Impulse Assessment of the ComTac (trademark) III Hearing Defender Headset and the Howard Leight (trademark) MAX (registered trademark) Earplug
Abstract
This technical memorandum describes the IPIL testing conducted on a combined configuration that included the Howard Leight (trademark) MAX (registered trademark) and the ComTac III (trademark) Headset. Testing included two test modes for the ComTac III (trademark): passive and active. In all occluded conditions, the Howard Leight (trademark) MAX (registered trademark) was in situ. 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 test modes. The mean and standard deviation (SD) IPIL values at 160 dBP were 66.1 (2.8) dB SPL for the passive mode, and 67.2 (2.8) dB SPL for the active mode. Results at 170 dBP showed mean (SD) IPIL values of 70.6 (2.0) dB SPL for the passive mode, and 70.0 (1.5) dB SPL for the active mode. These results suggest that the ComTac III (trademark) Headset, when functioning properly and fitted in combination with the Howard Leight (trademark) MAX (registered trademark) earplugs can adequately protect against impulses below 180.0 dBP in both the passive and the active test modes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 18, 2022
- Accession Number
- AD1175309
Entities
People
- Alexa H. Kolias
- Derek W. Schwaller
- Jeremy S. Federman
- Natalie Silvia
- Stephanie J. Karch
Organizations
- Naval Submarine Medical Research Laboratory