What are the standards for noise in the purification project of the clean room?

* 来源: * 作者: admin * 发表时间: 2021-05-21 16:21:00 * 浏览: 147

Clean room noise standards are generally stricter than health protection standards, the purpose is to ensure normal operation, meet the necessary communication and a safe and comfortable working environment. Therefore, the main indicators to measure the noise of the clean room are:

1. Annoying effect

Due to the noise, people feel uneasy and have annoyed emotions, which are generally divided into 7 levels of annoyance: very quiet, very quiet, relatively quiet, slightly noisy, relatively noisy and extremely noisy. Those whose response levels are very noisy and extremely noisy are considered as high annoyance, and the percentage of high annoyance people in the total population is high annoyance rate.

2. Impact on work efficiency

This mainly depends on the level of response in three aspects: concentration, accuracy of movement, and speed of work;

3. Interference with integrated communications

This is mainly divided into: clear or satisfactory, slightly difficult, difficult, impossible

The A sound level is used to evaluate the above three indicators. In the 1950s, it was proposed to use a spectrum curve as an evaluation standard, that is, the sound pressure level of the center frequency of each frequency band should not exceed the curve. Later, I learned that brushing the A level to measure the noise and noise level of voice interference and annoyance is more appropriate, and can replace the octave band sound pressure level as an indicator of the evaluation standard.

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