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Reverberation Suppression and Modeling
1993We apply the Principal Component Inverse (PCI) method of rapidly adaptive interference suppression and signal detection to reverberation suppression and modeling. We present preliminary results for the challenging example in which the transmitted pulse is a two-second burst of hyperbolic frequency-modulated (HFM) sinusoid sweeping from 210 Hz to 280 Hz.
D. W. Tufts, D. H. Kil, R. R. Slater
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Suppression of oceanic reverberation by subspace methods
The Journal of the Acoustical Society of America, 2008Acoustic signal processing in shallow water environments is a challenging problem because of the presence of reverberation. Based on some models of reverberation, data from sensors array is pretreated to suppress reverberation. Considering reverberation as a sum of echoes of transmitted signal, the principal component inverse (PCI) algorithm deletes ...
Xuan Li, Xiaochuan Ma, Chaohuan Hou
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Perceptually-motivated selective suppression of late reverberation
2009 16th International Conference on Digital Signal Processing, 2009An 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
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Reverberation Suppression Using Wideband Doppler-Sensitive Pulses
IEEE Journal of Oceanic Engineering, 2008The 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 +4 more
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Electronic Suppression of Reverberation
The Journal of the Acoustical Society of America, 1967Several methods for electronic processing of reverberant sound signals to suppress echoes and reverberation are discussed. Potential applications of these methods in sound reinforcement, conference telephony, and underwater speech communication are described. The implications of a recently proposed self-adaptive echo canceler [M. M. Sondhi, J.
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Methods for reverberation suppression utilizing dual frequency band imaging
The Journal of the Acoustical Society of America, 2013Reverberations impair the contrast resolution of diagnostic ultrasound images. Tissue harmonic imaging is a common method to reduce these artifacts, but does not remove all reverberations. Dual frequency band imaging (DBI), utilizing a low frequency pulse which manipulates propagation of the high frequency imaging pulse, has been proposed earlier for ...
Jochen M, Rau +4 more
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The STAP Method for Moving Sonar Reverberation Suppression
Applied Mechanics and Materials, 2015The theory of full dimension and reduced dimension STAP was introduced. Based on the physical mechanism of reverberation formation, the suppression of moving sonar reverberation and the possibility of improvement of detection performance were analyzed and discussed, and the solutions of several key steps were given.
S.D. Zhao, Kun Yan, T.Z. Zhou
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Study on robust space-time adaptive reverberation suppressing
IEEE 10th INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING PROCEEDINGS, 2010Reverberation covariance matrix is singular matrix owing to limited sample obtained by active sonar in non-stationarity environment. Basd on which, a robust space-time adaptive method is presented in this paper. The new method avoids singular matrix which aroused by small eigenvalue with diagonal loading.
Zhan Hao-ke, Ma Qu-li, Li Hai-lin
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Suppression of reverberations at fiber tips for optical ultrasound sensing
Optics Letters, 2020Fabry–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 +6 more
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Multi-Level Binary SVD for Sonar Reverberation Suppression
2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO), 2018In this paper, a multi-level binary singular value decomposition (MBSVD) algorithm used for reverberation suppression has been proposed. The binary singular value decomposition (BSVD) algorithm can separate the target echo from the strong reverberation.
Li Jiang, Yue Pan, Jiansheng Tang
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