Dave Plowman (Ignorant Nutcase) wrote:


I have a digital equaliser which generates what it claims to be pink noise
- and uses that to auto-eq a speaker system. It's very different from the
pink noise Audacity generates.

My feeling is pink noise may not mean the same to all. ;-)


** Pink Noise is a general term for any random noise that has the characteristic of equal energy per octave - as opposed to "White Noise" which has equal energy in equal amounts of bandwidth.

However, a given pink noise source will have band limits - a lower and upper frequency beyond which the noise is no longer "pink" or of constant level. When represented on a scope screen, pink noises with different band limits look very different.

Also, pink noise comes in small doses - such as of 1 octave or 1/3 octave too - in which case the centre frequency is quoted.


.... Phil