The Analysis and Mapping of Factory Equipment Noise on the Worker’s Hearing Power

Hearing loss due to noise is a disturbance in the form of a decrease in the function of the sense of hearing due to
exposure to noise with excessive noise intensity continuously for a long time. This study will observe the extent of noise
disturbance to workers at PTI Company. PTI is one of the largest companies in Indonesia engaged in the cosmetic industry.
In the production process using machine tools that can cause noise, resulting in hearing loss for workers. Contour mapping
of noise distribution was carried out in 2 Plants, namely Plant Jatake 1 (powder and semisolid production) and Plant Jatake
2 (liquid production), as a danger zone to noise between 85 - 103 dB. The research data shows that there are 4 zones that
have a noise level between 86.4 dB-103 dB. This value exceeds the standard set threshold of 85 dB. The determination of
the audiometric test respondents in this study used a purposive sampling technique from 1574 respondents. Noise that
exceeds the threshold value can cause significant hearing loss. The results of Medical Check Up (MCU) observations on
workers in 4 areas whose noise values exceed the threshold indicate that many workers have hearing loss. Factors that can
affect the hearing loss of workers, namely: noise value, MCU test results (audiometry test), age of workers, and years of
service. The results of this study can be used as a reference for companies to improve and reduce hearing loss problems
due to work.