Blinkies: Open Source Sound-To-Light Conversion Sensors For Large-Scale Acoustic Sensing And Applications
IEEE ACCESS(2020)
摘要
We propose an open source hardware platform called Blinky, a sound-to-light conversion sensor that harvests sound power at low-rate and conveniently. Blinkies are made up of a central processing unit connected to two microphones and a few light-emitting devices, are powered by a battery, and protected by a robust enclosure. Distributed in space and combined with a conventional video camera, they allow to practically sense sound power over a very large area without hassle. We give a comprehensive overview of the proposed system and its potential applications. We describe the hardware design and trade-offs made. We provide a model for the channel between sound power measurements and signal acquired by the video camera. Because each sensor is potentially affected by a different attenuation due to the channel, we propose a calibration procedure to restore the scale of the measurements. The effectiveness of the calibration is validated in an experiment. Finally, we demonstrate sound source localization using a hundred-and-one actual Blinkies in highly reverberent environment.
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关键词
Blinkies, acoustic power sensors, distributed sensing, sound source localization, sound-to-light conversion
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