to said first and second circuits for shutting down said system in the absence of an audio signal for a predetermined period of time.
15 citations
TL;DR: A high-performance audio fingerprinting system used in real-world query-by-example applications for acoustic audio-based content identification, especially for use in heterogeneous portable consumer devices or on-line audio distributed system is proposed.
Abstract: In this paper, we propose a high-performance audio fingerprinting system used in real-world query-by-example applications for acoustic audio-based content identification, especially for use in heterogeneous portable consumer devices or on-line audio distributed system. In the proposed method, audio fingerprints are generated using a modulated complex lapped transform-based non-repeating foreground audio extraction and an adaptive thresholding method for prominent peak detection. Effective matching is performed using a robust peak-pair-based hash function of non-repeating foreground audio to protect against noise, echo, artifacts from pitch-shifting, time-stretching, resampling, equalization, or compression. Experimental results confirm that the proposed method is quite robust in various distorted conditions and achieves preliminarily promising accuracy results.
15 citations
19 Oct 1997
TL;DR: This paper deals with broadband noise reduction for the restoration of audio recordings using the short-time Fourier transform using a method based on non-linear spectral subtraction for over-subtraction of the degraded signal spectrum.
Abstract: This paper deals with broadband noise reduction for the restoration of audio recordings. The signals are processed in the frequency domain using the short-time Fourier transform. A method based on non-linear spectral subtraction is presented. To prevent the annoying phenomenon of musical noise which is caused by the noise suppression process, over-subtraction is applied to the degraded signal spectrum. This means that depending on the estimated signal-to-noise ratio (SNR) more than the average noise spectrum is subtracted. A masking threshold obtained by spectral smoothing of the degraded signal spectrum is used to determine the SNR. Furthermore, time-averaging is applied to the SNR. The averaging procedures in the time and frequency domain reduce the SNR variance. Therefore, audible processing distortions are reduced, too.
15 citations