Acoustically quality evaluation of date palm samples from the pith to the bark

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Saadtnia M.A.; Sattari n.; ROOHNIA M.; BAHMANI M.

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Journal: IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES Year:2018 | Volume:9 | Issue:1 Page(s): 65-74

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Title

Acoustically quality evaluation of date palm samples from the pith to the bark

Author(s)

Saadtnia M.A. | Sattari n. | ROOHNIA M. | BAHMANI M. | Issue Writer Certificate

Keywords

quality evaluationQ1

acousticallyQ1

date palmQ2

pithQ2

barkQ2

Abstract

This paper investigated the radial variations of acoustical and mechanical properties of date palm from the pith to the bark. Cubic samples with dimensions of 2×2×35 cm3 (Radial× tangential ×longitudinal) were taken in distance of 3, 6, 9, 12 and 15 cm toward the bark. To evaluate dynamical properties of date palm, flexural vibration method was applied on cubic experimental samples. Further the specimen then were utilized for measuring MOE and MOR in static bending test. More details were also attained by anatomical analysis. The results showed that the acoustical parameters of the propagated wave (the internal friction, the acoustic conversion efficiency as well as the acoustical impedance) were constant while increasing the distance between pith and bark. The highest values of acoustic coefficients found for samples near the pith and partially increased while moving to the bark. The density variations were less important in radial direction of date palm disk. The MOE and MOR values varied significantly in the radial direction and were maximum for samples in distance of 3 cm. As they reached to the distance of 15 cm from the center, the given parameters dramatically decreased. Finally it can be concluded that the quality assessment of date palm based on the acoustical parameters is not reliable. While construction materials need more strength, samples from the outer parts of date palm disks are suggested.

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APA: Copy

Saadtnia, M.A., Sattari, n., ROOHNIA, M., & BAHMANI, M.. (2018). Acoustically quality evaluation of date palm samples from the pith to the bark. IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES, 9(1 ), 65-74. SID. https://sid.ir/paper/184288/en

Vancouver: Copy

Saadtnia M.A., Sattari n., ROOHNIA M., BAHMANI M.. Acoustically quality evaluation of date palm samples from the pith to the bark. IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES[Internet]. 2018;9(1 ):65-74. Available from: https://sid.ir/paper/184288/en

IEEE: Copy

M.A. Saadtnia, n. Sattari, M. ROOHNIA, and M. BAHMANI, “Acoustically quality evaluation of date palm samples from the pith to the bark,” IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES, vol. 9, no. 1 , pp. 65–74, 2018, [Online]. Available: https://sid.ir/paper/184288/en

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