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:
Jun. 02, 2020
Filed:
Mar. 26, 2018
Cirrus Logic International Semiconductor Ltd., Edinburgh, GB;
John Paul Lesso, Edinburgh, GB;
Emmanuel Philippe Christian Hardy, Edinburgh, GB;
Cirrus Logic, Inc., Austin, TX (US);
Abstract
This application describes a noise reduction apparatus () for a microphone device () having an acoustic port (). The apparatus has a spectrum peak detect block () for receiving a microphone signal (S) and determining, from the microphone signal, at least one characteristic of a resonance peak () associated with the acoustic port of the microphone. The at least one characteristic may comprise a resonance frequency (f) and/or quality factor (Q). A noise reduction block () is configured to process the microphone signal based on the resonance characteristic so as to reduce noise in the processed microphone signal due to said resonance. The noise reduction block may apply a function which is the inverse of the determined resonance characteristic.