Abstract
This paper presents the improvement methods to increase sound absorption performance of polyethylene based nonwoven fabric (PNF). The methods are placing a woven fabric in front of the sample as well as providing air cavity behind the sample. The samples were experimentally tested in an impedance tube based on ISO 10354-2:2001 whereby two microphones are used and the transfer matrix methods are employed. From the results, it can be seen that placing front woven fabric effectively increases sound absorption performance. Moreover, introducing air cavity gap behind the sample is also found to be more significant to increase sound absorption.
Highlights
The nonwoven industry has changed and grown rapidly since its beginning decades ago
Nonwoven fabric has been widely applied for interior cabin materials [2 – 3]. This is due to the good acoustical performances of the nonwoven fabric which provides good insulation from noise sources
The recorded signal was processed in the ACUPRO software and all the result was presented in one-third octave band frequency
Summary
The nonwoven industry has changed and grown rapidly since its beginning decades ago. The growth is including expansion with many other technologies and applications in textile industry [1]. Nonwoven fabric has been widely applied for interior cabin materials [2 – 3] This is due to the good acoustical performances of the nonwoven fabric which provides good insulation from noise sources. Korkmaz (2012) study the effect of physical parameters i.e. thickness, weight per unit area, air permeability on the sound absorption performance. Shimizu and Koizumi (2015) conduct a compatibility study of a nonwoven fabric that is installed as gap and slits cover It is thin, but the result shows that the nonwoven cover provides good sound insulation without distracting flow resistivity [10]. This paper, investigates the effect of another physical parameter i.e. air back cavity as well as additional front woven fabric cover purposely to improve the sound absorption performance of nonwoven fabric
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