Results 241 to 250 of about 777,330 (303)

A Novel Adaptive Reverberation Suppression Method for Moving Active Sonar

IEEE/OES China Ocean Acoustics, 2021
Reverberation is one of the main interferences for the active sonar in a shallow sea and seriously affects the detection performance. For the moving sonar system, the motion of the active sonar platform will cause the reverberation in different azimuths ...
Z. Yuxuan, C. Shijin, Hao Chengpeng
exaly   +2 more sources

Reverberation suppression for detecting underwater moving target based on robust autoencoder

Applied Acoustics, 2023
Zhongchang Song, Wuyi Yang, Hongquan Li   +2 more
exaly   +2 more sources

Reverberation Suppression Using Wideband Doppler-Sensitive Pulses

IEEE Journal of Oceanic Engineering, 2008
The influence of transmitted waveforms on the signal-to-reverberation ratio (SRR) of a low-frequency active sonar is analyzed both theoretically and experimentally. Reverberation experiments have been conducted during a sea trial in a littoral water environment in October 1999.
Doisy, Y, Deruaz, L., IJsselmuide, S.P. van, Beerens, S.P., Been, R.   +4 more
openaire   +3 more sources

Low-Complexity Adaptive Beamformer for Joint Reverberation and Noise Suppression

2024 Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)
Reverberation and background noise can severely affect the quality and intelligibility of recorded speech, potentially impairing speech communication and human-machine interaction systems. The minimum variance distortionless response (MVDR) beamformer is
Fan Zhang 0001, Chao Pan 0001, Jingdong Chen, Jacob Benesty   +3 more
openaire   +2 more sources

Multi-scale attention-based spectral neural network for underwater reverberation suppression

Measurement: Journal of the International Measurement Confederation
Zhiqiang Wei, Qiao Hu
exaly   +2 more sources

A Reverberation Suppression Method Using Angle-Delay-Doppler Deconvolution

2023 6th International Conference on Information Communication and Signal Processing (ICICSP), 2023
Much attention is attracted to the detection for the low-speed small target in a reverberation-limited environment. Exploiting the energy distribution differences between the target's echo and the reverberations (i.e., the bottom and the surface ...
Yacong Zhao, Jiahao Fan, Xionghou Liu, Yixin Yang, Chao Sun   +4 more
semanticscholar   +1 more source

Perceptually-motivated selective suppression of late reverberation

2009 16th International Conference on Digital Signal Processing, 2009
An improved spectral subtraction algorithm for suppressing late reverberation is presented. Existing spectral subtraction methods, process similarly all frames of the reverberant speech signal. This work introduces two criteria for the identification of the speech frames that do not contain significant late reverberation power.
Alexandros Tsilfidis, John Mourjopoulos
openaire   +1 more source

Suppression of reverberations at fiber tips for optical ultrasound sensing

Optics Letters, 2020
Fabry–Perot-based ultrasound sensors at fiber tips have performed high sensitivity and immunity of electromagnetic interference with a relatively compact size. Nevertheless, the reverberation at fiber tips causes a strong noise that degrades the sensing capability.
Xiangdong Ma, Bingxue Liu, Yiqi Cai, Donglin Jia, Bo Fu, Lijun Xu, Jianguo Ma   +6 more
openaire   +2 more sources

Blind single-channel suppression of late reverberation based on perceptual reverberation modeling

The Journal of the Acoustical Society of America, 2011
A blind method for suppressing late reverberation from speech and audio signals is presented. The proposed technique operates both on the spectral and on the sub-band domains employing a single input channel. At first, a preliminary rough clean signal estimation is required and for this, any standard technique may be applied; however here the estimate ...
Alexandros, Tsilfidis, John, Mourjopoulos   +1 more
openaire   +2 more sources

Geometric comb waveforms for reverberation suppression

Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers, 2002
The major problem for sonar systems operating in shallow water is reverberation from the ocean bottom. A new class of waveforms is described which combines high range resolution with excellent Doppler properties for detecting moving targets in stationary reverberation. The waveforms consist of multiple simultaneously transmitted CW tone pulses.
H. Cox, null Hung Lai
openaire   +1 more source