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Figure 7. Peak attenuation (NR values) obtained by the non-linear RACAL Gunfender earplug and the ISL earplug as a function of the peak pressure of the impulses (Friedlander waves)

Figure 7. Peak attenuation (NR values) obtained by the non-linear RACAL Gunfender earplug and the ISL earplug as a function of the peak pressure of the impulses (Friedlander waves)