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Old 18th April 2010
Gear Maniac


Originally Posted by MichaelPatrick View Post
Tones in that range should be fairly easy to locate unless they somehow radiate broadly through an air cavity or a solid medium like a wall.
Indeed, sadly the location allows a lot of reflection, making it very difficult to spot even with a directional mic and a dish...

Originally Posted by MichaelPatrick View Post
I'm just curious why you don't know what it is after isolating it.
As i said, all i can spot on the spectrograph is a huge, constant peak at 3.6 Khz and there's not much more i can do with that - there are no variations r detail that could point me to one or the other device specifically.

Originally Posted by j-uk
Smoke or gas alarm running out of battery.
That's something i already thought about - very likely also after searching the net for 3.6KHz: in the first hundred google results i've found a gazillion types of piezo buzzers designed for that frequency and 90db SPL...(which given the maximum possible distance to the source seems to be just an on-the-spot result from google, for once )

Anyway, i've been hearing it all night and i'm getting coucou right now, next step is a police complaint - and i've never been fond of the police.

Originally Posted by Jay Lee View Post
Aliens. heh
If only :D