Effect Of Fabric Covers On Improving Sound Absorption

Jamil, Mohamad Hafiz (2017) Effect Of Fabric Covers On Improving Sound Absorption. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, the increasing request for quietness in building and auditoriums has inspired the use and development of the quality of sound absorption material. Textile material such as woven, nonwoven and knitted fabrics is one of the porous materials and has a great ability for sound absorption application. The researchers keep study about the absorptive materials using natural materials but not widely make the research about the acoustics textile. Fabrics usually used to cover the absorptive materials and sometimes using as a decoration but they do not know that each type of fabrics has their own acoustics characteristics. In order to expand the research about the characteristics of acoustics textile, three type of fabrics is used to become a fabric covers on the absorptive materials to find its effects on improving the sound absorption. The three types of fabrics are cotton fabric, plain fabric and satin fabric. This measurement of sound absorption coefficient is conducted by using the impedance tube according to ISO 10534-2. These three types of fabrics are put on the micro-perforated panel (MPP) and three types of natural fibers. The application of air gap enhances the sound absorption coefficient and shifted the peak to the lower frequency region. MPP with the satin fabric cover showed a good sound absorption performance compare with cotton and plain fabric. For the natural fiber, sound absorption performance of coir fiber increased drastically and showed a good absorption performance when put the fabric cover on it where the sound absorption coefficient achieved 0.5 and above in average frequency above 2500 Hz.

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