| Summary: | 碩士 === 國立臺灣科技大學 === 建築系 === 97 === The fan-shaped configuration has already been verified as not an ideal solution for music performance space through many different researchers on room acoustics; however, the number of such cases is still expanding worldwide today. The acoustical researchers and designers are therefore acquired to have the ability to deal with the room shape. This is a case based research on a multi-functional small hall at Taipei, studied with computer simulation and 1/30 acoustical scale model, and finally to be confirmed by measurements in the building site. Despite the hall capacity, the wide-opened 90 degrees angle of the room shape ensured this case to be a rare and classical one. There are two sections in the reference review: the first contents a rediscover of the fan-shaped hall, and a collection of several important findings and publishes on the acoustics of this configuration; the second is a case study of eight overseas halls with different capacities. The destined acoustical defects with this configuration such as focusing, uneven sound distribution, tone coloration, lack of reverberant and spatial impression, and the related available acoustical design strategies were then discussed.
Four types of wall design for lateral reflections, and five different ceiling heights, were studied with the computer simulations. Thus the diffused side and rear wall reflectors, and several tilted partitions under the ceiling, were decided as most effective strategies. They were installed in the scale model with the AC ducts and stage wall reflectors, in eight steps. The acoustical contributions or influences of each element were then checked.
Although the final interior design of the case was partially altered, that the ceiling panels and thick blanket were installed, the site measurement still shows certain good agreement with our experiments. Again the selected strategies were proved to be successful.
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