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. 08, 2013
Filed:
May. 14, 2010
Chee Sin Cheah, Singapore, SG;
Huoy RU Rachel Koh, Singapore, SG;
Boon Cheong Raymond NG, Singapore, SG;
Chee Sin Cheah, Singapore, SG;
Huoy Ru Rachel Koh, Singapore, SG;
Boon Cheong Raymond Ng, Singapore, SG;
Creative Technology Ltd, Singapore, SG;
Abstract
A noise reduction circuitfor a headphoneis disclosed herein. In a described embodiment, the headphoneincludes a speaker driverand the circuitcomprises a microphoneconfigured to convert ambient sound into a corresponding electrical ambient signal and which is disposed adjacent to the speaker driver's diaphragm. The circuitfurther includes an active noise reduction path configured to provide active noise reduction of the ambient sound based on the corresponding electrical ambient signal and a vocal signal compensation path configured to restore attenuated signals within the vocal range of the corresponding electrical ambient signal to increase audibility of vocal signals of the ambient sound. The circuitalso includes a switching devicearranged to selectively deliver the corresponding electrical ambient signal to the active noise reduction path or to the vocal signal compensation path.