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도로 소음 저감을 위한 능동소음제어 시스템의 개발 및 기초실험

Development and Basic Experiment of Active Noise Control System for Reduction of Road Noise

  • 문학룡 (한국건설기술연구원 도로교통연구실) ;
  • 강원평 (한국건설기술연구원 도로교통연구실) ;
  • 임유진 (한국건설기술연구원 도로교통연구실)
  • 투고 : 2013.10.23
  • 심사 : 2013.11.18
  • 발행 : 2013.12.17

초록

PURPOSES : The purpose of this study is about noise which is generated from roads and is consist of irregular frequency variation from low frequency to various band. The existing methods of noise reduction are sound barrier that uses insulation material and absorbing material or have applied passive technology of noise reduction by devices. The total frequency band is needed to apply active noise control. METHODS : In this study applies to the field of road traffic environment, signal processing controller and various analog signal input/output, the amplifier module is based on parallel-core embedded processor designed. DSP performs the control algorithm of the road traffic noise. Noise sources in the open space performance of evaluation were applied. In this study, controller of active signal processor was designed based on the module of audio input/output and main controller of embedded process. The controller of active signal processor operates noise reduction algorithm and performance tests of noise reduction in inside and outside environment were executed. RESULTS : The signal processing controller with OMAP-L137 parallel-core processors as the center, DSP processors in the active control operations dealt with quickly. To maximize the operation speed of an object and ARM processor is external function keys and display for functions and evaluating the performance management system was designed for the purpose of the interface. Therefore the reduction of road traffic noise has established an electronic controller-based noise reduction. CONCLUSIONS : It is shown that noise reduction is effective in the case of pour tonal sound and complex tonal sound below 500Hz by appling to Fx-LMS.

키워드

참고문헌

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