Disposable earplugs are typically made of foam material and are inserted into the ear canal. They absorb sound energy and prevent it from travelling through your ear canal to your ear drum. Not all the sound is absorbed, although the plug reduces the amount of sound energy reaching your eardrum and protects your hearing.
Individually moulded earplugs are made of hard acrylic or softer silicone. They can be made to absorb different levels of sound energy to suit.
Ear plugs are not recommended if wax, ear infection or any other medical condition relating to the ears is present.
Fitting Ear Plugs
Ear plugs should be the right size for each ear, therefore a different sized plug may be needed for each ear. Comfort and fit are crucial. The removal of ear muffs or plugs for even short periods of time can significantly increase your exposure to noise and therefore reduce their effectiveness.
To fit a soft foam plug:
Individually moulded ear plugs are easy to insert and remove as they are made to fit your ear canal and outer ear. They can be used for years if they are cared for properly.
Care and Cleaning oF Ear Plugs
ACKNOWLEDGMENT: "Attenuation of Hearing Protectors", 7th Edition, Australian Hearing Services (National Acoustics Laboratories), 126 Greville Street, Chatswood, NSW, 2067.
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