3 ms·
You could start with two mics going into the same computer. Even a few feet of separation might be sufficient. Plug them into a mixer, one as the left channel a
by jjwiseman 9y ago
You could start with two mics going into the same computer. Even a few feet of separation might be sufficient. Plug them into a mixer, one as the left channel and the other as the right channel of a stereo stream to keep their samples synchronized. Filter, then cross correlate the signals to find the phase difference/TDOA.
- blunte 9y agoSince low frequency waves have a very long period, I don't think any mics near each other would give much useful location info. Depending on where a given mic was relative to the wave, I expect the recorded volume would be very different.
- jjwiseman 9y agoYeah, 20 Hz = 17 m wavelength, so move the microphones to be at least 17 meters apart, or a bit more if you think the sound is below 20 Hz, which should be doable. And yes, I don't expect comparing amplitude to be useful--sound localization almost always uses TDOA/phase difference for that reason.