Determination of unsafe distance of sound levels from a 65 kVA non-sound proof electric power generator

Abstract

No matter the power rating of a non-sound-proof electric power generator, it can generate sound that adversely affects residents if proper control measures are not implemented. This work presents the determination of unsafe distance of sound levels from a 65 kVA non-sound proof electric power generator for a better environment. All sound levels were measured using a sound level meter while, a distance, x of 5m interval from the generator was maintained using a measuring tape. The background sound levels, L_Bs were taken when the generator was switched off while, the average sound levels, L_Avs were measured when the generator was switched on. The generator sound levels, L_Gs were calculated from the average and background sound levels. Finally, the data obtained were compared with the World Health Organization, (WHO) safety standards. The results showed that L_Av and L_G were not strongly correlated with LB. Here, a linear regression model of a plot of L_Av against L_B had a coefficient of determination, R² = 0.069 while that of a plot of L_G against L_B had a coefficient of determination, R²=0.068. The results revealed that the adverse effects of the generator were beyond a distance of 65 m from it. This is because at x = 65 m, the generator sound level L_G  = 56.9 dBA which was greater than 55 dBA (WHO standard). It is recommended that a 65 kVA power generator of this type be installed from a distance of 70 m in residential areas.