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:
Mar. 29, 2016
Filed:
Mar. 01, 2013
Knowles Ipc (M) Sdn. Bhd., Penang, MY;
Friedrich Reining, Vienna, AT;
Knowles IPC (M) SDN. BHD., Penang, MY;
Abstract
An audio system comprises an electro-acoustic transducer () with transducer connections () to receive an audio signal (AS) in the audio frequency range from a driver circuit () and measure means () to measure the excursion of a diaphragm () of the electro-acoustic transducer (), wherein a sensor signal source () provides a sensor signal (SS) at the transducer connections () with a sensor frequency beyond the audio frequency range and in the range of the resonance frequency of the electro-acoustic transducer and, wherein the measure means () comprise a sensor circuit () to sense changes of the impedance of the electro-acoustic transducer () for the sensor signal (SS) at the transducer connections () caused by the excursion of the diaphragm () due to the audio signal (AS).