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http://dx.doi.org/10.7776/ASK.2011.30.4.223

Resonance Condition of the Resonance Cavity and Air Gap in the Sacred Bell of the Great King Seongdeok  

Kim, Seock-Hyun (강원대학교 기계메카트로닉스공학과)
Jeong, Won-Tae (서울대학교 기계항공공학부)
Kang, Yun-June (서울대학교 기계항공공학부)
Abstract
Korean bell is hung with some air gap between the bell bottom and the ground. In addition, it has a peculiar acoustic element, so called resonance cavity below the bell. A proper design of the air gap and cavity size dramatically amplifies the bell sound by resonance effect. Bell interior cavity, air gap and resonance cavity consist of an acoustic cavity system. When the acoustic cavity frequency coincides with the natural frequency of the bell body, the frequency component is significantly amplified. On the Sacred Bell of the Great King Seongdeok, this study proposes a resonance condition of the cavity system considering air gap effect for the first time. With the exact dimension of the bell, boundary element analysis is performed using SYSNOISE. Finally, this study reveals how the temperature in season influences the resonance condition and proposes a concept of variable type resonance cavity. By using the variable type resonance cavity, the cavity size is controlled on site and exact resonance is available regardless of temperature difference in season.
Keywords
Sacred Bell of the Great King Seongdeok; Acoustic Resonance; Resonance Cavity; Air Gap; Boundary Element Analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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