Rheinisch-Westfalische Technische Hochschule (Rwth) Aachen

Rheinisch-Westfaelische Technische Hochschule Aachen

Rheinisch-Westfalische Technische Hochschule Aachen

Stefan Liebich

Peter Jax

Johannes Fabry

Daniel Rueschen

Carlotta Anemueller

Carlotta ANEMÜLLER

Daniel RÜSCHEN

In the method according to the invention for actively suppressing the occlusion effect during the playback of audio signals by means of headphones or a hearing aid, a sound signal occurring from outside is captured by means of at least one outer microphone of the headphones or the hearing aid. A voice signal is captured by means of at least one additional microphone. The dry component of the captured voice signal is estimated, the dry component of the captured voice signal being the component of the captured voice signal without reverberation caused by the surrounding space. By means of a filter, a voice component is extracted from the outer sound captured using the at least one outer microphone. The extracted or produced voice component is output by means of a loudspeaker of the headphones or the hearing aid.

Method, device, headphones and computer program for actively suppressing the occlusion effect during the playback of audio signals

In the method according to the invention for active noise suppression, a transfer function for a secondary path between a loudspeaker and an error microphone is measured (). Based on the measured transfer function for the secondary path, a transfer function for a primary path between a reference microphone and the error microphone is estimated (). Based on the estimated transfer function for the primary path, filter coefficients for filtering to generate the cancellation signal are then determined ().

Method, device, headphones and computer program for actively suppressing interfering noise

A hearing aid for compensating for an occlusion effect while emitting an acoustic useful signal into an auditory canal of a human ear comprises an earbud that can be inserted into the auditory canal, a speaker for emitting a compensation signal into the auditory canal, a microphone for receiving an error signal from the auditory canal, and a control unit for processing a recorded signal to be emitted. The controller is designed by measuring a nominal secondary path between a speaker and the microphone and determining a transmission function that describes behavior of the nominal secondary path, determining a first requirement as a tolerance band about the transmission function, determining a second requirement as a desired sensitivity function of the hearing aid, designing the controller using an optimization method while simultaneously taking the first and second requirements into consideration, and implementing the controller in the control unit.

Active suppression of occlusion effect in hearing aid

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Aachen, Germany

Stefan Liebich