Effect of different types of waste materials used between double glazing box to isolate fatigue test machine noise

Authors

  • Samheri Abdul-Redha Almuradi Faculty of Engineering, Al-Mustansiriyah University

Keywords:

Sound insulation, Waste materials, Air, Rubber, Plastic, Sawdust

Abstract

The earth environment prevention takes the priority in the scientific efforts of countries, communities and research centers nowadays. Related studies show that synthetic waste of plastic (bottles) and rubber (tires) as well as bio-waste of sawdust (trees) has mainly contributed in environmental pollution. Generally most of the latest works are concentrated on using waste materials for thermal insulation. This study examines air, recycled plastic grains, fibers from rubber shreds and sawdust fibers as sound insulation materials to attenuate sound produced from continuous working lab fatigue test machine. These waste materials are filled in between a double glazed-Aluminum framed box. The sound attenuation is tested at three studied 0.5, 1.0 and 1.5 m distances. Since the sound wave is propagated in three dimensions, the experimental work is employed in four upper, fronts, motor and sample fixture side directions. Moreover, the study is extended to examine temperature increase due to enclosing. Tests of sound level are carried out with closed and opened inlet and outlet designed slotting according to box size. Gradual sound attenuation reaches 18, 20, 22 and 25% for air, plastic grains, rubber and sawdust fibers, respectively. The present work proves that waste materials are efficient in noise removal from sound sources. Also, they help the environment cleanliness from disposable bottles and tire wastes and assist the sustainability of earth.

Author Biography

Samheri Abdul-Redha Almuradi, Faculty of Engineering, Al-Mustansiriyah University

Ph. D. Associate Prof., Lecturer and General Supervisor of Applied Research Lab, Mechanical Engineering Department

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Published

2021-10-05