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+--- Thread: Additional detection of sound? (/showthread.php?tid=3141)
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Additional detection of sound? - pe1chl - 2020-01-31
Has it ever been considered to add additional detection of sound to the system, or maybe to have a different (simpler) system that can be used to detect the origin of loud sounds?
As sound travels a lot slower than light, it would likely be sufficient to have an NTP-synced clock instead of a local GPS receiver. But of course it never hurts to have it.
However, to have useful use of such a detection it needs more stations than the lightning detection system currently has.
Still, much of the basic principles would be the same, so maybe it could be done as an addition or as a second project within Blitzortung.org?
Application: location of the source of explosions, shootings, fireworks etc in a local area.
RE: Additional detection of sound? - mwaters - 2020-01-31
Yes, it has been asked before. However, it would not be practical.
- https://forum.blitzortung.org/showthread.php?tid=1511
- https://forum.blitzortung.org/showthread.php?tid=2949&pid=20724&highlight=Sound#pid20724
- https://forum.blitzortung.org/showthread.php?tid=1517&pid=11514&highlight=Sound#pid11514
RE: Additional detection of sound? - pe1chl - 2020-01-31
Thanks for reply!
I can only read the first article. It appears others are interested as well.
On the 2nd and 3rd link I get error messages (You do not have permission to access this page)
Interesting that the first article mentions the KNMI system.
There recently was a relatively big explosion here and it was recorded on a sensor of the KNMI system but as they do not have many sensors it was not possible to pinpoint the location.
Maybe when there would be sensors within reach of hobbyists it would be possible to get enough coverage for that...
Also in the current local news there is the discussion about the ban on consumer fireworks and the impossibility of efficiently finding the illegal users of fireworks. A locating system would help there.
RE: Additional detection of sound? - mwaters - 2020-01-31
This network is about detecting lightning, and always will be.
Infra sound detection has been discussed, but it is not very useful for fast detection, and you would have to have a very high density of stations for that to work. Besides, all of the Blitzortung lightning receivers ever made have no provision for the detection of sound.
As for shooting and fireworks (illegal or not) ... nope. Ain't gonna happen.
RE: Additional detection of sound? - kevinmcc - 2020-02-03
(2020-01-31, 09:43)pe1chl Wrote: Has it ever been considered to add additional detection of sound to the system, or maybe to have a different (simpler) system that can be used to detect the origin of loud sounds?
As sound travels a lot slower than light, it would likely be sufficient to have an NTP-synced clock instead of a local GPS receiver. But of course it never hurts to have it.
However, to have useful use of such a detection it needs more stations than the lightning detection system currently has.
Still, much of the basic principles would be the same, so maybe it could be done as an addition or as a second project within Blitzortung.org?
Application: location of the source of explosions, shootings, fireworks etc in a local area.
You may want to check out the Raspberry Boom project.
https://raspberryshake.org/products/raspberry-boom/
RE: Additional detection of sound? - pe1chl - 2020-02-03
(2020-02-03, 05:42)kevinmcc Wrote: You may want to check out the Raspberry Boom project.
https://raspberryshake.org/products/raspberry-boom/
Ah that is what I was looking for!
This is the type of device I would like to use.
It looks like they need to do a lot more work on the server side of things to make it more like lightningmaps.org but at least there is a project so maybe I could contribute to that.
Thanks for the information!
RE: Additional detection of sound? - mwaters - 2020-02-03
That's pretty interesting, Kevin! I have always wanted to build a seismograph.
But this can do much more than just detect the earth shaking. And it ought to, for those prices.
RE: Additional detection of sound? - kevinmcc - 2020-02-05
(2020-02-03, 15:20).mwaters Wrote: That's pretty interesting, Kevin! I have always wanted to build a seismograph.
But this can do much more than just detect the earth shaking. And it ought to, for those prices.
I have two of their Seismographs, a 1D and a 4D.
One in my house in Illinois and one in my mother's house in Iowa about 60 miles away.
They are very sensitive and work.
If you want one, I'd get the 1D unless you live in areas like Central California or Japan.
The 4D costs $160 more, due to the 3 large movement sensors which are only useful if you live in a very active area like Central California or Japan.
The 1D costs $215 which includes every thing you need other than Raspberry Pi and power supply.
The case is a must have in my opinion and very well made.
RE: Additional detection of sound? - pe1chl - 2020-02-05
Do they have some TDOA/location-on-map software available?
Browsing the site it appears they only have local data for each site, no location of the source, is that correct?
RE: Additional detection of sound? - mwaters - 2020-02-05
I saw that they have a mobile app, but I know nothing about it.