Visual microphone based on computational imaging

The detection of sounds employing optical techniques is a captivating and profoundly significant area of research. Here, we propose an optical microphone scheme based on single-pixel imaging. This scheme has a simple structure, low-cost, and eliminates the need for coherent light illumination. We experimentally validated this framework by using everyday items, such as paper cards and leaves, successfully detecting minute vibrations on their surfaces induced by sound waves. Another key advantage of this method is its minimal data volume, allowing for long-duration or even continuous measurements.