Minitype microphone array device and beam forming method thereof

A microphone array and microphone technology, applied in sensor parts, sensors, electrical components, etc., can solve the problems of complex microphone structure and poor noise suppression effect, and achieve the effect of noise suppression, noise elimination and high efficiency

Inactive Publication Date: 2009-06-24
瑞声声学科技(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structure of the array microphone is

Method used

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  • Minitype microphone array device and beam forming method thereof
  • Minitype microphone array device and beam forming method thereof
  • Minitype microphone array device and beam forming method thereof

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] The array microphone device in the embodiment of the present invention includes a DSP chip processor, a unidirectional microphone and an omnidirectional microphone. The operation of the present invention is realized by a hardware DSP chip processor. The DSP chip includes input ports and output ports. The unidirectional microphone and the omnidirectional microphone are connected to the input port of the DSP chip processor, and are arranged side by side with each other, and their sound inlet holes face the same direction.

[0027] The DSP chip processor is integrated with: two energy statistics device modules, a comparator module, and an adaptive filter module. DSP can adopt the ADSP-21161 development board of American ADI Company.

[0028] The energy statistics device module is used to count the energy of the sound signal received by the unidir...

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Abstract

The invention provides a microphone array device and a beam forming method thereof. The microphone array device can effectively eliminate noise and realize the directive property of a conical beam. Compared with prior art, the invention restrains the noise by controlling the updating of the coefficient of a self-adapting filter with the coefficient a, and the efficiency is pretty high.

Description

【Technical field】 [0001] The present invention relates to a microphone device, in particular to a small array microphone device and a beam forming method thereof. 【Background technique】 [0002] In recent years, voice control, voice input, and voice-activated applications have become increasingly popular in many systems such as microphone microphones, voice pickup devices in mobile communication devices, car positioning systems, etc. However, in a real environment, due to the influence of noise and interference, the efficiency of the speech recognition mechanism is reduced, so that the current speech recognition technology cannot be optimized. [0003] In order to eliminate the interference of environmental noise, known technical processing methods include the use of a unidirectional microphone as a voice pickup device, through which the unidirectional microphone picks up an effective sound source within a range of high sensitivity. However, unidirectional type microphones ...

Claims

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Application Information

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IPC IPC(8): H04R3/00
Inventor 唐淇
Owner 瑞声声学科技(常州)有限公司
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