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|Title:||Analytical modeling technique for the prediction of coir fiber acoustical behavior|
Hosseini Fouladi, M.
|Citation:||The Proceedings of 3rd Regional Conference in Noise, Vibration and Comfort, 2010 / Nor, M., et al. (ed./s), pp.1-9|
|Conference Name:||3rd Regional Conference in Noise, Vibration and Comfort (NVC) (28 Jun 2010 - 30 Jun 2010 : Putrajaya, Malaysia)|
|M. Ayub, M. J. M. Nor, N. Amin, M. Hosseini Fouladi, R. Zulkifli|
|Abstract:||In this work, analytical modeling technique for evaluating the acoustic absorption of coir fiber is demonstrated. Two types of fiber were investigated fresh coir fiber from wet market and industrially prepared coir fiber mixed with binder. Two different analytical models, namely; Delany-Bazley and Johnson-Allard were used for the analysis. Experiments were conducted in impedance tube on normal incidence sound absorption to validate the results. Results indicate that Delany- Bazley model can justify the overall trend of absorption coefficient of coir fiber, though it can not predict the resonance peak accurately. However, the measured results are found to be in good agreement with the theoretical absorption coefficients obtained by Johnson-Allard Model. In addition, Delaney-Bazley technique can be used for both types of fiber while Johnson-Allard method is compensated for the industrial prepared fiber considering the binder additives. Outcomes show that Johnson-Allard model may be used efficiently for assessing the acoustical behavior of coir fiber. Therefore, it is suggested that the Johnson- Allard model can be implemented to analyze the acoustic absorption of coir fiber for other conditions such as coir fiber with air gap and perforated plate (PP). Keywords: coir fiber; analytical technique; Delaney-Bazley model; rigid frame model; Johnson-Allard model.|
|Rights:||Copyright staus unknown|
|Appears in Collections:||Mechanical Engineering conference papers|
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