News

a.z
Nourbakhsh, A., Hosseinzadeh, A., Golbabaei, F., Kargarfard, A. (2001). ACOUSTICAL PROPERTIES OF WOOD IN 2000, 4000 AND 8000 IN HERTZ FERQUENCIES. , 14(14-No. 272), 27-47. doi: 10.22092/ijwpr.2018.117505
Amir Nourbakhsh; Abdolrahman Hosseinzadeh; Fardad Golbabaei; Abolfazl Kargarfard. "ACOUSTICAL PROPERTIES OF WOOD IN 2000, 4000 AND 8000 IN HERTZ FERQUENCIES". , 14, 14-No. 272, 2001, 27-47. doi: 10.22092/ijwpr.2018.117505
Nourbakhsh, A., Hosseinzadeh, A., Golbabaei, F., Kargarfard, A. (2001). 'ACOUSTICAL PROPERTIES OF WOOD IN 2000, 4000 AND 8000 IN HERTZ FERQUENCIES', , 14(14-No. 272), pp. 27-47. doi: 10.22092/ijwpr.2018.117505
Nourbakhsh, A., Hosseinzadeh, A., Golbabaei, F., Kargarfard, A. ACOUSTICAL PROPERTIES OF WOOD IN 2000, 4000 AND 8000 IN HERTZ FERQUENCIES. , 2001; 14(14-No. 272): 27-47. doi: 10.22092/ijwpr.2018.117505

ACOUSTICAL PROPERTIES OF WOOD IN 2000, 4000 AND 8000 IN HERTZ FERQUENCIES

تحقیقات علوم چوب و کاغذ ایران
Article 2, Volume 14, 14-No. 272, May 2002, Pages 27-47    PDF (2.48 M)
Document Type: Research Paper
DOI: 10.22092/ijwpr.2018.117505
Authors
Amir Nourbakhsh1; Abdolrahman Hosseinzadeh2; Fardad Golbabaei3; Abolfazl Kargarfard4
1Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran
2Wood and forest products division, Research Institute of Forests and Rangelands, Agricultural Resear
3Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO) P.O. Box 13185-116, Tehran, Iran
4Wood and Forest Products Science Research Division, Research Institute of Forests and Rangelands, Tehran, Iran,
Abstract
In this research solid wood properties of sound absorption coefficient in over frequency were investigated. Sound absorption at 2000, 4000 and 8000 in Hertz Frequencies was measured on the influence of effective factors in solid wood. Solid wood variable factors were species (Beech, Poplar and Alder), fiber direction (Longitudinal, Radial and Tangential) and Frequencies (2000, 4000 and 8000 in hertz). Data was analyzed using factorial experimental design at completely random blocks and DMRT test. The measurements were taken using the sound absorption with standing waves apparatus type 4002. The results of this research indicate that sound absorption at frequencies 2000, 4000 and 8000 in hertz were in maximum level for poplar wood. Longitudinal direction in solid wood had sound absorption maximum levels. Radial and Tangential direction have less sound absorption than Longitudinal direction respectively. Therefore this investigation showed that sound absorption with increasing frequency of 2000 to 8000 hertz, maximum level was considered.
Keywords
beech; Poplar; ALDER; Frequency; SOUND ABSORPTION COEFFICIENT; FIBER DIRECTION
References
Statistics
Article View: 520
PDF Download: 440


counter
Journal management system. designed by sinaweb