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서지반출
직선배열 Microphone에 의한 음원의 방향과 주파수의 분석 System
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  • 직선배열 Microphone에 의한 음원의 방향과 주파수의 분석 System
  • DIRECTIVE HARMONIC WAVE DETECTING SYSTEM USING LINEAR MICROPHONE ARRAY
저자명
장지원,안배정인,김천덕,성호건일,CHANG. J.,ABE. M.,KIM. C.,KIDO. K.
간행물명
한국수산학회지: Bulletin of the Korean Fisheries Society
권/호정보
1980년|13권 4호|pp.145-149 (5 pages)
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한국수산학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Various methods have been so far proposed to find out the directions and spectra of sound waves from the sources for provisions of noise controls. The conventional methods are generally classified into three systems such as, single microphone system, moving microphone system and multi-microphone system, which composes a resultant super directivity by giving a appropriate delay and a weighting coefficient in the output of each microphone. In case of using a single microphone there is a difficulty in providing it with desirable super directivity in the low frequency range, while in case of using multi-microphone system there has been a disadvantage that the measurement of directivity could not separately be done with the spectrum analysing. And in case of the use of a moving microphone system it needs a condition that the sound source to be detected should be stationary state and in rest. However here we introduce a method that the spectral analysing and the directivity of synthesis can be separately carried out by using a linear array of many microphones, in which each output of the microphone is multiplied by appropriate weighting coefficient and all of those products are summed after passing through adequate filters. The resultant signal is then sampled with an adequate sampling frequency and taken average for processing.