Abstract
Noise pollution is a workplace hazard which causes loss of hearing, depending on the sound pressure level and duration of exposure. Because duration of exposure is usually uncontrollable, sound absorbers are used to reduce the value of sound pressure level. A common method to reduce noise is to use porous sound absorbers made out of mineral wools or glass fibres. However, these materials pose health risks and are non-recyclable. This project aimed to fabricate a sound absorber using recycled paper which is in the form of egg cartons as an alternative to the abovementioned fibres. Paper fibres posses high fibre porosity and can be manufactured in a manner which the properties can be easily controlled, making them ideal to be made into sound absorbers. Furthermore, they are biodegradable, do not pose health risks and can be manufactured into different shapes easily. Recycled paper was first turned into pulp, blended and poured into moulds. Different amounts of pulp was compressed until the sample size was approximately 20 mm thick and then dried in a furnace dryer at 60⁰C for 12 hours. The samples were tested using a two-microphone, transfer function impedance tubes according to the ISO 10534-2 standard. Its porosity was determined using a modified wash basin method. The results indicate that the optimum panel has an average noise reduction coefficient, (NRC) of 0.50, which qualifies it to be used as a sound absorbing material. It also encounters its maximum value of 0.98 which occurred at the 1575-1675 Hz range. When compared to other materials, recycled paper has similar properties as coir fibre and is quite comparable to other commercial sound absorbers at the same thickness.
| Original language | English |
|---|---|
| Title of host publication | Applied Mechanics and Materials |
| Publisher | Trans Tech Publications Ltd |
| Pages | 459-463 |
| Number of pages | 5 |
| Volume | 663 |
| ISBN (Print) | 9783038352617 |
| DOIs | |
| Publication status | Published - 2014 |
| Event | 2nd International Conference on Recent Advances in Automotive Engineering and Mobility Research, ReCAR 2013 - Kuala Lumpur Duration: 16 Dec 2013 → 18 Dec 2013 |
Publication series
| Name | Applied Mechanics and Materials |
|---|---|
| Volume | 663 |
| ISSN (Print) | 16609336 |
| ISSN (Electronic) | 16627482 |
Other
| Other | 2nd International Conference on Recent Advances in Automotive Engineering and Mobility Research, ReCAR 2013 |
|---|---|
| City | Kuala Lumpur |
| Period | 16/12/13 → 18/12/13 |
Fingerprint
Keywords
- Impedance tube
- Noise absorption coefficient
- Porous layer
- Recycled paper
ASJC Scopus subject areas
- Engineering(all)
Cite this
Recycled paper fibres as sound absorbing material. / Sim, J. S T; Zulkifli, Rozli; Mat Tahir, M. F.; Sim, J. S T; Zulkifli, R.; Mat Tahir, Mohd Faizal; Elwaleed, A. K.
Applied Mechanics and Materials. Vol. 663 Trans Tech Publications Ltd, 2014. p. 459-463 (Applied Mechanics and Materials; Vol. 663).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Recycled paper fibres as sound absorbing material
AU - Sim, J. S T
AU - Zulkifli, Rozli
AU - Mat Tahir, M. F.
AU - Sim, J. S T
AU - Zulkifli, R.
AU - Mat Tahir, Mohd Faizal
AU - Elwaleed, A. K.
PY - 2014
Y1 - 2014
N2 - Noise pollution is a workplace hazard which causes loss of hearing, depending on the sound pressure level and duration of exposure. Because duration of exposure is usually uncontrollable, sound absorbers are used to reduce the value of sound pressure level. A common method to reduce noise is to use porous sound absorbers made out of mineral wools or glass fibres. However, these materials pose health risks and are non-recyclable. This project aimed to fabricate a sound absorber using recycled paper which is in the form of egg cartons as an alternative to the abovementioned fibres. Paper fibres posses high fibre porosity and can be manufactured in a manner which the properties can be easily controlled, making them ideal to be made into sound absorbers. Furthermore, they are biodegradable, do not pose health risks and can be manufactured into different shapes easily. Recycled paper was first turned into pulp, blended and poured into moulds. Different amounts of pulp was compressed until the sample size was approximately 20 mm thick and then dried in a furnace dryer at 60⁰C for 12 hours. The samples were tested using a two-microphone, transfer function impedance tubes according to the ISO 10534-2 standard. Its porosity was determined using a modified wash basin method. The results indicate that the optimum panel has an average noise reduction coefficient, (NRC) of 0.50, which qualifies it to be used as a sound absorbing material. It also encounters its maximum value of 0.98 which occurred at the 1575-1675 Hz range. When compared to other materials, recycled paper has similar properties as coir fibre and is quite comparable to other commercial sound absorbers at the same thickness.
AB - Noise pollution is a workplace hazard which causes loss of hearing, depending on the sound pressure level and duration of exposure. Because duration of exposure is usually uncontrollable, sound absorbers are used to reduce the value of sound pressure level. A common method to reduce noise is to use porous sound absorbers made out of mineral wools or glass fibres. However, these materials pose health risks and are non-recyclable. This project aimed to fabricate a sound absorber using recycled paper which is in the form of egg cartons as an alternative to the abovementioned fibres. Paper fibres posses high fibre porosity and can be manufactured in a manner which the properties can be easily controlled, making them ideal to be made into sound absorbers. Furthermore, they are biodegradable, do not pose health risks and can be manufactured into different shapes easily. Recycled paper was first turned into pulp, blended and poured into moulds. Different amounts of pulp was compressed until the sample size was approximately 20 mm thick and then dried in a furnace dryer at 60⁰C for 12 hours. The samples were tested using a two-microphone, transfer function impedance tubes according to the ISO 10534-2 standard. Its porosity was determined using a modified wash basin method. The results indicate that the optimum panel has an average noise reduction coefficient, (NRC) of 0.50, which qualifies it to be used as a sound absorbing material. It also encounters its maximum value of 0.98 which occurred at the 1575-1675 Hz range. When compared to other materials, recycled paper has similar properties as coir fibre and is quite comparable to other commercial sound absorbers at the same thickness.
KW - Impedance tube
KW - Noise absorption coefficient
KW - Porous layer
KW - Recycled paper
UR - http://www.scopus.com/inward/record.url?scp=84922041853&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84922041853&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.663.459
DO - 10.4028/www.scientific.net/AMM.663.459
M3 - Conference contribution
SN - 9783038352617
VL - 663
T3 - Applied Mechanics and Materials
SP - 459
EP - 463
BT - Applied Mechanics and Materials
PB - Trans Tech Publications Ltd
ER -