Reverberation Time (RT) is an important parameter of indoor acoustical design. In the past, many theories believed that the RT ratio of low frequency (125-250Hz) to an intermediate frequency (500-1000Hz) can provide the fullness of the hall, thus low-frequency RT was often higher than the high-frequency in acoustical design. However, in recent years, studies have suggested that too long a low-frequency RT may influent the extremely important mid-range and high-frequency clarity, affecting language clarity (C50) or music clarity (C80), and the design of low-frequency RT should be reduced. The objective of this study is to combine the perforated plate resonance theory with the film resonance theory to develop a new type of plate-membrane resonance sound absorber. This process of study will be divided into two stages, including product development and simulation. The product development stage combines metal expansion net products and oil painting fabrics and changes the structure including the enclosed air layer to develop the absorber. In the field simulation stage, a convention hall of National Cheng Kung University will be used for acoustic diagnosis and improvement suggestions. The building acoustic simulation software EASE will be used to analyze the improvement strategies and benefits.
|Effective start/end date||20-11-01 → 21-10-31|
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