Pink noise
The pink Bruit is a random signal whose Spectral concentration of power decrease of 3dB per octave. Its spectral concentration of power thus tends towards the infinite one for the low frequencies and zero for the high frequencies; on the other hand, it remains constant on the beach of frequency of any Octave. This signal approaches more sensitivity of the ear than the white Bruit. For this reason, the pink noise is thus often used in the audible universe to calculate the frequential Réponse of a sound chain of reproduction. It can be also used to measure the characteristics of the transducers electroacoustics (Microphone, Haut-parleur, pregnant). It is also useful in the Acoustique of the rooms and acoustics of the building. For example, a pink noise is emitted in a room via a Haut-parleur and a Microphone, located in the room, records the received signal. The spectrum measured makes it possible to know the Fréquence S attenuated and to correct them via a equalizer.
In the building, measurement in situ of an insulation is done by comparison between a pink noise of emission and the noise measured in the part of reception.
Internal bonds
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