Artificial cochlea voice processing method and system

Abstract

The invention discloses an artificial cochlea voice processing method and system. The method comprises the following steps: acquiring a sound signal, converting the sound signal into a digital signal,decomposing the digital signal by adopting a modal decomposition method to obtain a plurality of intrinsic mode function components, converting the plurality of intrinsic mode functions into instantaneous frequency and instantaneous amplitude, classifying the instantaneous frequencies to enable the instantaneous frequencies to correspond to preset electrode frequency bands in the artificial cochlea, selecting n electrode frequency band components with the highest energy from the corresponding electrode frequency bands, and generating corresponding electrode stimulation signals according to the selected electrode frequency band components. On the basis of Hilbert-Huang transform, the sound is analyzed in the time domain, limitation of the uncertainty principle is avoided, and noise generated by harmonic waves does not exist.

Description

technical field [0001] The invention relates to the field of cochlear implants, in particular to a cochlear implant voice processing method and system. Background technique [0002] Unlike hearing aids, which selectively amplify sound, cochlear implants must transmit sound signals directly to the afferent auditory nerve of the ear and then to the primary auditory cortex to produce sound. Thus, cochlear implants directly generate the perception of sound to the primary auditory cortex. In this sense, a cochlear implant is a therapeutic, not just a prosthetic, treatment for severe hearing loss or even complete deafness due to damage or defect of the middle and inner ear. It bypasses the damaged part of the ear and sends the processed signal directly to the auditory nerve. Current cochlear implants are based on the wrong assumption that cochlear implants are based on biological Fourier analysis or on Fourier filter banks. In order to overcome the deficiencies of current cochl...

AI Technical Summary

Problems solved by technology

However, there are some serious problems: First, the maximum number of electrodes that can be accommodated is limited, about 25, but in order to avoid crosstalk, the number of electrodes that can be activated at the same time is only 6

[0021] (1) Generally speaking, implanters can understand speech well with some training, but pitch perception is usually poor, and auditory training may help;

[0022] (2) On average, implanters listened to music at a rhythm that was similar to that of normal people, but the melody recognition ability was poor, and for many implanters, performance was no better than random;

[0023] (3) The perception of timbre is usually unsatisfactory. Compared with normal hearing subjects, implanters tend to evaluate music near harsh sounds as unpleasant music;

Therefore, its superimposed sum will result in unwanted noise

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