System for automatic compensation of low frequency audio...

Details System for automatic compensation of low frequency audio... System for automatic compensation of low frequency audio...

2004-05-26

2011-11-08

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Including frequency control

Automatic tone control

C381S056000, C381S098000, C381S103000

Reexamination Certificate

active

08054993

ABSTRACT:
A system for boosting the bass of an audio signal to closely match or mirrors a plurality of Robinson-Dadson loudness curves by interpolating coefficients from a table of values representing the Robinson-Dadson loudness. The system having a controller that interpolates the coefficients from the loudness curves and then uses the coefficients in a shelf filter that makes adjustments to the audio signal. The result of the adjustments to the audio signal is the introduction of bass boost slowly through a diminuendo or lowering of level through volume adjustment and to removes the bass boost rapidly during a crescendo or increase in level through user volume adjustment.

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