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Audio Detector Answered

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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guyfrom7up (author)2008-06-17

what frequency rang specifically, you might be able to get away with a simple microphone

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brickzima (author)guyfrom7up2008-06-17

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.

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user

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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user

Don't you just feel crazy when you can hear a really high pitch noise when no one can?

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Lithium Rain (author)guyfrom7up2008-06-18

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...

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guyfrom7up (author)brickzima2008-06-17

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

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brickzima (author)guyfrom7up2008-06-17

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.

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guyfrom7up (author)brickzima2008-06-17

well, human voice is in that range...

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user

our hearing is but our voices aren't...

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user

yeah it is, the microphone can "hear" from 30hz to 15000hz, human voice is ~300Hz to 4000Hz

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user

As in our voices don't go as high as that... A good microphone and speaker should be able to do at least 20hz - 20khz which is the hearing range of an average human... Apparently...

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user

ok, so are you saying that i could use just a high quality mic to detect mosquito rings? I can worry about the other technical aspects of the project later. Now I'm just trying to find things that'll actually detect the sounds I want.

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user

I believe so, it is sound you're hunting, right? it's not too hard to do...

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Yep. I'm trying to hunt down the sources of extremely high pitched obnoxious sounds.

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I can find them with my ears, though super high pitched sounds aren't easy to find direction of naturally using a bit of wit can quickly unearth the buggers, then you do your worst to stop them...

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Lithium Rain (author)guyfrom7up2008-06-18

What would hear from 1-3 mhz?

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NachoMahma (author)guyfrom7up2008-06-18

. Coloratura sopranos peak out at high F (F6), whatever frequency that is.

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brickzima (author)guyfrom7up2008-06-17

Well that shows how much I know. Ill keep looking. Thanks for you help though.

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user

Yep, been one the floor of a physics class with my hands cupped to my head because my teacher had the oscillator set at 22khz, most were ok but some of us lot can hear above the average human range of 20khz... I'd rather not...

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