Abstract
Empty fruit bunch fibre (EFB) and mesocarp fibre (MF) have been used in the fabrication of a new acoustic panel as a sound absorber for building. Measurements were carried out following ISO 354 in the mini reverberation chamber and the sound absorption performance of EFBMF acoustic panels were rated based on ISO 11654. Measurements of the new EFBMF acoustic panel involves five panel designs of 100 EFB dust panels, 80:20 dust panels, 100MF coir panels, 90:10 coir panels and 50:50 coir panels with 5 cm of initial thickness. Results showed that 100MF coir panel achieved αw of 0.90 coefficient and was rated as Class A absorber followed by 90:10 coir panels with αw of 0.85 coefficient and 100 EFB dust, 80:20 dust and 50:50 coir panels having αw of 0.80 coefficients and been rated as Class B absorber. This research has successfully defined that EFB and MF are viable to be used as raw fibre for acoustic absorber for building.
Highlights
In the acoustic measurement for sound absorption of a building material, reverberation room method or ISO 354 [1] is often used
Even though an absorption coefficient of any material could be obtained from the normal wave incidence testing, but in many practical applications the random incidence testing is desired [2]
Random incidence test method requires materials to be tested in a reverberation chamber to specify the sound absorption performance
Summary
In the acoustic measurement for sound absorption of a building material, reverberation room method or ISO 354 [1] is often used. Even though an absorption coefficient of any material could be obtained from the normal wave incidence testing, but in many practical applications the random incidence testing is desired [2]. Random incidence test method requires materials to be tested in a reverberation chamber to specify the sound absorption performance. Reverberation room method utilized Sabine’s formula as shown by Equation 1 to define the sound absorption coefficient value ( s) of a material at specific one-third-octave band of frequency. The range of frequencies for reverberation room testing was in between 100 Hz to 5000 Hz as been specified in the ISO 266: 1997 [3]. Reverberation time is defined as the time required by the sound pressure level to decay by 60 dB after the sound source has stopped with RT60 or T60 symbol normally been used to represent the value
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
