Study on The Effectiveness of Egg Tray and Coir Fibre as A Sound Absorber

Abstract

Abstract. Sound or noise pollution has become one major issues to the community especially those who lived in the urban areas. It does affect the activity of human life. This excessive noise is mainly caused by machines, traffic, motor vehicles and also any unwanted sounds that coming from outside and even from the inside of the building. Such as a loud music. Therefore, the installation of sound absorption panel is one way to reduce the noise pollution inside a building. The selected material must be a porous and hollow in order to absorb high frequency sound. This study was conducted to evaluate the potential of egg tray and coir fibre as a sound absorption panel. The coir fibre has a good coefficient value which make it suitable as a sound absorption material and can replace the traditional material; syntactic and wooden material. The combination of pyramid shape of egg tray can provide a large surface for uniform sound reflection. This study was conducted by using a panel with size 1 m x 1 m with a thickness of 6 mm. This panel consist of egg tray layer, coir fibre layer and a fabric as a wrapping for the aesthetic value. Room reverberation test has been carried to find the loss of reverberation time (RT). Result shows that, a reverberation time reading is on low frequency, which is 125 Hz to 1600 Hz. Within these frequencies, this panel can shorten the reverberation time of 5.63s to 3.60s. Hence, from this study, it can be concluded that the selected materials have the potential as a good sound absorption panel. The comparison is made with the previous research that used egg tray and kapok as a sound absorption panel.

Waste Egg Tray and Toner-Derived Highly Efficient 3D Solar Evaporator for Freshwater Generation

“…Making egg trays using the pulp molding technology is one of the ways of recycling waste paper, − which are used for transporting eggs from the poultry to restaurants or households and later on either recycled or thrown away. In previous research works, egg trays have been used as a sound absorber or a noise reduction material. − In this paper, waste egg trays have been used as a substrate due to their unique 3D structure and cellulose-based composition. Cellulose contains many hydroxy (−OH) groups that create hydrogen bonds with water and hence has good water-absorbing capability.…”

An IoT aware nature inspired Multilayer Hybrid Dropout Deep-learning paradigm for waste image classification and management

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