Plate 8 line graph showing variation in noise level Ijoka The average noise level thematic maps and chart are shown in plate 5 to plate 8 at the Ijoka residential area. Research reveals that the residential land use noise peak at 57.5-59.1 dB(A) in the morning, 54.8 to 56.8 dB(A) at afternoon and 52.3-64.1 dB(A) in the evening while the lowest noise value in the land use ranges between 40.2-42.4 dB(A), 39.4-41.2 dB(A), 38.2-40.0 dB(A) in the morning, afternoon and evening respectively. It is observed that areas close to the road side experience the highest noise level, this is as a result of traffic noise. The noise levels in this area are not as high as the educational and commercial area. Plate 9 to plate 11 shows the spatial distribution of noise levels in the selected areas within Oja Oba for morning, afternoon and evening respectively. The colors denote the increase in noise levels(decibel) which are represented from green to yellow on the thematic map. Plate 12 shows the line graph which denotes the noise peak and statistical analysis of the noise data .
3.3 Detailed Noise Levels in Oja Oba(Commercial)