Results 11 to 20 of about 7,499 (273)
Model-based optimal action selection for Dyna-Q reverberation suppression cognitive sonar [PDF]
EURASIP Journal on Advances in Signal Processing, 2023 The Doppler shift of low-speed targets is frequently disturbed by the reverberation Doppler spread clutter under the shallow sea. The clutter is generated by underwater scatterers, which increases the difficulty of Doppler estimation.
Yubin Fu +4 more
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Reverberation Suppression in Echocardiography Using a Causal Convolutional Neural Network [PDF]
IEEE Access, 2023 While ultrasound imaging has seen vast technical advances over the last decades, trans-thoracic echocardiography still suffers from image quality degradation caused by acoustic interaction with inhomogeneous tissue layers between the transducer and the ...
Tollef Struksnes Jahren +5 more
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Electronic Suppression of Reverberation [PDF]
The Journal of the Acoustical Society of America, 1967 Several 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.
Manfred R. Schroeder
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Linear Frequency Modulated Reverberation Suppression Using Non-Negative Matrix Factorization Methods, Dechirping Transformation and Modulo Operation [PDF]
IEEE Access, 2020 In this study, we propose a reverberation suppression algorithm for linear frequency-modulated (LFM) pulse sonar systems using a non-negative matrix factorization (NMF) method.
Geunhwan Kim, Kyunkyung Lee, Seokjin Lee
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Underwater Reverberation Suppression via Attention and Cepstrum Analysis-Guided Network [PDF]
Journal of Marine Science and Engineering, 2023 Active sonar systems are one of the most commonly used acoustic devices for underwater equipment. They use observed signals, which mainly include target echo signals and reverberation, to detect, track, and locate underwater targets. Reverberation is the
Yukun Hao +6 more
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Research on reverberation characteristics analysis and suppression methods for active continuous detection [PDF]
MATEC Web of Conferences, 2019 Compared with the traditional active detection with monopulse periodic emission mode, active continuous detection has the advantages of large emission duty ratio and continuous acquisition of process information.
Chen Tuo, Ma Qiming, Zhou Zheyuan, Lu He
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Reverberation characterization and suppression in the presence of channel spreading [PDF]
The Journal of the Acoustical Society of America, 1994 In active sonar, the reverberation plus target time series can be modeled as the joint convolution of the signal with the channel and scatterer impulse responses. Especially in shallow water, the channel response cannot be adequately modeled as propagation over discrete paths.
Geoffrey S. Edelson, Ivars Kirsteins
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Suppression of reverberation artifact by subtraction imaging [PDF]
The Journal of the Acoustical Society of America, 1990 Reverberations in ultrasound pulse-echo signals are the result of parallel specular reflectors that are perpendicular to the incident sound beam. The multiple reflections within the space between the reflectors cause a decaying pulse train of echoes to be superimposed on the returned echoes due to other structures. In a medical ultrasound B-scan, these
Terry A. Kling, K. Kirk Shung
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Frequency dependent statistical model for the suppression of late reverberations [PDF]
Sensor Signal Processing for Defence (SSPD 2012), 2012 Suppression of late reverberations is a challenging problem in reverberant speech enhancement. A promising recent approach to this problem is to apply a spectral subtraction mask to the spectrum of the reverberant speech, where the spectral variance of the late reverberations was estimated based on a frequency independent statistical model of the decay
Tariqullah Jan, Wenwu Wang
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Late reverberation suppression using U-nets
, 2021 In real-world settings, speech signals are almost always affected by reverberation produced by the working environment; these corrupted signals need to be \emph{dereverberated} prior to performing, e.g., speech recognition, speech-to-text conversion, compression, or general audio enhancement.
Diego León, Felipe Tobar
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