From the occupational standpoint, the following standards apply.
The OSHA standard for occupational noise allows for up to 90dBA for an 8 hour time period without hearing protection.
Employers are required to offer hearing protection at 85dBA. Professionally I advise employers to make protection mandatory at 85dBA.
A good rule of thumb is when you have trouble hearing a person talking to you at a normal conversational voice, you have exceeded the 85dBA.
The OSHA standard for occupational noise allows for up to 90dBA for an 8 hour time period without hearing protection.
Employers are required to offer hearing protection at 85dBA. Professionally I advise employers to make protection mandatory at 85dBA.
A good rule of thumb is when you have trouble hearing a person talking to you at a normal conversational voice, you have exceeded the 85dBA.