Got a laptop? Let's try noise cancelling

Programming applications for making music on Linux.

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jago25_98
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Joined: Tue Jun 23, 2009 7:18 pm

Got a laptop? Let's try noise cancelling

Post by jago25_98 »

It might not work because of latency.
It might not work because of distance from the speakers to the ear.

But let's try it anyway!

All that needs to be done is listen to the mic, phase inverse this, and re-output this to the speakers.

Programming might not be needed.

What program would be the thing to try this myself?

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DioXide
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Re: Got a laptop? Let's try noise cancelling

Post by DioXide »

Won't work.

Latency (it has to be exactly zero - that's why this is done with analog circuits)

Distance from speakers to ears (that's why it's only used on headphones)

Distance between speakers and mike (on headphones the mikes are right next to the speakers)

--

We're talking about simple phase manipulation..

It can be done (in fact, some next-gen cars will use this very thing to cancel out the engine's noise),
but you'll need quite a bit more math
Expert in non-working solutions.
(Signature shamelessly ripped from someone else, is still the truth)

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unfa
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Re: Got a laptop? Let's try noise cancelling

Post by unfa »

Also: laptop speakers might not be accurate enough to emit all needed frequencies. Not speaking that it'd need to be equalized.

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