Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Reexamination Certificate
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.
Hasegawa Akinori
Konno Fumiyasu
Onishi Masahide
Matsushita Electric - Industrial Co., Ltd.
Mei Xu
RatnerPrestia
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