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Cochlear implant

A technology of cochlear implants and microphones, applied in ear therapy, medical science, speech analysis, etc., to avoid adverse effects and reduce algorithm complexity

Active Publication Date: 2014-04-30
SHANGHAI LISTENT MEDICAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a cochlear implant, which is used to solve the problem of speech clarity after music noise enhancement in the existing cochlear implant using spectral subtraction noise reduction processing

Method used

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Embodiment

[0034] This embodiment provides a two-way microphone voice noise reduction processing method, such as Figure 2a and Figure 2b As shown, the two-way microphone voice noise reduction processing method includes:

[0035] Perform A / D sampling on the two original voice signals received by the two microphones to obtain the first digital voice data s_1(n) output by the microphone before n time and the second digital voice data v_1(n) output by the rear microphone . Wherein, the A / D sampling rate may preferably be set to 16kHz. The sound tubes of the front microphone and the rear microphone are directed differently. The two microphones can be both condenser microphones, or other types of microphones such as MEMS microphones; the models of the two microphones can be the same or different; when the models of the microphones are the same, the two microphones can be omnidirectional microphones; When the microphone models are different, the two microphones can be a directional microp...

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Abstract

The invention provides a cochlear implant which comprises an external cochlear implant device and an internal cochlear implant device. The external cochlear implant device comprises a front microphone and a rear microphone. The front microphone and the rear microphone are arranged on the external cochlear implant device, are different in sound tube direction and are both used for receiving original voice signals, and two microphone voice noise-reduction processing systems are connected with the front microphone and the rear microphone respectively and carry out noise reduction processing on the two original voice signals to extract pure voice signals. According to the cochlear implant, a dual-stage noise reduction mode is adopted, the sound tube directions of the two microphones are ingeniously designed, the power spectral subtraction theory is introduced in cooperation, noise-contained voice and noise are estimated, and the algorithm complexity is greatly lowered compared with a traditional spectral subtraction algorithm; in addition, the defect that noise of noise-contained voice signals is inaccurately estimated in the traditional spectral subtraction algorithm is overcome, and adverse effects of music noise caused by the traditional spectral subtraction noise reduction algorithm on use of the cochlear implant are also avoided.

Description

technical field [0001] The invention belongs to the technical field of electronic products and relates to a cochlear implant. Background technique [0002] Cochlear Implant is an electronic device that restores or obtains hearing for adults or children with severe, profound or total deafness. It can completely replace damaged inner ear hair cells and convert external sounds into nerve electrical impulses. The signal bypasses the necrotic hair cells in the auditory system, directly stimulates the spiral ganglion of the auditory nerve, and transmits information to the brain. In cases of severe hearing loss, a cochlear implant is the only hope and choice for deaf patients. The cochlear implant is mainly composed of two parts: an external machine and an internal machine. Its working principle is as follows: figure 1 As shown, the microphone collects the external sound signal; the sound processor adopts a certain sound processing strategy to process the sound signal, encodes th...

Claims

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Application Information

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IPC IPC(8): G10L21/0224G10L21/02A61F11/04A61F2/18
Inventor 樊伟王振许长建刘新东孙增军
Owner SHANGHAI LISTENT MEDICAL TECH CO LTD
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