Patent · US Active

Method for evaluating a useful signal and audio device

US9736599B2 · kind B2 · utility

0Cited by

4References

10Claims

0Family size

Assignee

Sivantos Pte. Ltd. · SG

Inventors

Walter Kellermann · Eckental, DE
Klaus Reindl · Erlangen, DE
Yuanhang Zheng · Erlangen, DE

Key dates

Filing date	Oct 2, 2015
Grant date	Aug 15, 2017
Priority date	—
Expiry date	Oct 2, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2460/01
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A high-performance method evaluates a useful signal of an audio device, and in particular of an audio apparatus, for example for reducing interference. Accordingly, in the method at least two microphone signals are each obtained from a sound signal and a reference signal is obtained from the microphone signals, a portion of the microphone signals from a predetermined direction being blocked. The microphone signals are filtered by a filter such that an evaluation signal is obtained. To that end, a coherence value is determined from portions of the reference signal and a power density value is determined from the coherence value. The filter is parameterized on the basis of the power density value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.