Automatic microphone muting of undesired noises by microphone arrays

摘要

Methods and systems for cancellation of table noise in a speaker system used for video or audio conferencing are disclosed. Table noise is cancelled by using a vertical microphone array to distinguish the tilt angle of sound received by a microphone. If the sound is close to horizontal, the audio is muted. If the sound is above a given angle from horizontal, it is not muted, as this indicates a person speaking. This eliminates paper rustling, keyboard clicks and the like.

主权项

1. A microphone system comprising:
a vertical microphone array having at least two microphones, with a first microphone near a horizontal surface and a second microphone located above said first microphone; and a processor coupled to said microphone array to receive sound from said first and second microphones and configured to determine an angle from horizontal of a received sound and mute said sound if said angle from horizontal is below a predetermined amount.