Sound Pollution Effect on Motor Drivers and Auto-Mechanics Using the 7D Sensitivity Index Model

Abstract

This study developed a 7D impact model for the purpose of examining peoples’ perception of noise intensity from selected occupational groups, using the Junior secondary school students as the base line model. It structured “20-29dBA as dictable†“30-49dBA Distinctive†“50-69dBA Disturebing†70-79dBA deterring†“80-89dBA Destructive and “110-160dBA Devastating†Levels. A hypersonic disco set was used to generate these noise level at Ologbu hall N04053¹39.9 E006⁰ 54⁰37.7¹ and discovered that the taxi drivers, mechanics and pump attendants at the filling stations are the most vulnerable to noise impacts. Sixty volunteer participants were randomly selected 10 each to cover market women, taxi drivers, Road side Mechanics, Sciences and Engineering workshop. Staff, University and Secondary School Students. The results were tabulated and the analysis showed high correlation in the group response which validated the model using Pearson Correlation. The discrimination in the group response measure of hearing loss or threshold shift particularly at the detectable level. While the correlation at the destructive, devastating levels are indicative that all the groups appreciate the impact at higher level of noise, irrespective of the initial threshold shift which is the hearing loses. The study bench shift between the 0dBA to 110dBA is found to be 10dBA at + 5 for the taxi drivers, mechanics and pump attendants possible due to indiscriminate horning, electronic sources and traffic.