Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Investigation of Sound Absorption Ability of Hinoki Cypress (Chamaecyparis obtusa) Cubes

  • JANG, Eun-Suk (Research Institute of Human Ecology, College of Human Ecology, Jeonbuk National University)
  • Received : 2022.04.27
  • Accepted : 2022.09.08
  • Published : 2022.09.25
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Abstract

Today, commercialized Hinoki cypress cubes are used for fragrance, humidification, and pillows in Korea. In this study, the sound absorption ability of Hinoki cypress (Chamaecyparis obtusa) cubes was examined. The three groups of Hinoki cypress cubes were prepared depending on their dimension (L: 9 × 9 × 9, M: 7 × 7 × 7, S: 4 × 4 × 4 mm). Their sound absorption coefficient was examined after filling 6, 8, 10, and 12 cm height in impedance tubes, respectively. Overall, the sound absorption ability depending on dimension was superior in the M group compared to the L and S groups. Also, as the filling height increased, the sound absorption capacity increased. In sum, noise reduction coefficients (NRC) of all Hinoki cypress cubes were 0.41-0.59. Thus, this research found that Hinoki cypress cubes have a sound-absorbing function.

Keywords

Acknowledgement

This research was supported by a grant from the Basic Science Research Program of the National Research Foundation of Korea (NRF), funded by the Ministry of Education (NRF-2019R1I1A3A02059471). It was also supported by a grant from the international cooperation program framework managed by the NRF (NRF-2020K2 A9A2A08000181). I am also thankful for the ''Business Startup Incubator Support Program'' supported by the Ministry of Education and the National Research Foun- dation of Korea.

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