ArticleSensors (Basel, Switzerland)2021
The 20k Samples-Per-Second Real Time Detection of Acoustic Vibration Based on Displacement Estimation of One-Dimensional Laser Speckle Images.
Article in Sensors (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Deep Learning-Based Simultaneous Temperature- and Curvature-Sensitive Scatterplot Recognition.Sensors (Basel, Switzerland) · 2024Article
- Spatially Multiplexed Speckle on 1D Sensors for High-Speed 2D Sensing Applications.Sensors (Basel, Switzerland) · 2024Article
- A Speech Enhancement Algorithm for Speech Reconstruction Based on Laser Speckle Images.Sensors (Basel, Switzerland) · 2022Article
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2 authors.
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Abstract
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 limitation of camera frame rate and image processing speed, previous research could not achieve real time reconstruction of an audio signal. In this manuscript, we use a one-dimensional laser speckle image to measure the acoustic vibration of sound source and propose a fast and sub-pixel accuracy algorithm to estimate the displacement of captured one-dimensional laser speckle images. Compared with previous research, the proposed method is faster and more accurate in displacement estimation. Owing to this, the frequency bandwidth and the robustness are significantly increased. Experiment results show that the proposed system can achieve 20k samples-per-second sampling rate, and the audio signal can be reconstructed with high quality in real time.
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