EVALUATION OF INDUSTRIAL NOISE AT DENKI WIRE/CABLE NIGERIA AND WANWOOD NIGERIA LIMITED, AKURE, ONDO STATE

Abstract

This study is aimed at quantifying noise pollution from industrial noise (machine and human generated) at two selected processing and manufacturing industries namely; Denki Wire & Cable Nigeria Limited and Wanwood Nigeria Limited, both in Akure, Ondo State. The machines used for processing and production in these two industries were considered for the research study as well as their operators and workers. Emphasis was given to noise emitted by the individual industrial machines. The average noise equivalent level (𝐿𝐴𝑒𝑞) was studied to identify the noisy machines and to generate baseline data. A precision grade sound level meter was used to determine the various pressure levels of sound at thirty minutes interval for five days. The various outcomes were statistically analyzed using statistical package for the social sciences (SPSS) Data editor 17.0. Analysis of variance (ANOVA) for simple factor experiment using F-distribution was carried out on the average noise equivalent level. The F- value tabulated and calculated was at 95% confidence level (P<0.05). It was observed that noise limit values were exceeded at almost all machines based on the regulation criteria and international standard. Also, the results of this study shows that the noise control measures were not put in place or where provided they were not adequate in the industries surveyed.