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

The earmuffs are one of the important means to protect the health of the ear. How to choose the noise reduction value of the earmuffs is one of the best ways to choose suitable for use in your workplace. It should be in accordance with the applicable regulations and standards, according to the noise value exposed. Select ear protectors with sufficient noise reduction. The following will briefly explain how to choose the noise reduction value of earmuffs:

E.g:
1. The ambient noise detected at the ear is 92dBA.
2. The NRR is 21 dB.
3. The noise level into the ears is approximately 71dBA.

After the hearing protection product is correctly worn in accordance with the instructions, the noise value actually entering the human ear is approximately equal to the difference between the A-weighted environmental noise value (dBA) and the NRR value.

note:

When the main ambient noise frequency is below 500Hz, the C-weighted ambient noise value should be used for the estimation of the noise level of the earmuffs. The NRR calculated from the laboratory measured attenuation data will reduce the protective performance of the product if you do not wear it correctly. Therefore, hearing protection products should always be properly worn in a noisy environment. Although hearing protection products can be recommended for the protection of impulse noise that is harmful to the human body, NRR cannot accurately display ear protector-to-pulse noise (such as gunshots) because the NRR is based on noise reduction data from continuous noise. Protective effect.

However, the wearer should select the appropriate style and earmuffs with appropriate level of noise reduction according to the requirements of the use environment. In order to better protect your hearing, when using the earmuffs, other hearing protection measures should also be co-ordinated: including assessment of noise levels by professionals, training, listening tests, and engineering controls. Users who have been trained and have a good sense of protection will be able to get better protection. Mastering the correct wearing method is an important factor to ensure the noise reduction value. First adjust the earcup cup to the lowest position of the headband, gently pull the opening tape, and cover the earcup outside the ear, remove the earmuffs and the head as far as possible. Separate the hair between them and adjust the height of the earmuffs again. Adjust the angle of the earmuffs properly so that the earmuffs completely cover the pinna and try to achieve a sense of comfort while keeping the headband close to the top of the head. The snap-on cushions and sound-absorbing foams in the earmuffs can be replaced. It is recommended to change them twice a year. To ensure good noise reduction, hygiene and comfort.

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