Audio device filter modification

Abstract

An audio device with a number of microphones that are configured into a microphone array. An audio signal processing system in communication with the microphone array is configured to derive a plurality of audio signals from the plurality of microphones, use prior audio data to operate a filter topology that processes audio signals so as to make the array more sensitive to desired sounds than to undesired sounds, categorize received sounds as one of desired sounds or undesired sounds, and use the categorized received sounds and the categories of the received sounds to modify the filter topology.

Description

technical field [0001] The present disclosure relates to an audio device having a microphone array. Background technique [0002] Beamformers are used in audio devices to improve detection of desired sounds, such as voice commands to the device, in the presence of noise. Beamformers are often based on audio data collected in carefully controlled environments, where the data can be flagged as desired or undesirable. However, when an audio device is used in a real-world situation, a beamformer based on idealized data is only an approximation and thus may not be as effective as it should be. Contents of the invention [0003] All examples and features mentioned below can be combined in any technically possible way. [0004] In one aspect, an audio device includes a plurality of spatially separated microphones configured as a microphone array, wherein the microphones are adapted to receive sound. There is a processing system in communication with the microphone array and co...

AI Technical Summary

Problems solved by technology

However, when audio equipment is used in real-world situations, beamformers based on idealized data are only approximations and thus may not perform as well as they should

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