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. 29, 2009
Filed:
Nov. 17, 2004
Kim Spetzler Petersen, Hellerup, DK;
Kim Spetzler Petersen, Hellerup, DK;
Oticon A/S, Smørum, DK;
Abstract
The invention concerns a method for detecting and minimizing the harmful influence of ultra sound in a listening device having two or more microphones. The energy contents in the microphone signals is determined, and time related changes in energy contents of the microphone signals is analysed to determine whether any of the microphones is subjected to an ultrasound sound-field, and the signal from the microphone with the lowest content of ultrasound is routed through a signal processing device to an output unit. The invention further concerns a listening device having means for choosing the microphone channel with the lowest level of ultrasound.