Impulse Assessment of the Howard Leight (Trademark) Fusion (Registered) Multiple-Use 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 Howard Leight Fusion Multiple-Use Earplug (Fusion; Model: FUS30-HP). Testing included two test modes: uncorded (i.e., fabric cord detached) and corded (i.e., fabric cord attached). Testing was completed in accordance with the ANSI standard S12.42-2010. All device samples were tested at the nominal levels of 150, 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 uncorded and corded modes. The mean and standard deviation (SD) IPIL values for each mode were within 0.3 dB at 150 dBP, 0.4 dB at 160 dBP, and 0.1 dB at 170 dBP. These results suggest that, when properly fit and functional, the Fusion can adequately protect (i.e., reduce exposure to less than 140 dBP) against impulses below 180.0 dBP in both the uncorded and corded modes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 18, 2022
- Accession Number
- AD1160510
Entities
People
- Alexa H. Kolias
- Derek W. Schwaller
- Jacob J. See
- Jeremy S. Federman
- Stephanie J. Karch
Organizations
- Naval Submarine Medical Research Laboratory