Abstract
Acoustical design of a convention center into a recital hall of Sejong Performing Arts Center located in Seoul, Korea was carried out to renovate its function. The area of the convention space is about 612 m2 and it is mainly used for meetings, symposia, and so on. The volume of the existing hall is limited to 3100 m3, which causes lack of late reflections, due to its structural limitations. Therefore, the existing ceiling slab was designed to be pulled up so that a new ceiling can create extra volume of 1000 m3. A leaf-shaped floor plan and tilted side balconies within 16-m width between side walls were designed to adequately increase enough lateral reflection and spatial impression. The inclined side wall of 1:10 slope was proposed through the comparison with different angles of walls. The saw-tooth-shaped GFRC (glass fiber reinforced concrete) wall reflectors and center protruded stage rear wall are designed for sound diffusion. From the results of computer and scale modeling, it was predicted that the new space will have adequate reverberation time of 1.5 s and a uniform distribution of sound-pressure levels within 3 dB.
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