Hearing Protectors
As you might know, there are essentially four types of hearing protectors:
- Molded earplugs
- Custom-molded earplugs
- Self-molded earplugs
- Ear muffs
Molded earplugs are typically made from plastic or silicone rubber and come in various shapes and sizes, often characterized by one or more ribs or contours. They are designed for multiple uses; therefore, they must be cleaned and properly stored after each use.
Custom molded plugs are generally made of plastic and are designed from a molded wax insert of the wearer's ears. They are considered multiple use but cannot be switched ear to ear.
Self-molded earplugs are generally made of mineral down or plastic foam and are molded or formed by the wearer. Generally one size fits all and they may be either single or multiple use.
Earmuffs are designed for multiple uses and can be worn with the harness over the head, behind the head, or under the chin. They are generally more comfortable, but may not provide as much protection as earplugs, since they sit over the ears rather than directly in the ear canal.
Knowledge Check Choose the best answer for the question.
7-8. Which of the following usually provides less noise reduction and protection?
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