An analysis of the effectiveness of noise-induced hearing loss control strategies: a case study of Zimbabwe power company - Kariba South Power station · Electronic Theses and Dissertations

Author

Katyamaenza, Ropafadzo

Title

An analysis of the effectiveness of noise-induced hearing loss control strategies: a case study of Zimbabwe power company - Kariba South Power station

Abstract

Studies on noise-induced hearing loss have been conducted in Zimbabwe, but there is no evidence of similar research being done in hydro power industries. The objectives of this research was to (1) to determine the effectiveness of the existing noise control strategies at ZPC-Kariba, (2) to determine and assess the noise production areas, (3) to explore possible ways of reducing Noise Induced Hearing Loss at ZPC Kariba. Data was collected through questionnaires to identify hazards and measure noise levels using a sound level meter. The sample group included employees from various work sections such as mechanical engineering, electrical engineering, SHE, Human Resource, Garage, Finance, Loss Control, and Stores. The research utilized questionnaires, noise measurements, and observations to gather necessary data. A total of 129 questionnaires were distributed to evaluate employees’ awareness of common noise hazards and noise-induced hearing loss but only 102 questionnaires were answered. Descriptive analysis was conducted using SPSS version 22 to determine frequencies and percentiles. Results indicated common noise issues such as ringing in the ears (4.9%), pain (13.7%), and difficulty hearing ordinary speech (14.8%). The study findings revealed that noise levels at ZPC-Kariba often exceed the legal limit of 90dB, with areas like turbines reaching 110dB, spillways at 100dB, intakes at 99dB, and penstocks at 94dB. Therefore, it is unsafe to work without noise reduction interventions in place. The study recommended the use of earplugs, earmuffs, and noise reduction techniques as common preventive measures. It also suggested implementing engineering controls by redesigning the workplace, tools, and equipment, as well as utilizing administrative controls through preventive programs and noise-induced hearing loss training. Monitoring and evaluating control measures through regular audits and feedback mechanisms were also recommended by the study.

Date

2024

Publisher

BUSE

Keywords

Noise-induced hearing, Power company, Kariba

Supervisor

Mr. Chiboiwa