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:
Feb. 18, 2020
Filed:
Feb. 14, 2019
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 an apparatus () for monitoring for blockage of an acoustic () port of a microphone device (). The apparatus has a spectrum peak detect block () for receiving a microphone signal (S) and determining, from the microphone signal, a resonance frequency (f) and a quality factor (Q) of a resonance () associated with the acoustic port. A condition monitoring block () is configured to determine any change in resonance frequency and quality factor and to determine a blockage status for the microphone based on said detect changes. The condition monitoring block identifies a change in blockage status if there is a change in quality factor.