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:
Oct. 04, 1977
Filed:
Mar. 16, 1976
Howard Norman McGregor, Littleton, CO (US);
Robert Charles Chanaud, Boulder, CO (US);
Other;
Abstract
A dynamic sound controller is designed to automatically adjust and shape the spectral distribution and amplitude of random masking noise before delivery via speakers to the environment of a room according to a preprogrammed timing sequence. In addition, the sound controller is capable of operating as a security and fire alarm system and is further capable of mixing a predetermined amount of background music and paging signals into the same set of speakers. The sound controller of the present invention is further adaptable to a variety of environmental detectors which adjust and shape the noise in response to such factors as temperature, humidity, light level, ionization level and background noise level. A method for shaping spectral distribution and for adjusting amplitude of masking noise in relation to the measured ambient and intrusion noise levels is disclosed.