Speed estimation of sound-emitted objects through convergence of sound information analysis and smart device technology

음향 정보 분석과 스마트 기기 기술의 융합을 통한 사물의 속력 측정

  • Nam, Yong-Wook (Department of Computer Science, Kwangwoon University) ;
  • Kim, Yong-Hyuk (Department of Computer Science, Kwangwoon University)
  • 남용욱 (광운대학교 컴퓨터과학과) ;
  • 김용혁 (광운대학교 컴퓨터과학과)
  • Received : 2015.08.26
  • Accepted : 2015.10.20
  • Published : 2015.10.31


In this paper, we present an algorithm that estimates the speed of a moving object only using its sound information. In general, the speed gun projects the incident light onto a moving object and measures the frequency variation of the scattered light. Then the speed is measured by this frequency difference. In our study, instead of light information, we measure the speed by sound frequency difference when the object is coming and moving away. In our experiments on the speed measurement, on average the error of 6.08% was obtained. Utilizing this algorithm for smart device, we can measure the speed of a moving object without sensor that measures the frequency of the light.


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