• 제목/요약/키워드: Chun-cheon Citizen's Bell

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춘천시민의 종의 진동 및 음향 특성 (Vibration and Sound Characteristic of the Chun-cheon Citizen's Bell)

  • 김석현;김태형;김윤호;한영호
    • 산업기술연구
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    • 제26권A호
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    • pp.81-88
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    • 2006
  • The Chun-cheon Citizen's Bell was cast in memory of hosting the 2010 world leasure conference and a striking ceremony was held at the city hall on December 31, 2005. In this study, vibration and sound of the bell are measured and the property of the magnificent sound of the bell is scientifically investigated. Frequency components making the sound are identified and how the frequency components decrease with time is observed using waterfall plot(3-dimensional frequency spectrum). Beat characteristics of the hum(1st frequency) and the fundamental(2nd frequency)are examined by experiment. Directivity of the sound radiation of the bell is examined by measuring the vibration and sound in several directions. Duration of the vibration and the sound is estimated using damping ratio.

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