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).
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 | ||||||||
