121–130 of 158 posts
This is insanely cool. I've often vaguely fantasized about stuff like this but this guy takes it all the way. He deserves a huge budget. Can we fund this somehow?
The address is on my Orbital Designs site - http://orbides.org/
This is insanely cool. I've often vaguely fantasized about stuff like this but this guy takes it all the way. He deserves a huge budget. Can we fund this somehow?
A fund that hackers can apply to for building cool projects is an interesting idea though (to the extend that I'm sure one already exists).
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Not exactly unheard of, but quite rare. I found a company that made large arrays like that, but they seem to operate in near field, measuring only the sound volume. Imagine a wall of microphones next to a truck - you can tell which part of the wheel makes the sound. That sort of stuff. As for an actual "camera" that turns sound into an image - i've never heard of one.
Isn't this exactly what sonar does? SOund Navigation And Ranging: https://en.m.wikipedia.org/wiki/Sonar
For my undergraduate project years ago I built a microphone array that could be used to locate noisy objects. I demonstrated it by tracking aircraft taking off at a local airport.
Whilst I didn't make 'acoustic photos' with it, I did plot the flight track of the aircraft in real time, and could have a decent crack at identifying it based on frequency content.
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You seriously need to consider starting a Patreon[0] campaign. I'm sure many people would be interested to see more from you. There are individuals on there who are making significant salaries based purely on interest from the crowd. [0] https://www.patreon.com/
Don't that require making regular content? My posts are fairly random by time and quality, and most are just rants on various philosophical nonsense [0] or game design [1]. Wouldn't be fair to people who signed up for something like this camera. [0] http://orbides.org/random.php [1] http://orbides.org/randg.php
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Isn't this exactly what sonar does? SOund Navigation And Ranging: https://en.m.wikipedia.org/wiki/Sonar
Not exactly. A sonar maps a surface using sound, while my camera looks at the sound itself. Think laser rangefinder on a scanner platform vs a camera.
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Isn't this exactly what sonar does? SOund Navigation And Ranging: https://en.m.wikipedia.org/wiki/Sonar
Sonar sends out sound and then listens for the echoes though, rather than just take in sound from other sources.
Beam-forming microphones are well known. Here's a fancy ceiling-mounted one for video conferencing.[1] Here's the theory in Matlab.[2] And, most impressive is the surveillance version, the Squarehead Audioscope Acoustic Camera.[3] This, a 1m disk with 384 microphones, can pick out a single conversation in a noisy arena. There's a version which records all the audio channels in real time, using a big disk array. This…
The system worked in real time but also stored all the raw data so it could be processed again later if you wanted. I also had some fun trying to identify the aircraft based on frequency content and details on engine speeds / blade counts from Type Certificates.
Beam-forming microphones are well known. Here's a fancy ceiling-mounted one for video conferencing.[1] Here's the theory in Matlab.[2] And, most impressive is the surveillance version, the Squarehead Audioscope Acoustic Camera.[3] This, a 1m disk with 384 microphones, can pick out a single conversation in a noisy arena. There's a version which records all the audio channels in real time, using a big disk array. This…
Beam-forming microphones are well known. Here's a fancy ceiling-mounted one for video conferencing.[1] Here's the theory in Matlab.[2] And, most impressive is the surveillance version, the Squarehead Audioscope Acoustic Camera.[3] This, a 1m disk with 384 microphones, can pick out a single conversation in a noisy arena. There's a version which records all the audio channels in real time, using a big disk array. This…
My laptop has a beamforming microphone array. The interesting part of the linked project is that you can literally see objects using homemade stuff. Well homemade except for the printed circuit board :)