Reduction of Transient Sounds in Hearing Implants

摘要

A method is described for generating electrode stimulation signals for electrode contacts in a cochlear implant electrode array. An input audio signal is processed to generate band pass channel signals that each represent an associated band of audio frequencies. A channel envelope is extracted from each channel signal. The input audio signal and the channel envelopes are processed to produce transient reduced envelopes based on: i. determining for each channel envelope a normalized channel-specific transient indicator characterizing transient noise present in the channel signal, ii. determining a combined transient indicator as a function of the channel-specific transient indicators, and iii. applying a channel-specific gain to the channel envelopes as a function of the combined transient indicator to produce the transient reduced envelopes. The transient reduced envelopes are then used to generate electrode stimulation signals to the electrode contacts.

主权项

1. A computer program product implemented in a non-transitory, tangible computer readable storage medium for generating electrode stimulation signals for electrode contacts in a cochlear implant electrode array, the product comprising:
program code for processing an input audio signal to generate a plurality of band pass channel signals each representing an associated band of audio frequencies; program code for extracting a channel envelope from each channel signal; program code for processing the input audio signal and the channel envelopes to produce transient reduced envelopes based on:
i. determining for each channel envelope a normalized channel-specific transient indicator characterizing transient noise present in the channel signal,ii. determining a combined transient indicator as a function of the channel-specific transient indicators, andiii. applying a channel-specific gain to the channel envelopes as a function of the combined transient indicator to produce the transient reduced envelopes; and program code for using the transient reduced envelopes to generate electrode stimulation signals to the electrode contacts.