Automobile noise will not only increase the fatigue of drivers and passengers, but also affect the driving safety of automobiles. On the other hand, noise also has a serious adverse effect on the digestive system and cardiovascular system, which will cause indigestion, loss of appetite, nausea and vomiting, thus leading to an increase in the incidence of stomach diseases and gastric ulcer diseases, and the incidence of hypertension, arteriosclerosis and coronary heart disease is significantly higher than normal. Noise can also have a bad effect on the visual organs.
Cars have brought modern material civilization to the world, but at the same time they have also brought social problems such as environmental noise pollution. As an important evaluation index of automobile ride comfort, automobile noise will also reflect the design level and technical level of manufacturers to a great extent. Therefore, controlling automobile noise to the lowest level is also the direction pursued by automobile designers.
There are generally four sources of automobile noise: engine noise, tire noise, noise in the air and noise caused by body structure. However, in the case of poor sound insulation, the noise inside the car can reach 90 decibels when driving at medium and high speeds, which will obviously reduce hearing, vision and physical strength, increase blood pressure, make the mood irritable and slow the brain. Noise not only affects driving mood, but also harms physical and mental health. It will also lay a great safety hazard for traffic accidents.