How loud is the noise in the workshop？

Update:Dec 22,2021

Summary:There are three levels of noise1. Class I (30 ~ 59db)It's tolerable, but it's uncomfortable. When it reaches 40dB, it begins to disturb sleep.2. Class......

There are three levels of noise

1. Class I (30 ~ 59db)

It's tolerable, but it's uncomfortable. When it reaches 40dB, it begins to disturb sleep.

2. Class II (60 ~ 89dB)

The interference to the autonomic nervous system increases and the hearing is not clear. 85dB is the general requirement of hearing protection.

3. Class III (90 ~ 120dB)

It seriously damages the nervous system and causes irreversible damage to auditory organs.

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