Sound reproduction system

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United States of America Patent

PATENT NO 5509081
SERIAL NO

08473100

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Abstract

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The invention relates to a sound reproduction system comprising a source of a sound signal in electrical form, a first filter group for dividing the signal derived from the sound signal source into several sound signals occurring in different frequency bands and an adjustable gain amplifier for each frequency band for amplifying the sound signal occurring in said frequency band. To take into account the noise existing in the environment of the sound reproduction system in the adjustment of the system, the system further comprises means for generating an electrical signal proportional to the background noise existing in the environment and means for adjusting the gain of the amplifiers in response to said electrical signal proportional to the background noise.

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Patent Owner(s)

Patent OwnerAddress
NOKIA TECHNOLOGY GMBH44807 BOCHUM

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kuusama, Juha Tampere, FI 5 147

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