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Microphone Camera

A 6x5 matrix of microphones - making sound visible

I saw an article on hackaday.com/blog, where photodiodes arranged in a matrix where used as a camera. Within the comments I wrote that it would be cool to have a microphone array to see the sound. I've imagined something like the thermal imaging module where the input was laid over the camera picture [see link 2], To get things started I thought about having a box with tubes where the microphones are in (crude unidirectional micro) and scan them and display the gain values as a grayscale matrix. I will leave some space in the middle of the box to place a camera to later combine the "images". There will be probably some math about camera angles vs. distance or angles of the microphones etc. inspired by: - http://hackaday.com/2015/04/18/self-powered-camera-powers-itself/ - http://hackaday.com/2012/11/12/building-a-thermal-imaging-sensor-from-scratch/