Acoustic earmuffs also known as ear defenders are cups lined with sound-deadening acoustic foam which absorbs sound waves by increasing air resistance, thus reducing the amplitude of the waves. The energy is then transformed into heat.
Ear plugs are suitable for workplaces that have a maximum noise rating of 80dB. Ear plugs are manufactured from expanding foam which fit tightly in to the ear canal providing essential ear protection.
Ear defenders are vital in work environments that reach over 90dB. Ear damage can be prevented by wearing the correctly rated ear defenders. Ear defenders should always be worn whilst using loud equipment or range of any loud machinery.
The table below shows that it’s easy to exceed the maximum exposure levels. Even at sound levels below the level of likely damage, hearing protection will reduce fatigue from frequent exposure to sound.
|Recommended SNR Rating|
|85-90||20 Or Less|
|95-100||25 - 30|
|100-105||30 Or More|
|Maximum Unprotected Daily Exposure|