Real-time audio detection and regeneration of moving sound source based on optical flow algorithm of laser speckle images

N Wu, S Haruyama - Optics Express, 2020 - opg.optica.org
Sound detection with optical means is an appealing research topic. In this manuscript, we
proposed a laser microphone system allowing simultaneous detection and regeneration of …

The 20k samples-per-second real time detection of acoustic vibration based on displacement estimation of one-dimensional laser speckle images

N Wu, S Haruyama - Sensors, 2021 - mdpi.com
Audio signal acquisition using a laser speckle image is an appealing topic since it provides
an accurate and non-contact solution for vibration measurement. However, due to the …

A speech enhancement algorithm for speech reconstruction based on laser speckle images

X Hao, D Zhu, X Wang, L Yang, H Zeng - Sensors, 2022 - mdpi.com
In the optical system for reconstructing speech signals based on laser speckle images, the
resonance between the sound source and nearby objects leads to frequency response …

Real-time high sensibility vibration detection based on phase correlation of line speckle patterns

X Huang, W Guo, R Yu, X Wang - Optics & Laser Technology, 2022 - Elsevier
A vibration extraction system based on laser speckle with phase correlation method is
presented. The speckle pattern sequences are recorded by a linear array CMOS, which …

Sound recovery via intensity variations of speckle pattern pixels selected with variance-based method

G Zhu, XR Yao, P Qiu, W Mahmood, WK Yu… - Optical …, 2018 - spiedigitallibrary.org
In general, the sound waves can cause the vibration of the objects that are encountered in
the traveling path. If we make a laser beam illuminate the rough surface of an object, it will …

Vibration measurement by means of digital speckle correlation

L Li, FA Gubarev, MS Klenovskii… - … Siberian Conference on …, 2016 - ieeexplore.ieee.org
Vibration measurement by means of digital speckle correlation Page 1 2016 International
Siberian Conference on Control and Communications (SIBCON) 978-1-4673-8383-7/16/$31.00 …

Audio signal extraction and enhancement based on cnn from laser speckles

C Liu, L Li, X Huang, X Wang… - IEEE Photonics Journal, 2021 - ieeexplore.ieee.org
A micro vibration signal extraction method based on deep neural network is proposed.
Rough surface of vibrating object modulates the illuminating laser wave front and generates …

A noise-robust vibration signal extraction method utilizing intensity optical flow

M Shan, X Xiong, J Wang, M Dang, X Zhou, L Liang… - Measurement, 2024 - Elsevier
A noise-robust intensity optical flow (IOF) method was developed by leveraging the linear
relationship between the vibrating displacement and optical intensity variation. By identifying …

Extreme detectable vibration frequency limited by rolling shutter camera imaging of laser speckles

H Hong, J Liang, L Deng, W Guo, X Wang - Optics Letters, 2023 - opg.optica.org
The row scanning mechanism of a rolling shutter camera can be used to infer high-
frequency information from a low-frame-rate video. Combining the high intensity of laser …

Audio signal detection and enhancement based on linear CMOS array and multi-channel data fusion

C Dai, C Liu, Y Wu, X Wang, H Fu, H Sun - IEEE Access, 2020 - ieeexplore.ieee.org
An audio signal detection system based on laser speckle and multi-channel data fusion is
presented. A linear CMOS array is used as the detector, which owns a fast line rate and …