In the near future, small make up to live on the opposite of the community in the building, several large machines in the continuous operation, reinforced concrete board friction sound, let small make up a real headache. I believe, a lot of people have encountered similar situation, "I think quietly", but found that "quietly" seems to be very far away from us.
Since the industrial revolution in the 1860s, the development and use of various machinery and equipment have promoted the development and prosperity of human society, but also brought serious noise pollution problems. Noise is usually defined as noise at 80 decibels or more. When noise has a bad effect on people and the environment, it will form noise pollution. Noise will not only cause hearing damage, interfere with people's normal life, but also cause a variety of fatal diseases, serious threat to human health.
In order to prevent and control noise pollution and create a quiet acoustic environment, the ministry of environmental protection of the People's Republic of China issued and implemented standards for the quality of the acoustic environment, standards for the emission of environmental noise from industrial enterprises and factories, and standards for the emission of noise from social life in 2008. In the above three environmental noise measurement standards, all mentioned the environmental noise tester, it can be seen the importance of noise tester to the prevention and control of noise pollution.
Noise tester is used for noise detection and testing equipment in public places. The human ear is suitable for 60-70 decibels of sound, 80-90 decibels will feel very noisy, nerve cells will be damaged; A volume over 100 decibels is enough to kill or damage the hair cells inside the ear, causing hearing loss. The application of noise meter can provide the decibel level of noise so that relevant measures can be taken to control and reduce the noise and protect the hearing health.
At present, the market noise tester performance and variety difference. For environmental monitoring departments, instruments used for environmental noise monitoring should at least have the function of time average integration. However, for environmental monitoring stations, in order to carry out traffic noise measurement or noise census, there should also be statistical sound level measurement and 24-hour monitoring function. In addition, considering that there are many low-frequency components in the noise of social life, it is necessary to use the noise spectrum analysis and measurement instrument with octave or 1/3 octave filter.
With the boom of noise monitoring instrument market, a batch of well-known enterprises such as Qingdao juchuang, UK koseler, Denmark B&K and Beijing yangyingzhen have made great contributions to the prevention and control of noise pollution through sincere innovation and hard research and development of noise monitoring instruments.
However, the prevention and control of noise pollution is often not done by noise monitoring instruments alone. As early as 1996, China formulated and promulgated the law of the People's Republic of China on the prevention and control of environmental noise pollution. Therefore, it is necessary to specify specific noise pollution identification standards and compensation standards. In addition, people, enterprises, etc. should also consciously reduce the volume in life and work to jointly create a quiet sound environment.
We believe that with the deepening of noise pollution control work, the people's awareness of sound environment protection is increasingly strong, "quietly" will be closer and closer to us.