Oticon Medical A/s

Behnam Molaee

Manuel Segovia Martinez

Bradford Backus

Dan Gnansia

Pierre Stahl

Attila Frater

Thomas Demarcy

A method and a system for measuring a main electrically evoked compound action potential is described. The system may comprise a cochlea implant system which includes an electrode array, and where the electrode array includes at least a stimulator electrode, a first recording electrode and a second recording electrode, and where the first recording electrode is arranged closer to the stimulator electrode than the second recording electrode, a processor electrically in communication with the cochlea implant system. The processor may be configured to apply a stimulation including a first primary stimulation paradigm to the stimulator electrode and to receive a first primary cochlea response signal recorded by the first recording electrode while applying the stimulation, and to receive a first secondary cochlea response signal recorded by the second recording electrode, and determine the main electrically evoked compound action potential based on a difference between the first primary cochlea response signal and the first secondary cochlea response signal.

ECAP recording method and cochlea implant system

The aspect of the disclosure is achieved by a cochlear implant system which comprises a microphone unit configured to receive an acoustical signal and transmit an audio signal based on the acoustical signal and an electrode array comprising a plurality of electrodes. Furthermore, the system comprises a processor unit including a filter bank which includes multiple bandpass channels configured to divide the audio signal into multiple bandpass audio signals. Each of the multiple bandpass channel may be confined to an electrode of the plurality of electrodes. Furthermore, the system may comprise a first temporal feature extractor configured to determine a primary group of temporal features of a bandpass audio signal of the multiple bandpass audio signals, and a second temporal feature extractor configured to window filter the bandpass audio signal and determine a secondary group of temporal features of the window filtered bandpass audio signal. The system further comprises a stimulation generator configured to determine a final group of temporal features based on the primary group of temporal features and the secondary group of temporal features, and a similarity measure value of the primary and the secondary group of temporal features is determined for the final group of temporal features. The processor unit is configured to decide based on the similarity measure value whether the final group of temporal features is to be encoded into a stimulation pulse or to prioritize based on the similarity measure value a stimulation pulse encoded based on the final group of temporal features, and wherein the encoded stimulation pulse is transferred to an electrode of the plurality of electrodes, and where the electrode is configured to apply an electrical stimulation to a group of auditory nerve fibers of a recipient of the cochlear implant system based on the encoded stimulation pulse.

Cochlear implant system with an improved selection of temporal features for which to be coded into stimulation pulses

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Vallauris, France

Behnam Molaee