Suppression of Noise on Brush Cutting Machine

Chiang, Chung Chee (2016) Suppression of Noise on Brush Cutting Machine. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

This project is an industrial project with the objective to reduce the noise that created by a brush cutting machine from Everyday Brush SDN. BHD. The machine generates huge noise while production is running and it does not comply with Department of Organizational Safety and Health (DOSH) requirement. Thus, it endangered operator’s health. To reduce the noise of this machine, the source of the noise must be found. It was found that the source of noise was came from the cutter. The Sound Pressure Level was measured 30cm away from the source and the maximum value measured was 103.5dB or 2.993 Pa. Then, model analysis was done on the blade of the cutter. When the result of model analysis has matched with the frequency analysis, it was proved that the source of noise was came from the blade. There is restriction by the company where any system parameter is not allowed to change (must not affect production line). Hence, a damper was added in between the blade and the fix support. After several times of modification, synthetic rubber ‘Butyl’ (Polyisobutylene) gave the most effective result by successfully reduced the noise to 95.7 dB or 1.219 Pa.