Noise is that annoying and harmful sound that a person cannot hear and cannot tolerate, it is a rough, and irregular sound as it is high-frequency sound and leads to the vibration of the eardrum strongly. In this study, the noise level inside of the Al-Harabi Sweets factory in Benghazi was evaluated, and this was done by measuring the noise level of the machines in the factory (which are the vacuum, the mixer, and the twister) during the morning, and afternoon periods at two positions of each machine, and the results were analyzed by using of a T-test. Analysis of the results showed that all noise levels in this study are below 90 dB, which means that the noise levels do not affect hearing strength based on OSHA standards. The results also showed that there were some significant differences in the average values of noise levels between morning and afternoon periods for each machine in both positions. Some important points were concluded from the results and recommendations were made for any related work to be undertaken in the future.
Keywords: Noise levels, the vacuum, the mixer, the twister, and T-test hypothetical analysis.