At a distance of 50m from an aircraft engine, the sound of starting the engine is about 140 decibels, one-sixth higher than thunder. For example, the take-off noise of the Concorde is 119.5 decibels, the lateral noise is 112.2 decibels, and the entry noise is 116.7 decibels. With the continuous development of production technology, the noise of aircraft has gradually decreased. The Airbus A380 has been identified as the quietest long-range aircraft by authorities, and its noise is half that of the Boeing 747.
Airport aircraft noise is a problem of noise pollution on the surface, but in essence it is the contradiction and conflict between urban planning and construction and the protection of public environmental rights and interests. At present, there is no special regulation for aircraft noise. The Environmental Noise Standards for Urban Areas of the People's Republic of China stipulates that the noise standard values of residential areas, cultural and educational institutions and rural residential environments are 55 decibels during the day and 45 decibels at night; the equivalent noise value of commercial and industrial mixed areas is 60 dbels and 50 decibels at night; in cities On both sides of the traffic trunk line, the equivalent noise value of daytime noise is 70 decibels, and at night
No more than 55 decibels.
Noise is very harmful to people:
1. At 80~85 decibels, it is manifested as headache and poor sleep;
2. At 90~100 decibels, emotional and tired;
3. At 100~120 decibels, dizziness, insomnia and memory are obvious.
Decline:
4. At 120~140 decibels, earache causes phobia. Noise
It can lead to tachycardia, arrhythmia, myocardial damage, blood pressure
Elevated, leading to arteriosclerosis, coronary heart disease, etc.; affecting gastrointestinal and digestive system disorders, increasing the incidence of gastric ulcer and duodenal ulcer.
