I guess 'white' because it equates with white light, which is what you get when all the colours of the light spectrum are combined equally?
Pink noise is what you get when you drop the power by a certain amount with each increase in frequency. I think. So you've still got all the frequencies, but some are louder than others. It generally sounds 'lower' pitched than white noise. There's a more techie description here:
http://www.cim.mcgill.ca/~clark/nordmodularbook/nm_noise.html
The other commonly used one is brown noise (brown as in Brownian motion), which... ah, it's all on that site. I know them from sound editing software which allows you to generate white, pink and brown noise. Each one sounds like a lower pitched version of the last. The above site explains that the reason for doing it is to take into account the human ear which 'favours' higher frequencies over lower ones.
Fish around on the web and you'll find definitions for orange, blue, green, black noises etc.
I bet this isn't helping at all, is it? Lemme think... I've heard it said that, with the right filters, and white noise covering every frequency audible to the human ear, you could 'sculpt' any sound imaginable. Which is nice. Thinking about the experience you describe above - you could probably cobble some theory together about white noise as information, and what it would be like to be exposed to 'all possible information' or 'all possible sensations'... urgh, I'm rambling.
[ 31-01-2002: Message edited by: Saveloy ] |