Audio Detector

Is there some type of electrical component which detects high frequency sounds like those mosquito ring tones? I've looked around and seen things which apparently detect high frequency radio waves, but that isn't really what I want (at least I don't think it is). Thanks in advance.

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guyfrom7up9 years ago
what frequency rang specifically, you might be able to get away with a simple microphone
brickzima (author)  guyfrom7up9 years ago
I'm looking for something that can detect in the 17kHz range. Basically, I want to make something which detects mosquito ring tones and i think those are all in the 17-18kHz range.
Really? I can hear that, it's horrible but easy to hear, my neighbours jsut got one of the special anti-pest things and it goes out at 21khz and is the most horrible noise, at barely any volume but makes me feel like my skull is going to implode... Please tell me the detector is hooked up to a heavily armed seek and destroy robot...
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Don't you just feel crazy when you can hear a really high pitch noise when no one can?
I can hear the tv, my computer, lightbulbs, a lot of things. At first I thought my ears were wrecked and I had tinnitus, but it seems to be manmade...
hmmmm well you can get a mic element from radioshack that can detect up to 15khz. you could have a LED get brighter and brighter the high the pitch with some simple electronics, i think
brickzima (author)  guyfrom7up9 years ago
That could possibly work. Are frequencies in that range common? Like, would I potentially get lots of false alarms if I was trying to only detect those rings? Just for reference, we can say an example use of this device would be in a classroom.
well, human voice is in that range...
our hearing is but our voices aren't...
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