Re: Please, White Noise app
Re: Please, White Noise app
- Subject: Re: Please, White Noise app
- From: James Milne <email@hidden>
- Date: Sun, 21 May 2006 22:53:58 +0100
On Sunday, May 21, 2006, at 09:37PM, Bobby B <email@hidden> wrote:
>Hey guys;
>
>I beg you to please write a "white noise" app!
>
>I try to study in the library, everyone making noise, it is so hard to
>concentrate!
>
>It seems pretty simple. Just monitor the input from the microphone
>(don't Macs [I have a PowerBook] have built in mics?), and have it
>output white noise (for my headphones) to drown out whatever it hears.
> Isn't white noise just the inverse of the sounds?
What you're talking about is not called white noise. White noise is something completely different (google for "White Noise").
What you're talking about would require the computer to record the surrounding sound, and play the inverse of that back through your headphones at exactly the same time you heard the original sound with your ears.
It's doubtful that playing the inverse of the ambient sound would work because of latency. It takes time for the sound being recorded by your computer to be processed and fed back into your headphones. You'd have to predict what the sound was going to be in 10ms in the future, and mix the inverse of that into what you're hearing through your headphones. That's darn near impossible.
There are other issues too, like making the frequency response of your computer's microphone match that of your headphones, otherwise the effect won't really work.
Try buying some noise-cancelling headphones. They're pretty cheap these days.
--
James Milne
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