If you put a noise canceling microphone on top of a door frame with an open door would it cancel the noise?
Such as the microphone is pointing down, and noise is going through the door, would the microphone pick it up and either cancel or reduce it?
You’d also need an amplifier, a processor circuit with noise canceling software and appropriate speakers, but theoretically you should be able to reduce the noise (probably not eliminate it. It may be only effective in specific directions or locations relative to the speakers, however. And it would probably take more than a little bit of work (and expense) to make it worth anything. Not a hobby I would suggest getting into casually.
February 11th, 2010 at 2:37 pm
You’d also need an amplifier, a processor circuit with noise canceling software and appropriate speakers, but theoretically you should be able to reduce the noise (probably not eliminate it. It may be only effective in specific directions or locations relative to the speakers, however. And it would probably take more than a little bit of work (and expense) to make it worth anything. Not a hobby I would suggest getting into casually.
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February 11th, 2010 at 3:08 pm
Microphone alone is not enough, there is no such thing as a "noise canceling microphone".
It takes a microphone, amplifier, speakers and special software.
And the noise will only be partially cancelled, and that only near the microphone.
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February 11th, 2010 at 3:58 pm
The first answer is correct, but the second is wrong in its denial of existence of the device – they exist, they just won’t help you. A noise canceling microphone has two pickups one of which "listens" to what a person is saying from nearby that also picks up the background and the other is aimed away from the person and picks up the background. A fairly simple circuit (or a fancy one) subtracts the background from the voice+background allowing the voice to be clearer on recordings or radio transmissions.
But that does absolutely nothing for reducing the noise in the background for those next to the mike. Noise canceling earphones (like Bose) work in a very limited environment – around the ears and have a microphone that listens to the background and produces a negative of that inside the earphones, leaving the music undisturbed. Very hard to do in an open space.
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February 11th, 2010 at 4:06 pm
it depends on the microphone
if you refer to a CB type microphone it has less output so you need to shout louder to be heard
noise cancelling is a software package on modern equipment
how it works is very complex
it will effectively cancel some noises while making other worse!
it is costly and difficult to operate
just look at the news on TV sometimes you see the technicians with the boom and microphone and someone else is tweaking the recorder
and they often have to repeat several times.
A
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