Summary:1) For workshops (employees): the hygienic standard for noise in industrial enterprises stipulates that employees shall be exposed to noise for 8 hour......
1) For workshops (employees): the hygienic standard for noise in industrial enterprises stipulates that employees shall be exposed to noise for 8 hours, and the noise value of workshops shall not exceed 85dB (a).
2) For the plant boundary (surrounding residents): according to the class II standard of the emission standard for noise at the boundary of industrial enterprises (gb12348-2008), the noise emission at the plant boundary in the daytime shall not exceed 55dB (a), and the noise value at night shall not exceed 45dB (a).
2、 Brief introduction of noise control measures in the factory
Noise can be comprehensively treated by means of sound insulation, noise elimination, sound absorption and vibration reduction.
1) Sound insulation: the factory is divided into equipment that can be enclosed independently. Sound insulation covers and silent rooms can be set for them to block the external radiation of noise;
2) Silencing: equipment with aerodynamic noise, such as fans and cooling towers, can be installed with silencing devices to control part of the noise.
3) Sound absorption: when the noise sources in the factory are numerous and scattered, and the noise sources cannot be isolated, sound absorbers can be installed on the ceiling and wall of the workshop to reduce the reverberation time of the workshop, so as to reduce the noise impact;
4) Vibration reduction: mechanical noise inside the factory can be controlled by vibration reduction and other devices.
These are some measures for noise control in the factory. The specific situation needs field investigation. Nanchang jialv environmental protection has rich experience in noise reduction, and the noise reduction effect can generally meet the expectations. In order to achieve a higher noise reduction effect, of course, the cost may be higher. The materials used must be more advanced to achieve better results, spend less money and do bigger things.