Impulse Assessment of the Uncorded Moldex (registered) Pura Fit (registered) Earplug
Abstract
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 and the calculated mean IPIL values for the uncorded Moldex Pura-Fit (Pura-Fit Uncorded; Model: 6800). Testing was in accordance with the American National Standards Institute (ANSI) standard S12.42-2010. All samples were tested at the nominal levels of 160 and 170 decibel peak (dBP, re: 20 Pa). 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. The mean and standard deviation (SD) IPIL values were 54.4 (2.7) dB SPL at 160 dBP and 54.6 (2.2) dB SPL at 170 dBP (see Table 1). These results suggest that when properly fit and functional, the Pura-Fit Uncorded will adequately protect (i.e., reduce exposure to less than 140 dBP) for impulses below 180.0 dBP.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 16, 2021
- Accession Number
- AD1155306
Entities
People
- Alexa H. Kolias
- Derek W. Schwaller
- Jeremy S. Federman
- Natalie Silvia
- Stephanie J. Karch
Organizations
- Leidos
- Naval Submarine Medical Research Laboratory