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:
Sep. 16, 2014
Filed:
Nov. 29, 2011
V. C. Prakash Vk Chacko, Penang, MY;
Thean Hai Ooi, Batu Maung, MY;
Kar Boon Oung, Penang, MY;
Cheah Heng Tan, Bayan Lepas, MY;
Huoy Thyng Yow, Perak, MY;
V. C. Prakash VK Chacko, Penang, MY;
Thean Hai Ooi, Batu Maung, MY;
Kar Boon Oung, Penang, MY;
Cheah Heng Tan, Bayan Lepas, MY;
Huoy Thyng Yow, Perak, MY;
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
A method and apparatus for receiving and playing a signal in a radio receiver to suppress microphonic feedback are provided by alternately pitch shifting a received audio signal. The pitch of the received audio signal is alternately shifted up and then down, repeatedly over successive intervals of the audio signal, to produce a pitch swing signal which is then played over a speaker. The alternating pitch shifting prevents the buildup of regenerative feedback normally caused by acoustic vibrations coupling into the radio receiver.