Pink noise a.k.a. 1⁄f noise, fractional noise or fractal noise is a signal with a frequency spectrum such that the power spectral density (power per frequency interval) is inversely proportional to the frequency of the signal.
Pink noise sounds like a waterfall and it’s sometimes used to tune loudspeaker systems in professional audio settings.
Download one of these free pink noise MP3 files to your phone, tablet, or laptop. Play the sounds to relax or help you fall asleep.
- 10 minutes 6.65 MB
- 30 minutes 19.6 MB
- 1 hour 39.3 MB
Compare pink noise to white noise.