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.
Papers published on a yearly basis
Papers
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Patent•
16 Feb 1988
TL;DR: In this article, an impulse-noise suppression system consisting of a preliminary blanking gate adapted for connecting to and for interrupting the AM-modulated signal path at the input of the IF section is described.
Abstract: To a standard AM radio receiver there is connected an impulse-noise suppression system comprising a preliminary blanking gate adapted for connecting to and for interrupting the AM-modulated signal path at the input of the IF section, and an audio blanking gate adapted for interrupting the audio circuit. Both blanking circuits detect impulse noise at the RF amplifier and with appropriate delays blank both points. Audio blanking masks the audio disturbance caused by the blanking in the AM-modulated-signal path. Audio blanking time is preferably from 2 to 3 times the duration of the blanking of the AM-modulated-signal path and is thus kept very short causing a minimum interruption of the wanted audio signal. Associated with the audio-signal-path blanking circuit is a sample and hold circuit for smoothing the blanked audio signal and virtually eliminating an audio disturbance or noise that is otherwise generated by the audio blanking circuit itself.
23 citations
TL;DR: The model which is presented as one of the solutions is based on two stages of operation with the first stage based on the ALE (Adaptive Line Enhancer) filters and the second stage on NLMS (Normalized Least Mean Square) filter.
Abstract: The basic theme of our paper is to implement a new idea of noise reduction in the real time applications using the concepts of adaptive filters. Our model which is presented as one of the solutions is based on two stages of operation with the first stage based on the ALE (Adaptive Line Enhancer) filters and the second stage on NLMS (Normalized Least Mean Square) filter. The first stage reduces the sinusoidal noise from the input signal and the second stage reduces the wideband noise. Two input sources of voice are used; one for the normal speech and the other for the noise input, using separate microphones for both signals. The first signal is of the corrupted speech signal and the second signal is of only the noise containing both wideband and narrowband noise. In the first stage the narrowband noise is reduced by using the ALE technique. The second stage gets a signal with ideally only the wideband noise which is reduced using the NLMS technique. In both the stages the concerned algorithms are used to update the filter coefficients in such a way that the noise is cancelled out from the signal and a clean speech signal is heard at the output. DOI: http://dx.doi.org/10.11591/ijece.v2i3.246
23 citations
Journal Article•
23 citations
14 Mar 2010
TL;DR: A noise level estimator using minimal values of the Short Time Fourier Transform of a signal embedded in a white Gaussian noise to estimate the variance of the noise without any a priori knowledge on the signal.
Abstract: In this paper we present a noise level estimator using minimal values of the Short Time Fourier Transform of a signal embedded in a white Gaussian noise. The spectral kurtosis of the smallest values is used to estimate the variance of the noise without any a priori knowledge on the signal. This estimation is illustrated on both a synthetic and speech signal. A dolphin whistle detection in underwater noise is given as an application.
23 citations
Patent•
30 Apr 2014
TL;DR: In this paper, the authors present a method and a device for controlling audio output volume in a playing device, which includes the following steps that the comfortable volume of a current user is obtained; playing environment information of the playing device is obtained, and the output volume of the audio to be played is determined based on the playing environment and the comfortable volumes of the user.
Abstract: The invention aims at providing a method and a device for controlling audio output volume in a playing device. The method includes the following steps that the comfortable volume of a current user is obtained; playing environment information of the playing device is obtained; the output volume of the audio to be played is determined based on the playing environment information and the comfortable volume of the user, and the audio to be played is played. The method and the device have the advantage that by obtaining the comfortable volume selected by the user, the output volume of the audio to be played is determined based on the comfortable volume of the user, and the user can hear the audio with the comfortable volume, noise in the current environment and effects of distance between the user and the playing device on the output volume can be determined, corresponding adjustment is conducted on the volume of the audio to be played, and the user can hear the audio to be played clearly.
23 citations