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. This pink noise file is a 1 minute long mono MP3 file.
Pink Noise 1 minute MP3
Interestingly pink noise occurs naturally in some astronomical bodies, electromagetic radiation, heartbeat rhytms, and neural activity.
Try the white noise and brown noise too. Do you know about violet and grey noise?