White noise is an audio signal that contains all the frequencies audible to the human ear. It is analogous to white light, which contains all the light frequencies visible to the human eye. Pink noise is a signal that is louder at low frequencies and decreases at a constant rate. It is sometimes referred to as flicker noise particularly, when it describes background noise emitted by an electronic device.
Pink noise is used to make music, sound effects, or merely as a pleasant background sound and is reported to sound more like the ocean than white noise (which is often compared to the sound of rainfall or TV static) because of its bias towards lower frequencies. Other colors of noise include: brown, blue, violet, and grey.
The Daily Omnivore 
Leave a Reply