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◉ Workplace Ambient Noise
Workplace environmental noise refers to the noise environment generated in production workshops and workplaces. Our country's occupational noise limit standard is 8 hours of equivalent continuous A sound level of 85dB.
Long-term exposure to high-noise environments without taking any effective protective measures will inevitably lead to permanent and irreversible hearing loss, and even serious occupational deafness. Occupational deafness has been listed as one of the important occupational diseases at home and abroad. In addition to causing deafness, strong noise can also have adverse effects on the human nervous system, cardiovascular system, digestive system, and reproductive function. Especially strong noise can also lead to neurological disorders, shock, and even life-threatening. Because noise easily causes psychological fear and shields alarm signals, it is often an important coordinating factor for industrial accidents.
◉ Workplace Noise Sources
Most of the noise at work comes from productive noise, which is also called industrial noise. It is widely found in various types of enterprises and is one of the most common occupational disease hazards. The industrial noise generated by various industries has different characteristics: the noise of the power plant is mainly generated by the hydrodynamic noise generated by the vibration, friction and collision of various equipment during the operation process; the environmental noise of the mining industry is mainly generated by the operation of various machines, Such as the noise generated by mining, drilling, scraping, crushing, etc.; the noise generated by the automobile manufacturing industry is mainly stamping, welding, fans and transportation equipment, as well as daily grinding, polishing, etc.; there are many noise sources in textile factories, among which weaving workshops The noise intensity is the highest; the main noise source in the machining industry is the mechanical noise generated by vibration, friction and collision.
◉ Characteristics of Industrial Noise
(1) High intensity: The sound pressure level of industrial noise is usually higher than 80 dB(A), or even as high as 110 dB(A), and long-term exposure can cause damage to human hearing and non-auditory systems;
(2) The proportion of high frequency sound is relatively large: high frequency is more common, and its harm is higher than that of medium and low frequency;
(3) Long continuous exposure time: During the production process, workers can be continuously exposed to strong noise for several hours every working day;
(4) Combined action of other harmful factors: The production process is often accompanied by harmful factors such as vibration, high temperature, and poisons that interact with it, causing harm to the human body;
If workers are exposed to high-decibel noise for a long time during their work, they can cause irreversible damage to the human auditory organs. The first cause is "noise-induced deafness".
◉ Related Standards
"Measurement of physical factors in the workplace - Part 8: Noise" GBZ/T 189.8-2007
"Acoustics - Determination of Occupational Noise Exposure Engineering Law" GB/T 21230-2014
"Industrial Enterprise Noise Measurement Specification" GBJ 122-1988
"Code for Design of Noise Control in Industrial Enterprises" GB/T 50087-2013
◉ Compliance Services
As a professional third-party testing and certification service organization, Jiayu Testing has qualifications such as CMA, CNAS, and occupational health technical service institutions. In the field of environmental testing, it currently has more than 1000 CMA testing parameters, covering water and wastewater, air and exhaust gas, soil and sediment, noise and vibration, and solid waste toxicity identification. The laboratory is built and managed strictly in accordance with standards, equipped with advanced instruments and equipment, and has a professional technical team with superb skills. It has rich industry service experience and strong testing technology capabilities. Based on the principles of objectivity and fairness, it provides authoritative testing reports with legal effect to the society, and provides full chain environmental risk management support for enterprises and regulatory departments. Welcome to contact us at 400-9269-886!
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