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Development of portable noise-cancelling microphone system based on FM1182 chip

  • 2013-12-06
  • 544.38KB
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        In order to improve the quality of voice signals and reduce the interference of background noise during voice pickup, a system with FM1182 as the core chip was designed. The system uses dual microphone pickup technology. The two signals picked up are voice signals mixed with background noise and pure noise signals. After low-noise preamplification, they enter the DSP chip for noise reduction operation. The chip uses the AMBIN algorithm. The test results of the actual circuit show that the voice signal buried in the noise signal is successfully extracted. The system has the characteristics of high integration, portability and low cost. It maintains ultra-low power consumption while ensuring high noise processing efficiency. The noise reduction effect is very obvious and has a wide noise processing range.

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