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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