Hearing aid device and method for separating and positioning sound sources in noise environments

A hearing aid device, a technology for the location of sound sources, used in hearing aids, speech analysis, instruments, etc.

Active Publication Date: 2014-09-17
CHONGQING UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0003] Aiming at the above-mentioned problems existing in the prior art, the technical problem solved by the present invention is: to realize the automatic separation of the vo...

Method used

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  • Hearing aid device and method for separating and positioning sound sources in noise environments
  • Hearing aid device and method for separating and positioning sound sources in noise environments
  • Hearing aid device and method for separating and positioning sound sources in noise environments

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Embodiment

[0094] Example: such as Figure 4 As shown, the microphone array 4001 is composed of 8 miniature microphones (CMA-4544PF-W). The diameter of the miniature microphone is 9.7mm. Composed of a fourth-order high-pass filter and a fourth-order low-pass filter composed of OP07, the cut-off frequency of the high-pass filter is 20Hz, the cut-off frequency of the low-pass filter is 20KHz, the analog switch 4004 and the analog / digital converter are realized by LTC1867, and the internal Contains an 8-channel analog input switch and a 16-bit A / D converter, communicates with the microprocessor 4006 through a serial interface to realize channel selection and data acquisition, and the microprocessor 4006 uses a 16-bit 25MHz ultra-low power consumption Microprocessor (MSP430F5529), the keyboard uses 3 independent keys to realize the sound source selection and volume increase and decrease control functions, and the liquid crystal display adopts a low-power black and white liquid crystal displa...

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Abstract

The invention relates to a hearing aid device and method, in particular to the hearing aid device and method for separating and positioning sound sources in noise environments. The hearing aid device comprises a microphone array, a sound source position displayer, a sound source separating and positioning module, a signal collector, an analog signal amplifier and a sound source selection keyboard. The sound source separating and positioning module adopts a cross-correlation method to process the collected microphone signals to obtain eight initial positions of the sound sources relative to the microphone array, the collected microphone signals are processed through a blind source separation method based on space search to obtain sound sources containing voices of a talker and other persons, a user selects out the sound sources containing voices of the talker through the sound source selection keyboard and computes the accurate position of the talker relative to the microphone array according to the selected sound source, and the position of the sound source is displayed in the sound source position displayer. By means of the hearing aid device and method, voice signals of two persons involving in the conversations in the noise environments can be separated automatically, and a positioning function of a sound signal source is added. Furthermore, the hearing aid device and method for separating and positioning sound sources in noise environments are convenient to use.

Description

technical field [0001] The invention relates to a hearing aid device and a method, in particular to a hearing aid device and a method for separating and locating a sound source in a noise environment. Background technique [0002] In voice communication in noisy environments such as outdoors or industrial sites, hearing aids are important devices to enhance voice quality and improve communication effects. In a noisy environment, useful signals that users are interested in will be interfered by environmental noise or other voices, and the signal-to-noise ratio of useful signals is low, which seriously affects the normal communication between users. Most of the existing hearing aids still use a simple signal amplification function, and a few devices with clear voice functions are only effective against environmental background noise, and are powerless to interfere with other voices in the communication scene. Contents of the invention [0003] Aiming at the above-mentioned ...

Claims

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Application Information

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IPC IPC(8): H04R25/00H04R27/02G10L21/0272
Inventor 柴毅屈剑锋王坤朋杨志敏董勇
Owner CHONGQING UNIV
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