Random sounding audio noise containing all frequencies in the audio spectrum tuned to the response of the human ear. Used with a Spectrum Analyser to set equalisation equipment for a large PA installation. However, the human ear is still a better judge of how a system sounds. See also White Noise.
Test tone featuring equal amount of energy per octave of bandwidth
A type of audio signal used for measurement and analysis. Pink noise is derived from white noise (all frequencies in the human hearing range at equal amplitude), by filtering it to attenuate the volume of the signal at a rate of 6dB per octave. This compensates for the doubling of the number of frequencies per ascending octave. This produces a signal which has equal energy at every octave. See White Noise