Etki of çevresel gürültü açık endüstriler ve geçim kaynakları
İçinde genel, biz eğilim ile başvurmak için sesler o biz don't istemek duymak gibi gürültü, böyle gibi çevresel gürültü ve trafik gürültü. ses of bir piyano is a müzikal ses, ama o olur a rahatsız edici gürültü insanlar kim vardır çalışıyor veya uyuyor.
According to the different sources of sound, noise can be divided into mechanical noise, aerodynamic noise and electromagnetic noise. Mechanical noise is mainly due to solid vibration, in mechanical operation, due to mechanical impact, friction, alternating mechanical stress and operation due to uneven power and other reasons, so that the mechanical vibration of metal plates, gears, bearings and other vibration, so as to radiate mechanical noise, such as machine tools, looms, ball mills and other noise. When the gas and gas, gas and other objects (solid or liquid) to do high-speed relative motion, due to the viscous effect caused by the gas perturbation, aerodynamic noise, such as various types of fan intake and exhaust noise, jet aircraft boom, internal combustion engine exhaust, gas storage tank exhaust noise, explosion caused by rapid expansion of the surrounding air is also a kind of aerodynamic noise. Electromagnetic noise is due to magnetic field pulsation, magnetostriction caused by electromagnetic components vibration and noise, such as transformer noise.
Urban environmental noise occupies a very important position in noise research, which mainly comes from traffic noise, industrial noise, building construction noise and social life noise. Due to the increasing number of motor vehicles in the city and the large number of use of supersonic aircraft, the noise generated by transportation tools (such as cars, tractors, trains, airplanes, etc.) has become one of the main sources of urban environmental noise pollution. Industrial noise not only directly harms production workers, but also affects nearby residents. In industrial noise, the noise of textile mills in 90~106dB, machinery industry in 80~120Db large ball mills, large blowers in 130dB or more. Industrial noise is the main cause of noise deafness. Construction noise is caused by the use of various piling machines, mixers, cutters and other construction machinery at construction sites. Noise from social activities and family life is also prevalent, for example, the excessive use of tweeters for promotional activities produces annoying noise. The improper use of radios, tape recorders, and televisions in social life can also be a source of noise that interferes with neighbors in many cases. Household appliances such as fans, refrigerators, washing machines, etc., can also become sources of noise if they are not reasonably designed and manufactured, or if they are used inappropriately.
