How many db car horn sound db standard car horn

by:DEFUS     2020-06-17
How many db car horn sound db standard car horn. Car horns is the main source of traffic noise pollution has a voice suddenly, short duration, the characteristics of the volume. The sound of the car horn will lead to the instantaneous value of more than 70 dB noise and close to 80 dB, the car's whistle will be more than 80 dB. Noise is very harmful to people, especially the sudden noise. Car horn how many decibels of the development of the our country the law of the People's Republic of China on the prevention and control of environmental noise pollution in the above provisions of the state of environmental noise emission standards, and interfere with other people's normal life, work and study the phenomenon known as environmental noise pollution. Voice of the decibel is a unit of sound pressure level, for the dB, is used to represent the size of the sound. The law of the People's Republic of China urban area noise standards are defined in the city of 5 kinds of regional environmental noise maximum limit: convalescence area, senior villas, senior hotel area, 50 db day, 40 db at night; Give priority to in order to living, culture and education authority area, day 55 db, 45 db at night; Residential, commercial, industrial, hybrid area, day 60 db, 50 db at night; 65 db industrial zone, day, night 55 db. City's road traffic trunk road, inland waterway, iron was the main mainline area, time, day 55 db, 70 db, night 22 points to in the morning at 6 o 'clock at night. When driving the vehicle should comply with the provisions of this standard. Car horn sound db standard of the development of the our country the law of the People's Republic of China on the prevention and control of environmental noise pollution in the above provisions of the state of environmental noise emission standards, and interfere with other people's normal life, work and study the phenomenon known as environmental noise pollution. Voice of the decibel is a unit of sound pressure level, for the dB. Used to represent the size of the sound. The law of the People's Republic of China urban area noise standards are defined in the city of 5 kinds of regional environmental noise maximum limit: convalescence area, senior villas, senior hotel area, 50 db day, 40 db at night; Give priority to in order to living, culture and education authority area, day 55 db, 45 db at night; Residential, commercial, industrial, hybrid area, day 60 db, 50 db at night; 65 db industrial zone, day, night 55 db. City's road traffic trunk road, inland waterway, iron was the main mainline area, time, day 55 db, 70 db, night, Refers to the 22 points at night to the next morning at 6 o 'clock) 。 According to the regulations of the national standard, the noise of the residential area, should not exceed 50 decibels during the day, night should be below 45 decibels, if more than this standard, will cause harm to human body. So, how much is the noise of the indoor environment standards? Country 'urban regional environmental noise measurement method' in paragraph 4, the interior noise measurements, the indoor noise limit is lower than the standard values of the area 10 db. Strong noise can cause ear discomfort, such as tinnitus, earache, hearing impairment. According to the determination, more than 115 decibels of noise will cause deafness. If, according to clinical medicine in 80 decibels noise environment life, cause the deaf could reach 50%. Medical experts studies suggest that family noise is one of the causes of deaf children. Lower the work efficiency. The study found that more than 85 db noise, can make a person feel very upset, people will feel the noisy, so I can't concentrate on work, the results will lead to lower efficiency. Cardiovascular damage. Noise is a risk factor for cardiovascular disease, the noise will accelerate cardiac aging, increase the incidence of myocardial infarction. Medical experts the human and animal experiments proved that long-term exposure to noise can increase the adrenal glands in the body, so that the blood pressure to rise, people living in the long-term average of 70 db noise, can make its myocardial infarction incidence increased by 30% or so, especially the night noise can make the incidence of a disease is higher. The survey found that people living near the highway, myocardial infarction rate increased by 30% or so. Survey 1101 textile factory, the incidence of hypertension for 7. 2%, among which the contact strength of 100 db noise, the incidence of hypertension for 15. 2%. Noise can also cause such as nervous system disorders, mental disorders, endocrine disorders, and even higher accident rate. High noise environment, can make the person dizziness, headache, insomnia, much dream, fatigue, memory loss, and fear, irritability, inferiority, and even insanity. In Japan, there have been because can't stand the stimulation of the train noise and confusion, and finally the example of suicide. Interference to rest and sleep. Rest and sleep is dispel fatigue and restore physical strength and the necessary condition to maintain health. However, noise makes no peace to rest and sleep. When people and can't sleep, will be tight, shortness of breath, pulse, brain, will feel tired the next day, or go limp. Thus affect the work and learning, over time, will have to neurasthenia, for insomnia, tinnitus, fatigue performance.
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