D. Biswal1 and *S. Rout2
1Forest Research Institute (Deemed) University, Deradhun- 248006 (Uttarakhand) INDIA.
2School of Forestry & Environment, Sam Higginbottom Institute of Agriculture Technology & Sciences, Allahabad-211007 (Uttar Pradesh) INDIA.
Email: srout.forestry@gmail.com
Received-17.10.2015, Revised-26.10.2015
Abstract: Wood and wood-base materials frequently are used as interior finish in buildings where sound absorption (reduction of the level of sound generated in a room, within that room) needs to be estimated to compare the effectiveness of different species. Various wood based materials of three Indian timbers (Dalbergia sissoo, Cedrus deodara and Populus deltoids) were evaluated for acoustical absorption using the Bureau of Indian Standard (I.S: 10420 -1982) impedance tube method to determine the effect of moisture content based on their specific gravity on sound absorption. Absorption produced by different species at 25 and 35 percent moisture content at room temperature was affected. Cedrus deodara species shown best value for sound absorption coefficient at the frequency level of 1000 hertz while the Populus deltoids shown minimum values of sound absorption coefficient.
Keywords: Absorption, Cedrus deodara, Specific gravity
REFERENCES
Bernaek, L. (1962). Music, Acoustics and architectures. Wiley. New York.
Cremer, L.and Muller, H.A. (1982). Principles an application of room acouistics, volume ½. Applied science. London.
Egan, D. (1988). Architectural Acoustics. Mc Grawhill. New York.
Freas, A.D. (1989). Building with wood In: Schniewind AP (ed) Concise encyclopedia of wood and wood based materials. Pergamon Press. Oxford. pp 31-37.
Hui, J.Z.,Zhao,J.R. and Hua,B.F.(2004).Sound absorption property of wood for five Eucalypts species. Journal of Forestry Research. 15(3):207-210.
Kollman, F.F.P. and Cote, W.A. (1968). Principles of wood science and technology. Springer, Berlin Heidelberg. New York.