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What is "white noise"?

Joel_Cairo

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is it like a specific frequency or something? How come static on a TV makes that particular sound? Waterfalls too, as far as I can tell.

Also, how about "brown noise" or "blue noise," are those real things? What's the difference?

just curious.
 

Piobaire

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"White" noise?

 

yachtie

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A continuum of frequencies having an equal power spectrum. IIRC.
 

redcaimen

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The kind of book critics rave about that no actual flesh and blood person finds pleasure or illumination in reading.
 

Joel_Cairo

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Originally Posted by yachtie
A continuum of frequencies having an equal power spectrum. IIRC.

thanks! I checked it out on wikipedia, but couldn't really make heads or tails of what they meant (I've spent the last couple decades avoiding math at all costs, so it was greek to me)
 

otc

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its a hissing noise as described by yachtie.

All frequency bands have the same power. A lot of offices pump in white noise to take advantage of the noise canceling properties of broad spectrum noise.

Pink noise is a close relative to white noise. It is supposed to sound a little but more pleasing to the ear since instead of putting the same power through each frequency, it applies the power across a curve representing the sensitivity of human ears. Sounds a little more balanced and less harsh but they basically all sound like the static on your TV.
 

Britalian

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Originally Posted by redcaimen
The kind of book critics rave about that no actual flesh and blood person finds pleasure or illumination in reading.

I enjoyed it.
 

ComboOrgan

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otc's explanation is good. The term "white noise" is comes from an analog to the visible-light spectrum. When all frequencies of visible light are combined, the result is white light, so it makes sense to describe a combination of all sound frequencies as "white". The other "colors" do not have a real-world analog. Here's a good wikipedia article: http://en.wikipedia.org/wiki/Colors_of_noise
 

ratboycom

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Is brown noise like hitting the "Brown note" with a subwoofer?
 

Syl

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Sound is characterized by its frequency. You are aware of bass, mids, highs etc. when it comes to music. One can break that down further into particular frequencies.
In acoustics, you can look at sound over a frequency spectrum:

On the y-axis is the sound pressure leve, on the x-axis is the frequency (from 31.5Hz to 8,000Hz).

In the above example, you notice that the noise is higher in the range of 500Hz to 2000Hz?

Well, white noise is essentially flat across the entire range.
Here's an example:
 

gdl203

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Are you sure you're not expecting a baby Joel? That's the second hint you drop in a couple of days... Babies love white noise as it reminds them of the muted sounds they heard in the womb. I couldn't believe how many channels and albums there are on Rhapsody for that - one night they get washer-dryer sound, next night they get ocean waves.
 

redcaimen

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dusty

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Originally Posted by redcaimen
The kind of book critics rave about that no actual flesh and blood person finds pleasure or illumination in reading.

One of my favorite books. Maybe it's our age difference?
 

rnoldh

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White Noise is a band that the Streetwear and Denim crowd like.
 

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