Vehicle sound system

Details Vehicle sound system Vehicle sound system

1991-09-26

1993-04-20

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

4551861, 4551862, 4552381, 455345, 381 86, H04B 118, H04B 100

Patent

active

052049710

ABSTRACT:
A sound system for a vehicle detects the amount of noise, such as road noise, and automatically controls the audio volume in accordance with the noise amount. There are provided a plurality of tables, in which the relationships among the present volume, the noise amount and the volume increase amount of the audio signal are stored. Once one of the plurality of tables is selected by using a table selection key according to the type of the vehicle or the sound system, the volume is automatically controlled based on the characteristic of the selected table.

REFERENCES:
patent: 4864246 (1989-09-01), Kato et al.
patent: 4933987 (1990-06-01), Parks
patent: 5027432 (1991-06-01), Skala et al.
patent: 5081707 (1992-01-01), Schorman et al.

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