The Analysis of Engine Noise and Noise Reduction Measures

Abstract

With the rapid development of automobile industry, the impact of engine noise on the social environment and human body can’t be ignored any longer. Noise pollution has become an important source of environmental pollution. This paper analyses the harm and classification of engine noise, putting forward noise reduction measures of the engine in view of the increasingly serious noise pollution. The noise reduction technology of engine plays an important role in the rapid development of automobile industry. Noise, from the perspective of environmental protection, refers to the sound that hinders people's normal study and work, as well as the sound that interferes with the sound that people want to hear, while it refers to the sound produced when the voice generator vibrates irregularly from the perspective of physics. The rapid development of automobile industry not only brings convenience to human life, but also brings a large number of social problems such as environmental noise pollution. Noise pollution is an important pollution that can’t be ignored in modern life. 1 The hazards of engine noise 1.1 The influence of engine noise on human physiology and psychology High decibel and long-term road traffic noise will damage people's hearing and lead to the abnormality of human circulatory system, which can cause heart disease, cerebrovascular disease, digestive system disease, nervous system disease and other diseases. At the same time, high decibel and long-term road traffic noise can easily lead to people's tension and bad mood, so as to seriously affect people's rest and sleep quality.[1] If things continue this way, people will feel fidgety and inattentive 1.2 The influence of engine noise on buildings Engine noise is harmful to buildings on a certain extent. When the natural frequency of bridges and buildings is consistent with the frequency of engine noise, resonance will be caused which will damage the structure of the building and reduce the seismic capacity that even causes collapse in serious cases.