Electrical cochlea speech processor and processing method with signal compression in wide dynamic range

Abstract

The invention discloses an electric cochlea speech processor and processing method with signal compression in a wide dynamic range. The electric cochlea speech processing method comprises the following steps that: a processing unit performs pre-emphasis processing and frequency division processing on transmitted acoustic signals by a frequency division module, and processing results are combined into M channels; according to a comfortable threshold parameter or a perception threshold parameter measured in advance of the M channels of an electric cochlea implanted person, a compression unit calculates an acoustic signal intensity parameter corresponding to an electric stimulation perception threshold or an acoustic signal intensity parameter corresponding to a comfortable threshold by an acoustic-electric compression function; then by adopting the parameter as an inflection point, and according to a compression curve in the wide dynamic range enveloped by a frequency spectrum, the compression unit calculates sound intensity after compression of each channel; and finally, after wide-dynamic compression, output sound intensity is subjected to acoustic-electric stimulus compression and then is output. The electric cochlea speech processor enhances signal processing efficiency and improves individual speech recognition ability of the electric cochlea implanted person.

Description

technical field [0001] The invention relates to the technical field of cochlear electronics, in particular to a speech processor and a method for compressing and processing signals with a wide dynamic range of the cochlear electron. Background technique [0002] Hair cells in the human cochlea are sensory cells that receive sound. Severe hearing loss occurs when cochlear hair cell damage is severe. A cochlear electron is an electronic device that replaces damaged hair cells and regains sound signals through electrical stimulation of the auditory nerve. figure 1 Shown is a schematic diagram of the structure of the cochlear implant. The cochlear electron is composed of two parts: external machine parts and implant parts. The external machine parts mainly include microphones (such as microphones, etc.), speech processors and transmitting coils. The implant parts mainly include receiving coils, stimulators and multi-channel electrode arrays. composition. [0003] When the sy...

AI Technical Summary

Problems solved by technology

The extracted envelope information is logarithmically compressed to accommodate the narrow dynamic range of electrical stimulation, but the input dynamic range of the signal in these processes is completely determined by the result of envelope extraction, such a cochlear electronic speech processor is not efficient in signal processing. High, the language recognition rate is not good, which affects the user's hearing

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