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:
Apr. 18, 1989
Filed:
Jul. 22, 1986
Applicant:
Inventor:
David M Schwartz, Los Altos Hills, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G / ;
U.S. Cl.
CPC ...
381103 ;
Abstract
A sound reproduction system for automatically adjusting the output characteristics of a speaker or speakers in response to the acoustical characteristics of the external environment for the speakers by the use of sensors operatively connected to a microprocessor which in turn is connected to further processing in a digital preamplifier which processing includes comparison of data received from the sensor about the environment and the audio signal treatment by the environment and alters the output of the digital preamplifier to compensate for the environment and changes in the environment.