Abstract:The acoustic feedback which causes a hearing aid to become unstable at high gains is effectively reduced by the addition of negative electrical feedback. Electrical feedback is formed by a system estimator which closely matches the open-loop transfer function of an in situ hearing aid. The system estimator is produced by correlating the estimator signal with the hearing-aid signal. Because the estimator does not affect the characteristics of the hearing aid, speech intelligibility is not degraded by this feedb… Show more
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