Evaluation and analysis of noise levels in Ilorin metropolis, Nigeria

Abstract

Evaluation and analysis of noise pollution levels have been carried out to determine the level of noise and its sources in Ilorin metropolis. Noise measurements have been done in the morning, at noon, in the evening, and at night to determine noise pollution all over the city. The selected areas of study are commercial centers, road junctions/busy roads, passenger loading parks, and high-density and low-density residential areas. The road junctions had the highest noise pollution levels, followed by commercial centers. The results of this study show that the noise levels in Ilorin metropolis exceeded allowed values at 30 of 42 measurements points. There is a significant difference (P<0.05) in the noise pollution levels and traffic noise index in all the locations. From the measured noise values, a map of noise pollution was developed for Ilorin. Many solutions proposed for noise abatement in the city are set out.

Comparison of Road Traffic Noise at Residential Areas in Klang Valley, Selangor and Nibong Tebal, Penang

“…This is very dangerous to the health of the people in these areas. According to World Health Organization, noise level of 60 dB(A) can result in temporary hearing impairment and 100 dB(A) can cause permanent impairment [11] for a certain period of exposure time.…”

“…The noise pollution was lowest compared to Klang Valley during daytime and night time because majority of the residents are away from their home in the afternoon. Some are in their offices, markets, or shops while children were in their schools by this time of the day [11]. Therefore, no trip generated by the residents during afternoon.…”

Environmental and Health Impact of Cement Factory Production in Ibese, Ogun state, Nigeria

“…Noise levels at Parking Plant-recycling Unit, Parking Plant-Roto Parker Unit, Cement mill, and Raw-mill all exceeded the standard. Oyedepo and Saadu [54] reported that only 17% of the measurements in the parking, clay crusher and red soil silo had acceptable noise levels below 80 dB, while 83% of measurements for those sections had noise levels between 80-90 dB. About 50% of measurements at the limestone crusher had noise levels between 80-90 dB, with 50% were above 90dB.…”

Assessment of Traffic Noise on Highway Passing from Urban Agglomeration

“…Noise survey in various R. Vijay et al cities throughout the world has revealed that traffic noise is the largest contributor to recorded sound levels and the most important source of annoyance [3][4][5][6][7]. Traffic is a significant part of urban environment contributing to about 55% of total urban noise [8,9].…”