Ams Ag

Ams Sensors UK Limited

Ams-Osram Ag

Peter McCutcheon

Dylan Morgan

Martin Schoerkmaier

A coupler for an acoustic device includes a main opening for inserting the acoustic device or an adapter for the acoustic device. The coupler also includes a main channel connected at one end to the main opening. The coupler further includes one or more leakage paths for allowing sound to escape the main channel when in use. The coupler additionally includes one or more acoustic resonators connected to the main channel. The one or more acoustic resonators includes a first acoustic resonator configured to have a fundamental resonance frequency in the range of 500 Hz to 1 kHz and a second acoustic resonator configured to have a fundamental resonance frequency in the range of 3.85 kHz to 5 kHz.

Earphone coupler

An audio system for an ear mountable playback device comprises a speaker and an error microphone that is configured to sense sound being output from the speaker and ambient sound. The audio system further comprises a detection engine that is configured to determine a driver response between the speaker and the error microphone, and to estimate a leakage condition from the determined driver response.

Audio system and signal processing method for an ear mountable playback device

An audio system for an ear mountable playback device comprises a compensation filter configured to generate a third compensation signal by applying filter operations to an audio signal, and an error compensation unit configured to generate a compensated error signal on the basis of the third compensation signal and a disturbed audio signal from an error microphone. The audio system further comprises a first noise filter configured to be adapted based on the compensated error signal, and a detection unit configured to estimate the acoustic leakage condition on the basis of the first noise filter or of the disturbed audio signal and an audio output signal. The compensation filter is configured to be adapted based on the acoustic leakage condition.

A method for tuning filter parameters of a noise cancellation enabled audio system with an ear-mountable playback device comprising a speaker and a feedback noise microphone located in proximity to the speaker comprises provision of acoustic transfer functions between the speaker and the feedback noise microphone, between the speaker and an eardrum, between an ambient sound source and the eardrum and between the ambient sound source and the feedback noise microphone. The parameters of a feedback filter function, which is designed to process a feedback noise signal, are tuned. A noise cancellation performance of the audio system at the eardrum is determined based on each of the acoustic transfer functions and on the feedback filter function.

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Eindhoven, Netherlands

Peter McCutcheon