Impulse Assessment of the 3M PELTOR Sport RangeGuard Electronic Hearing Protector
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 on the RangeGuard Earmuff. Testing included two test modes for the RangeGuard: passive and active. Testing was completed in accordance with the ANSI standard S12.42-2010. All device 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 in both the passive and active test modes. The mean and standard deviation (SD) IPIL values were 20.6 (2.1) dB SPL at 150 dBP, 23.1 (1.8) dB SPL at 160 dBP, and 25.6 (1.0) dB SPL at 170 dBP in the passive mode, and 21.0 (2.4) dB SPL at 150 dBP, 24.1 (1.8) dB SPL at 160 dBP, and 25.3 (0.9) dB SPL at 170 dBP in the active mode. Results suggest that the RangeGuard Earmuff, when properly fit and functional, can adequately protect against impulses below 163.1 dBP in the passive test mode, and 164.1 dBP in the active test mode.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 09, 2022
- Accession Number
- AD1163230
Entities
People
- Alexa H. Kolias
- Derek W. Schwaller
- Jacob J. See
- Jeremy S. Federman
- Stephanie J. Karch
Organizations
- Naval Submarine Medical Research Laboratory