Fig. 1. Exterior view of SH high school Egbert W. Smith auditorium.
Fig. 2. Interior view of SH high school Egbert W. Smith auditorium before renovation (above: view from the stage, below: view from the rear seat).
Fig. 3. Architectural drawings of SH high school Egbert W. Smith auditorium before renovation (above: main floor plan, below: cross-section).
Fig. 4. Examples of Schroeder curves measured in SH high school Egbert W. Smith auditorium.
Fig. 5. Optimum reverberation time at 500 Hz considering volume.
Fig. 6. Architectural drawings of SH high school Egbert W. Smith auditorium after renovation (above: main floor plan, below: cross-section).
Fig. 7. 3D CATT-Acoustics model for SH high school Egbert W. Smith auditorium.
Fig. 8. Cross-sections of two different types of wall diffusers employed in SH high school Egbert W. Smith auditorium (the numbers on the top of the diffuser section indicate the height of each section in cm).
Fig. 9. Predicted random incidence scattering coefficients for two different types of wall diffusers used in SH high school Egbert W. Smith auditorium.
Fig. 10. Raised step floors were applied to the last two seating blocks (10 rows per each block).
Fig. 12. Measurement positions for evaluating the acoustics of the auditorium after renovation.
Fig. 11. Interior view of SH high school Egbert W. Smith auditorium after renovation (above: view from the stage, below: view from the rear seat).
Fig. 13. Measured T30 and BR in SH high school Egbert W. Smith auditorium (room average ± standard deviation).
Fig. 14. Measured D50 and C80 in SH high school Egbert W. Smith auditorium (room average ± standard deviation).
Fig. 15. Measured LFC and G in SH high school Egbert W. Smith auditorium (room average ± standard deviation).
Table 1. Architectural dimensions of the auditorium.
Table 2. Unoccupied room acoustic parameters measured in SH high school Egbert W. Smith auditorium before renovation.
Table 3. Target ranges of room acoustic parameters for the renovation(mid denotes arithmetic mean of 500 Hz and 1,000 Hz values).
Table 4. Equipment used for the measurement.
참고문헌
- H. -j. Chi, J. -R. Lee, and S. -Hong. Lee, "A Study on Design and Practical use of Multi-purpose Auditorium With priority given to Variable application in Educational Facility," J. Korea Institute of Educational Facilities, 21, 5-17 (2005).
- Cultural Heritage Administration of Korea, "Jeonju Shinheung High School Auditorium and main building porch," Survey Rep., 2010.
- ISO 3382-1:2009, Acoustics - Measurement of room acoustic parameters - Part 1: Performance spaces, 2009.
- L. L. Beranek and T. Hidaka. "Sound absorption in concert halls by seats, occupied and unoccupied, and by the hall's interior surfaces," J. Acoust. Soc. Am. 104, 3169-3177 (1999). https://doi.org/10.1121/1.423957
- R. E. Apfel, Deaf Architects & Blind Acousticians? A Guide to the Principles of Sound Design (Apple Enterprises Press, New Haven, 1998), pp. 45-46.
- L. Beranek, Concert and Opera Halls: How They Sound (Acoustical Society of America, New York, 1996), pp. 512-517.
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- M. Vorlander and E. Mommertz, "Definition and Measurement of Random-Incidence Scattering Coefficients," Applied Acoustics, 187-199 (2000).
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