Laser Doppler vibrometer for real-time speech-signal acquirement

Shang, Jianhua; He, Yabai; Liu, Dan; Zang, Hang; Chen, Weibiao

doi:10.3788/col20090708.0732

Cited by 26 publications

(3 citation statements)

References 3 publications

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“…In the research of non-contact speech signal detection, laser Doppler speech detection technology was proposed [5]. This optical speech detection technology has a good performance in long-distance speech detection [6]. Nevertheless, it is susceptible to environmental influences such as temperature.…”

Section: Introductionmentioning

confidence: 99%

Non-Contact Speech Recovery Technology Using a 24 GHz Portable Auditory Radar and Webcam

Hong

et al. 2020

Remote Sensing

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Language has been one of the most effective ways of human communication and information exchange. To solve the problem of non-contact robust speech recognition, recovery, and surveillance, this paper presents a speech recovery technology based on a 24 GHz portable auditory radar and webcam. The continuous-wave auditory radar is utilized to extract the vocal vibration signal, and the webcam is used to obtain the fitted formant frequency. The traditional formant speech synthesizer is selected to synthesize and recover speech, using the vocal vibration signal as the sound source excitation and the fitted formant frequency as the vocal tract resonance characteristics. Experiments on reading single English characters and words are carried out. Using microphone records as a reference, the effectiveness of the proposed speech recovery technology is verified. Mean opinion scores show a relatively high consistency between the synthesized speech and original acoustic speech.

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Section: Introductionmentioning

confidence: 99%

Non-Contact Speech Recovery Technology Using a 24 GHz Portable Auditory Radar and Webcam

Hong

et al. 2020

Remote Sensing

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“…Several studies have been conducted on accuracy or resolution improvement of all-fiberoptic heterodyne Doppler measurement systems. 19,[21][22][23] The drift in the frequency shift of an AOFS is primarily a result of the frequency drift of the driving signal and influences the accurate determination of the Doppler frequency shift caused by the moving object, which will also severely reduce deterioration of the performance of all-fiber-optic heterodyne Doppler measurement systems. For displacement measurement, the drift in the frequency shift will lead to a cumulative error during the measurement process, because displacement is obtained by integrating velocity, and errors caused by velocity deviation due to the inaccurate determination of the Doppler frequency shift will be continuously accumulated.…”

Section: Introductionmentioning

confidence: 99%

Nonzero-drift differential all-fiber-optic heterodyne Doppler measurement system

Zhang

Wang

et al. 2019

Opt. Eng.

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To eliminate the serious detrimental effects caused by frequency drifts of acousto-optic frequency shifters (AOFSs) in conventional all-fiber-optic heterodyne Doppler measurement systems, a differential allfiber-optic heterodyne configuration is proposed. By delicate arrangement of the fiber-optic path and using only one AOFS, zero drift, which commonly occurs in conventional systems, is eliminated. Based on the proposed configuration, a differential all-fiber-optic heterodyne Doppler measurement system has been built. Using a piezoelectric ceramic oscillator as the moving object, it has been verified that the proposed system is able to eliminate zero drift, and the displacement and velocity measurement accuracies reach 0.775 μm and 0.009 mm∕s, respectively. It has been shown that the differential all-fiber-optic heterodyne Doppler measurement system can achieve good performance in both displacement and velocity measurements, even in a harsh environment with drastic temperature variation.

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“…通信作者： * wz@aircas.ac.cn 综述 [10] 图 5 线扫描 CCD 远距激光散斑微振动测量［4］ Fig. 5 Remote laser speckle microvibration measurement with linescan CCD [4] 0500007 -4 [29] 综述 8 Schematic diagram of allfiber heterodyne LDV system [33] 图 9 部分光纤 LDV 系统结构图［36］ . (a)电路部分； (b)光路部分 Fig.…”

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激光远距离语音探测技术进展

Rui Xiaobo,

Kong Xinyue,

Li Leixia

et al. 2024

激光与光电子学进展

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Usually, lasers can be used for speech signal detection in noncontact and longdistance scenarios.Consequently, the remote laser speech detection technology has broad application prospects in laser interception, multimode monitoring, intrusion detection, search and rescue operations, laser microphones, and other fields. In this paper, we review research advances in the remote laser speech signal detection technology from the perspectives of remote laser vibration detection systems and detected signal analysis and processing methods; moreover, we expound the future development prospects of this technology.

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Laser Doppler vibrometer for real-time speech-signal acquirement

Cited by 26 publications

References 3 publications

Non-Contact Speech Recovery Technology Using a 24 GHz Portable Auditory Radar and Webcam

Non-Contact Speech Recovery Technology Using a 24 GHz Portable Auditory Radar and Webcam

Nonzero-drift differential all-fiber-optic heterodyne Doppler measurement system

激光远距离语音探测技术进展

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