EFFECT OF ACOUSTIC MATERIAL CEILING TO SPEECH PERFORMANCE OF CONVENTION HALL

Muhammad Saladin Prawirasasra

Abstract

During design process of auditorium, mostly, acoustics design was neglected by engineers therefore it may cause inappropriate acoustic condition. Evaluation of acoustic comfort was carried out through measurement of speech parameters such as Noise rating (NR), reverberation time and definition (D50). According to measurement result, performance of convention hall is not sufficient to perform speech activities since it has 0.4-13.7 s of reverberation time and 1.6-42.6% of D50. To improve acoustic performance, modification is applied on ceiling materials using combination of two different acoustic materials – absorber and diffusor, through simulation.. The result has shown that installment of full absorber at ceiling with high absorbtive coefficient could reduce early energy reflection which causes lower reverberation time and higher definition. Whenever ceiling are made of combination of two type of materials, the position of di on ceiling depend on diffusor orientation. Spread diffusor has better performance rather than centralized diffusor. However, the acoustic performance of convention hall remains the same.


Keywords

speech,;improve,;modification;ceiling,;simulation

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References

Bo, E., Kostara-Konstaninou, E., Lepore, F., Shtrepi, L., Puglisi, G.E., Astolfi, A. 2016. Acoustic Characterization of the Ancient Theatre of Tyndaris: Evaluation and Proposals for its Reuse. 23rd International Congress on Sounds & Vibration, Greece.

Boren, B.B., Longair M. 2012. Acoustic Simulation of the Church of San Fransicso della Vigna. 164th Meeting of The Acoustical Society of America.

Cirillo, E., Martellotta, F. 2003. Acoustics of Apulian-Romanesque Churches: Correlations Between Architectural and Acoustic Parameters. Building Acoustic, 10(1):55-76

Cox, T.J. 2009. Acoustic Absorbers and Diffusers: Theory Design and Application. John Wiley & Sons Inc.

Egan, M.D. 2007. Architectural Acoustics. McGraw-Hill Custom Publishing.

Iannace, G., Trematerra, A. 2017. Study on the Effects of the Harmonic Choir Stalls in The Church of the Certosa di San Martino in Naples. Building Acoustic 24(3), 159-72.

Iannace, G., Di Gabriele, M. Sicurella, F. 2016. Sound Focusing Effects in Horseshoe Plan Theater. Building Acoustics, 10(2):117-33.

Mahdavi, A., Kainrath, B., Orehonuig, K., Lechleitner, J. 2008. Measurement and Simulation of Room Acoustics Parameters in Traditional and Modern Bath Buildings. Building Simulation, 1(3), 223-233.

Marshall, L.G. 2014. An Acoustic Measurement Program for Evaluating Auditorium Based on The Early/Late Sound Energy Ratio. Journal of The Acoustical Society of America, 96, 2551-2261.

Prodi, N. Marsilo, M. 2003. On the Effect of Domed Ceiling in Worship Spaces: A Scale Model Study of a Mosque. Building Acoustics, 10(2):117-33.

Salter, C., Powell, K., Begault, D. 2003. Case Studies of a Method for Predicting Speech Privacy in The Contemporary Workplace. Summary Report.

Schmidt, A., M., D., Kirkegaard, P.H. 2005. From Architectural Acoustic to Acoustic Architectural Using Computer Simulation. Building Acoustic, 12(2), 85-98.

Su, Z., Yilmazer, S. 2005. The Acoustical Performance Analysis of Bilkent Amphitheater: Proposal for Acoustical Renovation. Architectural Science Review 49(2): 167-178.

Yilmaz, T. 2005. Acoustical Analysis of a Multipurpose Hall by Computer Simulation Method: Metu Northern Cyprus Campus Auditorium (NCCA) as Case Study. (Doctoral dissertation, Middle East Technical University).

DOI: https://doi.org/10.20961/arst.v16i2.22324

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