Abstract

This study examined outdoor noise levels in 20 selected geo-referenced locations within two Local Government areas (LGAs); Oredo and Egor and the consequent generation of 2D spatial noise maps for the respective sampled areas. A digital sound level metre was used to obtain duplicate noise values once monthly for a two-month period (June and July, 2023) at the randomly selected sampling locations. The interpolation method: inverse distance weighting (IDW) was used to create spatial maps. The resultant mean noise values were subjected to parametric student T test as well as one way variance analysis, both respectively conducted at 95% probability level. For Oredo LGA, the month of June 2023, the mean noise values ranged from 45.5 dBA ± 0.07   to 88.6 dBA ± 0.07. For Egor LGA, the mean noise values ranged from 44.9 dBA ± 0.07 to 72.8 dBA ± 0.07. The student T test revealed that the observed difference between the mean noise values obtained in June and July at each LGA was insignificant change (p<0.05). The spatial maps generated for Oredo LGA revealed that the southern area of the LGA had elevated noise values as indicated by the coloration of the affected area. To reduce or the spread of environmental outdoor noise or lessen its impact on auditory health, it is suggested that buildings be made soundproof and planting of trees at strategic locations should be carried out.

Key Words:Auditory, Benin city, Egor LGA, Noise Pollution, Oredo LGA, Spatial