ADAPTIVE AUDIO EQUALIZATION FOR PERSONAL LISTENING DEVICES

摘要

An audio processor has an active noise cancellation (ANC) processor to compute an S-filter, which estimates a transfer function from an earpiece speaker, that is to be worn by a user, to an error microphone. The ANC processor adaptively produces an anti noise signal for reducing ambient noise that can be heard by the user. An adaptive equalization (EQ) processor has an EQ filter controller that adjusts an EQ filter, while audio user content is being filtered in accordance with the EQ filter before being fed to the speaker and then heard by the user. Other embodiments are also described and claimed.

主权项

1. An audio processor comprising:
an adaptive S-filter which estimates a transfer function from an earpiece speaker, that is to be worn by a user, to an error microphone; an S-filter controller to compute the adaptive S-filter; an adaptive EQ filter; and an EQ filter controller that is to adaptively adjust the EQ filter, while audio user content is being filtered in accordance with the EQ filter before being fed to the speaker and then heard by the user.