Pretreatment system for strengthening directional voice at front end of electronic cochlear implant

A technology of speech enhancement and cochlear implantation, applied in speech analysis, instruments, etc., can solve the problem of insufficient information in the collection channel, and achieve the effect of high use value and promotion significance

Inactive Publication Date: 2010-08-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent directly uses an omnidirectional microphone, a directional microphone, and two microphones, it is only two ways of collecting information, and the information of the collection channel is insufficient. A single microphone that does not use a TP microphone directly contains omnidirectional output and directional output. have an advantage

Method used

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  • Pretreatment system for strengthening directional voice at front end of electronic cochlear implant
  • Pretreatment system for strengthening directional voice at front end of electronic cochlear implant
  • Pretreatment system for strengthening directional voice at front end of electronic cochlear implant

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Embodiment Construction

[0044] The system is composed of hardware circuit and software part for controlling sound card acquisition, see figure 1 . Two microphones are placed at the front end to collect sound signals. The pre-conditioning circuit is composed of a first-stage pre-amplifier circuit, a band-pass filter circuit and a second-stage amplifier circuit. The power supply of the entire system uses an adapter to provide DC power, and then outputs it through a dual power supply. The module provides +12V and -12V voltages to the amplifier chip; and the precise 1.3V voltage required by the microphone is provided by a reference voltage chip REF2912. After the collected voice signal is processed by the pre-conditioning circuit, the Codec chip inside the USB external sound card completes the analog-to-digital conversion, and finally transmits it to the computer through USB communication for subsequent processing and algorithm research.

[0045] Due to the strict size limitation of cochlear implants, t...

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Abstract

The invention relates to a directional voice strengthening system at the front end of an electronic cochlear implant, belonging to the human physiological signal treatment field. The invention is characterized in that the directional voice strengthening system at the front end of an electronic cochlear implant comprises a microphone array, an A/D circuit, a power supply circuit and a ripple steady voltage conditioning circuit, wherein the microphone array consists of two TP type mini-sized microphone modules; the A/D circuit consists of a preamplifier circuit, a band-pass filter circuit, a back stage amplifying circuit and a USB external sound card; and the power supply circuit respectively supplies power for the whole system chip and the microphones. The invention uses the closely-spaced TP mini-sized microphone modules simultaneously comprising omnidirectional and directional collection to strengthen the voice at the front end of the electronic cochlear implant and be used for researching algorithms of improving speech discrimination score.

Description

technical field [0001] The invention belongs to the technical fields of electronics, computer and signal processing, and in particular relates to a directional speech enhancement system at the front end of an electronic cochlear based on a double TP type miniature microphone, so as to improve the accuracy of the voice signal transmitted to the electronic cochlear user in a noisy environment. Signal-to-noise ratio, and used to study methods to improve speech recognition rate. Background technique [0002] There are more than 27 million deaf disabled patients in my country, and 30,000 new deaf children are added every year. Deaf patients are the most common among the five most common disabilities (intelligence, vision, limbs, spirit and hearing). Cochlear implants are currently the only way to restore hearing to patients with severe or total deafness. Cochlear implant users can basically communicate without barriers in a quiet environment, but in noisy environments, especiall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/028
Inventor 宫琴陈又圣关添
Owner TSINGHUA UNIV
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