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Impulse Assessment of the PELTOR(trademark) Optime(trademark) 105 H10A Earmuff
The impulse peak insertion loss (IPIL) is the standard measure of attenuation provided by hearing protection devices (HPDs) in response to an impulsive noise. This technical memorandum describes the IPIL testing conducted on the PELTOR(trademark) Optime(trademark) 105 H10A Earmuff (PELTOR(trademark) Optime(trademark) 105; Model: H10A). Testing was in accordance with the American National Standards Institute (ANSI) standard S12.42-2010. A total of five samples were fitted to an acoustic test fixture two times each for a total of 10 trials per test level. No samples of the HPD were rejected. All samples were tested at the nominal levels of 160 and 170 decibel peak (dBP, re: 20 Pa). As shown in Table 1, the results revealed an overall mean IPIL value of 32.1 dB SPL at 160 dBP and 37.2 dB SPL at the 170 dBP nominal level. These results suggest that when properly fit and functional, the PELTOR(trademark) Optime(trademark) 105 H10A Earmuff will adequately protect (i.e., reduce exposure to less than 140 dBP) for impulses below 177.2 dBP.
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