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Accession Number:

AD1157457

Title:

Impulse Assessment of the 3M(trademark) E-A-R(trademark) Skull Screws(trademark) Uncorded Earplug

Author(s):

• Kolias, Alexa H.
• See, Jacob J.
• Schwaller, Derek W.
• Karch, Stephanie J.
• Federman, Jeremy S.

Author Organization(s):

• NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT

Report Date:

2022-01-24

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 3M(trademark) E-A-R(trademark) Skull Screws(trademark) Uncorded Earplug (Skull Screws(trademark) Uncorded; Model: P1300). 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 muPa). 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 45.8 (1.8) dB SPL at 150 dBP, 47.4 (1.7) dB SPL at 160 dBP, and 48.2 (1.6) dB SPL at 170 dBP. These results suggest that, when properly fit and functional, the Skull Screws Uncorded will adequately protect (i.e., reduce exposure to less than 140 dBP) against impulses below 180.0 dBP.

Document Type:

Conference:

Journal:

Pages:

54

File Size:

3.82MB

Contracts:

Grants:

Descriptors:

Identifiers:

• impulse peak insertion loss
• hearing protection device
• passive HPD
• earplug
• passive earplug

SubjectCategory:

• Biotechnology

Communities of Interest:

• Biomedical

Distribution Statement:

Approved For Public Release

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