PPE

How to choose the right earmuff according to the noise reduction value

Earmuffs are one of the important means to protect ear health. How to choose the noise reduction value of earmuffs is one of the best ways to choose suitable for your workplace. According to the applicable regulations and standards, ear protectors with enough noise reduction value should be selected according to the exposed noise value. The following will briefly explain the selection method of noise reduction value of earmuff:

for example:

1. The ambient noise detected at the ear is 92dba< The NRR is 21 dB 3. The noise level entering both ears is about 71 DBA after wearing hearing protection products correctly according to the instructions, the actual noise entering the human ear is about equal to the difference between A-weighted ambient noise value (DBA) and NRR value note: when the main frequency of ambient noise is below 500Hz, C-weighted ambient noise value should be used to estimate the noise reduction level of earmuffs. The NRR value calculated from the attenuation data measured in the laboratory, if you don’t wear it correctly, will reduce the protective performance of the product. Therefore, hearing protection products should always be worn correctly in noisy environment. Although hearing protection products can be recommended for the protection of impulse noise that is harmful to human body, because NRR is based on continuous noise reduction data, NRR can not accurately show the protection effect of ear protectors on impulse noise (such as gunshot) however, the wearer should choose the appropriate style and noise reduction level of earmuffs according to the requirements of the use environment. 1n order to better protect your hearing, the earmuff should be used in conjunction with other hearing protection measures, including professional assessment of noise level, training, hearing test and engineering control. Users who have received training and good protection awareness will get better protection. Mastering the correct wearing method is an important factor to ensure the noise reduction value. First, adjust the earmuff cup to the lowest position of the headband, gently pull the headband, cover the earmuff outside the auricle, try to remove the isolated hair between the earmuff and the head, adjust the height of the earmuff again, and adjust the angle of the earmuff properly, so that the earmuff can completely cover the auricle and get a comfortable feeling as far as possible, At the same time, make the headband close to the top of the head. The button type cushion and sound-absorbing foam of the earmuff can be replaced. 1t is recommended to replace them twice a year. 1n order to ensure good noise reduction effect, health and comfort copyright notice: This article is reproduced by 1nternet media, only representing the author’s point of view, and has nothing to do with China labor insurance network. 1f the information column articles and comments violate your legal rights, please call to let us know and we will deal with them in time

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