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Motion detection for microphone noise supression Disclosure Number: IPCOM000240660D
Publication Date: 2015-Feb-16
Document File: 2 page(s) / 49K

Publishing Venue

The Prior Art Database


This disclosure describes a system and method to silence microphone when movement is detected.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

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Motion detection for microphone noise supression

Movement of audio teleconferencing microphones during a conference call causes noise to be generated on the receiving end. Also, when loud noises are detected by the microphone (such as those caused by movement), current devices drastically reduce the volume sensitivity of the microphone for a prolonged time before gradually restoring the sensitivity to its normal level. This causes parts of conversations to be lost or made difficult to hear by the listening parties.

This inventions adds the functionality of a motion sensing device or accelerometer into the microphone housings and phone base of a standard type speakerphone system typically used in a conference room (ex. Polycom). Algorithms are used to determine when motion is detected so that moving microphone's sensitivity can be reduced or muted during the time the device is in motion. In the case of multiple microphones (base unit and satellite microphones) the devices in motion would be muted while the stationary microphone would operate as normal.

Basic block diagram of hardware implementation (Fig.1):


Algorithm flow diagram of basic logic for implementation (Fig.2):


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