System for managing feedback
AssigneeZounds Hearing, Inc.
InventorSandeep Prasad Sira
Life of this patent
Estimating the term…
Abstract
Feedback detection, adaptive notch filtering, and gain adjustment are combined for managing feedback. Feedback detection includes detection of short term and long term spectral peaks and assessing their magnitude, shape, rate of growth, and power concentration ratio. A plurality of notch filters are available and are allocated according to the spectral magnitude of the feedback detected. Wide band gain adjustment supplements the notch filters.
Claims14
A system for managing audio feedback, said system comprising:
- a feedback detector, including a short peak detector and a long peak detector;
- at least two adaptive notch filters coupled to said feedback detector;
- and
- a control circuit coupled to said feedback detector and to said at least two adaptive notch filters for setting the depth, width, and frequency of at least one of said adaptive notch filters in accordance with data from said feedback detector.
In a hearing aid having a speaker and a microphone, the improvement comprising a system for managing feedback from said speaker to said microphone, wherein said system includes:
- a feedback detector coupled to said microphone, said feedback detector including a short peak detector and a long peak detector;
- at least two adaptive notch filters coupled to said feedback detector;
- and
- a control circuit coupled to said feedback detector and to said at least two adaptive notch filters for setting the depth, width, and frequency of at least one of said adaptive notch filters in accordance with data from said feedback detector.
Dependencies are inferred from the claim text.