Sound reproducing system

Details Sound reproducing system Sound reproducing system

2005-09-13

2005-09-13

Mei, Xu (Department: 2644)

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

C381S096000

Reexamination Certificate

active

06944302

ABSTRACT:
In a sound reproducing apparatus, a target control value is determined automatically from a noise and a sound radiated from a loudspeaker unit, and a volume of a reproduced sound is naturally compensated according to an amount of the noise against a masking due to a noise at a listening point. A first microphone is located near a loudspeaker box, and a second microphone is located in the loudspeaker box. A gain of s variable gain amplifier is changed so that an integrated value of a signal obtained by filtering and adding the outputs of the microphone may be equal to an integrated value of the filtered signal of the output of the variable gain amplifier.

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Search Report corresponding to application No. PCT/JP02/06080 dated Sep. 10, 2002.
English translation of PCT/ISA/210.

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