TITLE:
Analysis and Modeling of Noise in Urban Areas of Cities in Western Ivory Coast by Processing Acoustic Signal
AUTHORS:
Toa Bi Guié, Vangah Wognin, Anicet Kouakou, Bernard N’Zebaud, Sié Ouattara, Alain Clement
KEYWORDS:
Urban Noise, Acoustic Signal, Man, LAeq, MATLAB, Noise Pollution
JOURNAL NAME:
World Journal of Nano Science and Engineering,
Vol.16 No.4,
November
2,
2026
ABSTRACT: This thesis analyzes and models urban noise in five neighborhoods of the city of Man: Sari, Capen, Commerce, Dioulaboubou, and Domoraud. Acoustic recordings were made using a Samsung Galaxy A13 smartphone at three time slots (9 a.m., 12 p.m., and 5 p.m.) on three different types of days, then processed using MATLAB with a digital chain reproducing a Class 2 sound level meter. This chain made it possible to calculate acoustic (LAeq, L10, L50, L90, LNP, TNI), psychoacoustic (loudness), and spectral (spectral centroid, energy distribution by frequency bands) indicators, organized around three complementary models: temporal description, nuisance index, and spectral. The results reveal widespread acoustic saturation throughout the urban fabric. LAeq levels range from 66.95 dB(A) in Domoraud to 72.70 dB(A) in the Commerce district, exceeding the daytime threshold of 55 dB(A) recommended by the WHO and Ivorian decree no. 2016-791 by 12 to 18 dB(A). Spectral analysis confirms the predominance of motorized traffic as the main source, with mid-frequencies (200 - 2000 Hz) representing between 43.9% and 79.2% of the total acoustic energy. Each district exhibits a temporal profile consistent with its functional purpose. In light of this situation, the report recommends regulating audible warning devices, creating moderate traffic zones, and integrating acoustic requirements into urban planning documents.