Below you will find various technical documents and tables relating to ProtectHear® personally moulded earplugs.

Download a visual of how the ProtectHear® vented ‘filter’ works. The filter enables you to hear the environment around you whilst still protecting from Noise Induced Hearing Loss (NIHL).

Download a PDF of the ProtectHear® operating instructions.

The table below shows the attenuation figures for both ProtectHear® vented and solid earplugs.

Description: ProtectHear, Solid 91-OP Custom Moulded
Frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Mean Attenuation (dB) 29.4 30.3 28.3 30.4 29.4 37.1 44.2 42.7
Standard Deviation (dB) 5.4 5.4 4.0 5.3 4.6 3.6 6.2 4.5
Assumed Protection (dB) 24.1 24.9 24.2 25.2 24.8 33.5 38.0 38.2
H=32; M=26; L=25 SNR=31
Description: ProtectHear, Vented 90-OP Custom Moulded
Frequency (Hz) 63 125 250 500 1000 2000 4000 8000
Mean Attenuation (dB) 24.3 25.6 25.4 26.7 27.2 35.4 40.8 38.4
Standard Deviation (dB) 5.5 4.8 2.5 4.1 2.9 2.6 4.6 5.1
Assumed Protection (dB) 18.8 20.7 23.0 22.6 24.3 32.7 36.2 33.2
H=31; M=25; L=24 SNR=29

CE Marked Personally Moulded Re-Usable Ear Protection To EN 352-2: 1993.
Tested by Salford University School of Acoustics. Report No. HP/01/26 & HP/01/27.

Certified By Inspec International ltd Certificate No. 965

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