51–60 of 158 posts
Hey Artlav, when did you start posting on ribbonfarm? I used to subscribe to it, but unsubscribed a couple years back after Rao wrote a dumb post on information security.
you mean a $10 EZ-USB FX2LP dongle?
You might be interested in this https://sourceforge.net/p/manyears/wiki/Main_Page/
Im sure you know about SeeSV-S205, its basically the same thing, but polished and packaged neatly for FAT commercial customers ($30K).
posted on slashdot in 2013 about the same thing https://tech.slashdot.org/comments.pl?sid=3742015&cid=437167...
>Unfortunately, we are still talking about a total of 64 Mbps of data. That needs a USB 2.0 sampling board that would pull the data out of the cells over the bulk interface you mean a $10 EZ-USB FX2LP dongle? You might be interested in this https://sourceforge.net/p/manyears/wiki/Main_Page/ Im sure you know about SeeSV-S205, its basically the same thing, but polished and packaged neatly for FAT commercial customers (…
Shouldn't 3 mics be somewhat sufficient for intermediate values as well? More mics => more redundancy => clearer image of the waves, but why do the pixels/blobs "snap" to a microphone?
edit: ah, he does not use timing (at 10fps obviously not) but needs continuous sound to see the wave pattern across the array...
edit 2: so do these gunfire locators¹ only time stamp impulses? Or do they do continuous analysis? With natural, irregular sound, it should be possible to match and measure the delay between mics, no?
edit 3: the gunfire locators would need to analyze for gunfire characteristics anyways, to weed out false positives, but that could be separated from the locating.
edit x: oh cool, if you zoom out of the final picture so it's smaller on screen, you can even see some parallax effect happening: http://206hwf3fj4w52u3br03fi242.wpengine.netdna-cdn.com/wp-c...
¹ http://wordpress.mrreid.org/wp-content/uploads/2013/06/boome...
https://www.newscientist.com/article/mg21929364-400-matchsti...
This would be pretty powerful if you combine it with speech recognition. If you put this array in the middle of a crowded room, can you better tease apart different audio sources?
Earlier quoted context omitted.
Well as it happens there are special sonar cameras out there capable of providing real-time video images[0][1]. The use case here is being able for a diver or ROV to see in murky water [0] http://www.soundmetrics.com/image-gallery [1] http://www.apl.washington.edu/programs/z_DIDSON/Pages/LIMIS....
Not quite the same thing though. These systems are active. They have sound being produces most likely at a very specific frequency and then listened for so that depth information can be gathered. This instead images the sound that's already out there in the light. It's the difference between lidar and a camera
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?
http://www.npr.org/programs/invisibilia/378577902/how-to-bec...
