I thought detecting sound direction would be easier than what different projects imply. So far it seems I was right. People have used multiple microphone arrays, people have measured sound pressure and calibrated their sound detectors and whatnot. All I wanted to do was using two microphones and de…

There are so many variables here. Is the sound clearly characterised - like a "click" (the way bats do echolocation?) Is the sound level reasonably predictable? What sort of waveform do you expect - how much information is the sound carrying? Detecting the direction of a click is REASONABLY easy…

[image] johnerrington: What sort of waveform do you expect Any waveform. It goes like this: [Screenshot_20231024_103251_Samsung Notes] The left and right mics record their own sounds. I match the wave patterns with each other and measure the time difference. The more clear the original sou…

[image] Johan_Ha: Don't they collect the sound that hits your outer ear into one single sound signal? Depends on how you define single and signal… When I was younger (decades ago) i did research on speech recognition and sound synthesis. Spent quite some time studying the literature and kept…

[image] J-M-L: So I don’t think it compares to two microphones and an arduino... But that still has nothing to do with determining the direction with the help of thousands of hair cells. A single hair cell reads one very narrow frequency band from the incoming audio signal, a signal, which co…

Here's my next test. I still sample at 16 kHz and the microphones are 42 mm apart from each other, which would give me those 5 sectors. But now I've done some interpolation to make the recorded samples 4 times bigger. It's like sampling at 64 kHz. But of course it's not real. Interpolation is not ad…

[image] Johan_Ha: Two mics and an Arduino can determine the direction of the sound, like a human with two ears. I don't disagree with the first part. Yes you can to some extent. I just disagree with the "like a human with two ears". My comment was related to the information that your brain …

[image] J-M-L: When I was younger (decades ago) i did research on speech recognition and sound synthesis. Spent quite some time studying the literature and kept an interest in this. If you haven't kept up with more recent studies on sound direction localization, I highly recommend reading up …

thx seems fascinating EDIT - that was a good read. thanks for sharing

One of the most astounding things I recall from that lecture is that barn owls can accurately locate, by hearing alone, a mouse moving underneath something like 30 cm of snow. So a single dive often results in dinner.

[image] J-M-L: it's in parallel from tens of thousands sensor on tens of thousands "information bus". it's basically heavily parrelized with tons of data. You make it sound like it's some extraordinary special organ with these tens of thousands of sensors, when a mic is just one. But it reall…

Detecting direction of sound

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Detecting direction of sound

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