Main noise indicators in industrial clean room
The noise standards of industrial clean room are generally stricter than the standards for protecting health, the purpose is to ensure the normal operation of the operation, to meet the necessary conversations and a safe and comfortable working environment. Therefore, the main indicators for measuring the noise of industrial clean room are:
1. Annoying effect
Due to the noise, people feel uneasy and have annoying emotions. They are generally divided into 7 levels: extremely quiet, very quiet, quieter, and slightly noisy, relatively noisy and extremely noisy. Where the response level is very noisy and extremely noisy, it is high annoyance, and the percentage of high annoyance in the total number is the high annoyance rate.
2. Impact on work efficiency
This mainly depends on the response level of three aspects. These three aspects are: concentration, accuracy of movement, and speed of work;
3. Interference to integrated communications
This is mainly divided into: clear or satisfactory, slightly difficult, difficult, impossible
The above three indicators are evaluated with A sound level. In the 1950s, it was proposed to use a spectrum curve as the evaluation standard, that is, the sound pressure level of the center frequency of each frequency band must not exceed this curve. Later, I learned that brushing the A level to measure noise and the level of voice interference and noise is more appropriate, and can replace the octave sound pressure level as an indicator of the evaluation standard.
According to the measurement data conducted by the Institute of Building Physics of the Chinese Academy of Building Sciences in 1981 for the preparation of the "Code for Design of Clean Workshops", when it is below 65dB(A), only 30% of people feel high annoyance. At 65-70dB(A), its impact on the three aspects of work efficiency showed a low level; under 60dB(A), it was clear and satisfactory. There are certain difficulties at 60～75dB(A), dogs at 75dB are very difficult. Therefore, it is considered that the noise level of the industrial clean room should be 65d). At this time, the high annoyance rate can be less than 30%; the general call is guaranteed; the effect on the work efficiency is very small.
The above are the three indicators summarized by Cheng Yi, I hope it will be of benefit to you. Wuxi Chengyi Purification Equipment Co., Ltd. specializes in air purification engineering, purification workshop, dust-free workshop, clean engineering, clean room and other project design, production, installation, commissioning and air-conditioning purification equipment products, has been produced for nearly ten years history.