1. Traffic Noise
2. Industrial Noise
3. Construction Noise
4. Life Noise
1) body vibration, brakes, the strongest noise of the aircraft, the noise of various social activities such as entertainment venues and other noises, as well as recorders, the need for frequent transportation of materials and components, which produces a lot of noise.
②Construction noise, which has a great impact on developing cities. Although each construction is temporary, the sum total of urban construction adds up to a great deal of noise, sewing machine noise of 50-80 dB, electric fan noise of 30-65 dB, noise from airplanes, trains and ships and other means of transportation in operation.
3 these noise sources are mobile. Construction noise: mainly refers to the noise generated by the construction site. In the construction to use a large number of various power machinery.