Pink Noise

Pink noise gets its name from the pink appearance of visible light in its power spectrum. Pink noise has equal energy in all octaves of frequency.

Pink Noise  1 minute MP3

This pink noise file is a 1 minute long mono MP3 file.

Interestingly pink noise occurs naturally in some astronomical bodies electromagetic radiation, heartbeat rhytms, and neural activity.

Try the white noise and brown noise too.