Earticle

초록

영어

This study analyzes the characteristics of sound-absorbing materials made from forest by-products of the deciduous tree species Zelkova serrata (Z. serrata) by evaluating their sound absorption performance. Accordingly, sound-absorbing materials with varying sample thicknesses, leaf sizes, and drying conditions were fabricated. The sound absorption properties were measured using the impedance tube method via middle-type measurement tube (100 Hz-3,200 Hz). The sound absorption properties were evaluated using the average sound absorption coefficient (ASAC), which was calculated from the measured sound absorption coefficients at 250 Hz, 500 Hz, 1,000 Hz, and 2,000 Hz. The ASAC value significantly improved as the leaf size increased to 0.5×0.5 cm2, 1.0×1.0 cm2, and 2.0×2.0 cm2. The ASAC values under the two drying conditions were similar. There was no significant difference in ASAC according to the leaf size under the air-dried leaf condition, with a thickness of 2.50 cm. The highest ASAC value according to the sound-absorbing material thickness was 0.47 at a thickness of 2.50 cm and leaf size of 2.0×2.0 cm2 under the air-dried leaf condition. In addition, the variation in ASAC was 0.23, indicating that the sound absorption performance according to leaf thickness was more significant than the difference in absorption properties according to leaf size. A sound absorption coefficient (SAC) of 0.4 or higher was observed across the measurable frequency band (100 Hz-3,200 Hz). Furthermore, the SAC values with respect to leaf size and thickness were close to 1 in the high-frequency range above 2,000 Hz. Therefore, it is considered that sound-absorbing materials using Z. serrata leaves are advantageous in the field of absorbing noise in a high-frequency band of 2,000 Hz or more, and it is better to manufacture a thickness of 2.50 and 2.0×2.0 cm2.

목차

Abstract
Introduction
Materials and Methods
Preparation of sound absorbing materials
Sound absorption property measurement
Results and Discussion
Sound absorption properties according to the leaf size
Sound absorbing properties according to the thickness
Sound characteristics according to frequency band
Conclusions
References

키워드

저자

• Eunji Bae [ Forest Biomaterials Research Center, National Institute of Forest Science, JinJu 52817, Republic of Korea ]
• Junho Goh [ College of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea ]
• Dahye Yeom [ R&D Project Management & Technology Commercialization Division, Forest R&D support Headquaters, Korea Forestry Promotion Institute, Daejeon 34215, Republic of Korea ]
• Kyungrok Won [ College of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea ]
• Reekeun Kong [ College of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea ]
• Heeseop Byeon [ College of Agriculture & Life Science, Gyeongsang National University; Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  Journal of Forest and Environmental Science [산림과학연구]

• 간기

  계간

• pISSN

  2288-9744

• eISSN

  2288-9752

• 수록기간

  1981~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 526 DDC 634