Hearing protection is required if the noise level at any point in the workday reaches

In general, the louder the noise, the smaller the exposure time before hearing protection is required. For most people, contact to a noise level of 90dB for an eight-hour workday is the determined allowable before hearing protection is required. When you’re exposed to work-related noise at or above 85 dB averaged over eight hours, employers are obligatory to start a hearing conservation program. Though, if the noise level at any point in the workday extents to 115 dB and lasts longer than 15 minutes, hearing protection will be required.

Once the reaction is done,the mass formed will be 100 grams