Re: [PD] Measuring position between two microphones?

Another thought... When you have the two microphones, just correlate the noise between the two channels (not from the output/input1 and output/input2, but between input1/input2). When the speaker is equidistant from each microphone the delay is 0 (located at exactly half a block on the output from sxcov~.pd or sxcorr~.pd). Then, the distance from the center is simply proportional to the measured delay between the signals, divided by 2. e.g. at 44100 kHz, given c=343 m/sec distance from center=(delay in samples)/2/44100*343, meters

and the resolution is about 4 mm

noted difference: sxcorr~ accumulates it's values over time, so that you can get more accuracy, from using longer signals sxcov~ is instantaneous and not accumulated

Chuck