The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 04, 1993
Filed:
Nov. 27, 1990
Applicant:
Inventors:
Shinjiro Kato, Kawagoe, JP;
Hisashi Kihara, Kawagoe, JP;
Fumio Tamura, Kawagoe, JP;
Shuichi Mori, Kawagoe, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03G / ;
U.S. Cl.
CPC ...
381107 ; 381 57 ; 381 86 ;
Abstract
AN on-board vehicle automatic sound volume adjusting apparatus which adjusts the level of an input audio signal in accordance with the difference between the input audio signal level and the running noise level inside the vehicle and which compresses the input audio signal in terms of amplitude according to the level difference. The apparatus inhibits the masking of the minimum component in the reproduced sound volume, and prevents the maximum component therein from becoming excessive when the running noise level is raised.