Cochlear implant encoding method based on cochlear auditory nonlinear dynamics mechanism

A technology of nonlinear dynamics and coding method, applied in speech analysis, instruments, etc., can solve the problems of small dynamic range of cochlear electronics and difficulty in transmitting pitch information, and achieve the effect of solving the problem of small dynamic range

Inactive Publication Date: 2018-05-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide a cochlear electronic coding method based on the nonlinear dynamic mechanism of c...

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  • Cochlear implant encoding method based on cochlear auditory nonlinear dynamics mechanism
  • Cochlear implant encoding method based on cochlear auditory nonlinear dynamics mechanism
  • Cochlear implant encoding method based on cochlear auditory nonlinear dynamics mechanism

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[0024] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] The cochlear coding method based on the nonlinear dynamic mechanism of cochlear hearing provided by the present invention is mainly used in the cochlear technology for hearing rehabilitation. Psychoacoustic research has shown that hearing is not a linear perception. For example, when two single-frequency sounds of different frequencies are excited, the listener can not only hear the frequency components of the two excitation signals, but also the frequency components of linear combinations such as their difference frequency (called "combined tone"). Combination tone") exists. When two t...

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Abstract

The invention discloses a cochlear implant encoding method based on a cochlear auditory nonlinear dynamics mechanism. The method comprises the steps that 1, a cochlear nonlinear dynamics model is built; 2, a nonlinear cochlear array is built, wherein the nonlinear cochlear array comprises n active simulation modules with different natural frequencies, each active simulation module conducts corresponding operation on a received input voice signal, and a real-time response output signal of each active simulation module is obtained; 3, the real-time response output signals of all the active simulation modules are subjected to rectification and lowpass filtering, and then an amplitude envelope is obtained, and the frequencies and the amplitude envelope are converted into pulse signals to be transmitted to the corresponding electrodes. Accordingly, by means of the cochlear nonlinear dynamics model, an acoustical signal obtained after processing can show the nonlinear dynamic range compression effect similar to cochlea processing results and generate a combination tone related to a tone, and then the problem that a traditional cochlear implant is small in dynamic range and difficult in tone information transmission is solved.

Description

technical field [0001] The invention belongs to the field of biomedical engineering, and more specifically relates to an electronic cochlear encoding method based on the nonlinear dynamic mechanism of cochlear hearing. Background technique [0002] As an important information channel for human beings to communicate with the outside world, hearing is an important way for human beings to survive and develop and perceive the world. However, a large number of people in the world live in a silent world due to various reasons. According to the statistics of the World Health Organization, there are currently 360 million people in the world who suffer from deafness or hearing impairment, accounting for 5% of the total number of people in the world. The vast majority of patients with profound deafness cannot convert the sound signal into an electrical signal that is transmitted to the auditory nerve so that they can feel the sound information. Cochlear Electronics is a human implant...

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Application Information

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IPC IPC(8): G10L19/008G10L21/0316G10L25/75
CPCG10L19/008G10L21/0316G10L25/75
Inventor 张艳平龙长才
Owner HUAZHONG UNIV OF SCI & TECH
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