Crestron C2N-DAP8, Руководство по эксплуатации

Страница: 27 / 72

Crestron C2N-DAP8 Digital Audio Processor
Operations Guide – DOC. 8186 Digital Audio Processor: C2N-DAP8
•
23
The main function of pink noise is to calibrate a speaker’s interaction within its
given room. The reason that pink noise is used over other generated noises such as
white noise is because of its equal power to all octaves. This makes it easier to
calibrate for a flat plot on a real time analyzer, since the level will be uniform across
every octave. Pink noise is provided by DAT software or you can use an external
source such as a DVD or CD. This would be used with the
Room Calibration, Output
Settings, Graphic EQ and Parametric EQ tabs .
Graph 1:
Dolby Noise:
Dolby Noise is bandpass-filtered noise centered at 750Hz with a 12dB/octave roll
off. Dolby Noise is used for setting speakers to the same level when calibrating a
room.
White Noise (External Source Only):
White noise is a sound that is comprised of a random signal, with all audio
frequencies present, over time, and at various signal levels. It provides equal energy
per Hz, which will give a 3dB per octave increase starting from the lower frequency
range (20Hz) to the upper frequency range (20,000Hz). (Refer to Graph 2 after the
next paragraph for a visual reference.)
CAUTION: White noise is used to calibrate electronic equipment. It provides a
signal to measure levels and drives the circuitry at all signals simultaneously. IT
SHOULD NOT BE USED TO CALIBRATE SPEAKERS IN A ROOM. It can cause
a speaker’s tweeter to burn out and cause undesired response in the room due to the
levels you would set based upon the calibration.