In this work, the authors conducted a study of urban noise, using control measurements of noise levels on the example of the megacity of Almaty (Republic of Kazakhstan). Based on the experimental data obtained, a noise map was developed. The authors made measurements on four main streets at certain points and at certain times. Also measurements were made at intersections with traffic lights, taking into account the phases of signals (red or green). All the obtained data after processing were mapped using a color scheme. As a result, an experimental noise map of the Bostandyk district of Almaty was created. For the first time in Almaty, the noise map for selected neighborhoods of this district was made at different time intervals (9:00, 16:00, 19:00, 23:00) in accordance with the recommendations on monitoring and creation of noise maps. Sound pressure levels in relation to traffic signals at night and during peak hours were investigated. The results of the study confirmed that the noise levels during daytime exceed the regulatory limit. This work is devoted to the research and improvement of noise pollution mapping and monitoring system in urban environments.