Patent · US Active

Reducing acoustic feedback over variable-delay pathway

US10708689B2 · kind B2 · utility

0Cited by

5References

19Claims

0Family size

Assignee

LogMeln, Inc. · US

Inventors

Carlotta ANEMÜLLER · Erlangen, DE
Florian Heese · Dresden, DE
Patrick Vicinus · Friedrichsdorf, DE

Key dates

Filing date	May 15, 2019
Grant date	Jul 7, 2020
Priority date	—
Expiry date	May 15, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04R3/04
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A technique for reducing acoustic feedback in audio communications includes measuring variations in round-trip delay over an audio signal pathway. The technique varies a delay interval of an adjustable-delay element in real time based on the measured variations in round-trip delay, effectively canceling the delay variations. Further techniques are disclosed for detecting and eliminating howling frequencies which arise as a result of acoustic feedback in the audio signal pathway.

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