That will depend on the degree of the noise hazard. Hearing protection devices do not all offer the same degree of protection. It must be adequate for the hazard the worker is exposed to-
People should wear a hearing protector if the noise or sound level at the workplace exceeds 85 decibels (A-weighted) or dBA. Hearing protectors reduce the noise exposure level and the risk of hearing loss. If hearing protection is required, then a complete hearing conservation program should be implemented.
104dB
Hearing and eye protection.
Much depends on the duration that the person is exposed to the sound. Under UK law an employer should provide hearing protection if the average sound level in the workplace exceeds 80db over the course of a day. Peak sound pressure levels should be no more than 135dB.
Shooting glasses and hearing protection are the most important.
No. A 9mm Luger is a very loud round compared to the .22 long rifle. Most people are comfortable firing a .22LR without hearing protection. Firing a 9mm without hearing protection would quickly cause short term hearing damage. But as a warning, you should always use hearing protection when firing any firearm.
Fall protection is a very important skill to know in the workplace. The following is a website that offers MSA fall protection training in such area: http://www.millerfallprotection.com/training
In some states, a license to carry a concealed weapon may be based on a business need (such as security company staff) or a personal protection need. It should be noted that states such as Maryland that make that distinction RARELY issue a personal protection license.
It can be ear plugs, earmuffs, there is many types of hearing protection and different ratings for each type. Check with the company first to see if a hearing conservation and observation test was preformed? What was the findings? Not every work place requires hearing protection. This information should be clearly posted on the companies information board. Check with the Safety Department too. If your employer provides hearing protection devices like ear plugs or ear muffs, make sure you know how to use them correctly, and be sure to wear them for then entire time you are in the loud noise environments. Taking them off for even a short time while in high noise areas may result in much more noise exposure than you need or want to have. As a rough rule of thumb, if you stand at a normal conversational distance from someone but need to shout to be heard, the noise in the area is loud enough that you may need hearing protection if you are in that environment most of the work day.
It depends on the application. What are you trying to do?
To protect your hearing from damage caused by loud noise, you should wear ear protection such as earplugs or earmuffs, limit exposure to loud noises, and maintain a safe distance from sources of loud noise. Regular hearing check-ups are also important to monitor any changes in your hearing.
The welder should wear hearing protection such as earplugs or earmuffs that are designed to reduce noise levels. It is important to choose the appropriate level of protection based on the noise levels present in the work environment. Additionally, using a combination of earplugs and earmuffs can provide extra protection.