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C-18.1, r. 3 - Technical Standards Regulation
Section 6
Disposition versions
6. The electro-acoustic response of the B chain is the sound pressure level expressed in decibels with respect to an arbitrary reference pressure over a given frequency range, measured at a given position in the listening area where pink noise of constant electromotive force is applied to the input terminals of the main fader, preceding the power amplifier.
In a given listening area for the public viewing of films, this response is obtained by averaging the rms sound pressures for each frequency band, at all measuring positions.
