흡음과 확산을 고려한 알루미늄 프로파일의 음향특성 연구 = Research on Acoustic Characteristics of Aluminum Profiles Consideration Absorption and Scattering

다국어 초록 (Multilingual Abstract)

To control the room acoustics of a multipurpose hall, finishing materials that can control the absorption and diffusion properties are needed. This study uses aluminum profiles to investigate the sound absorption and diffusion properties as air space increases in differing diffusion forms. Sound absorption coefficient was measured using the impedance tube method and reverberation room method. Also, the scattering coefficients depending on the aluminum profiles were measured in a scaled reverberation room (1/5 scale). The impedance tube method sound absorption coefficient increased in the low-mid frequency ranges (800-100 ㎐) where the aluminum profile and the increase in air space acted as a resonance type absorber. The sound absorption coefficient measured by the reverberation room method increased in the low-mid frequency ranges (630-800 ㎐), which is lower than the resonant frequency, as the back air space was increased from 40 ㎜ to 150 ㎜. Air space increases sound absorption in the frequency ranges over the resonant frequency (2000-4000 ㎐), and also decreases the difference in sound absorption coefficients in various frequencies. Scattering coefficient was over 0.5-0.65, similar to the scattering coefficient at high frequency ranges (over 2000 ㎐) in a semi-sphere. Therefore, it shows that Aluminum Profiles are effective as profile acoustical diffusers when considering both absorption and scattering performances.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 연구 방법
• 3. 측정결과 및 해석
• 4. 결론
• 인용문헌

참고문헌 (Reference)

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