Earplug Rankings Based on the Protector-Attenuation Rating (P-AR)

Forty-five attenuation spectra for earplugs were classified according to a simplified method designed to produce single-number ratings of noise reduction. The rating procedure was applied to the mean attenuation scores, to mean-minus-one-stardard-deviation scores, and to mean-minus-two-standard-deviations scores. The reporting of all three numbers seems to give the fairest indication of an earplug's value in controlling hearing damage in noise-exposed populations. The tests are described and ranked.

  • Record URL:
  • Supplemental Notes:
    • Supersedes Rept. no. FAA-AM-73-20, AD-779 552.
  • Corporate Authors:

    Federal Aviation Administration

    800 Independence Avenue, SW
    Washington, DC  United States  20591
  • Authors:
    • Tobias, J V
  • Publication Date: 1975-10

Media Info

  • Media Type: Digital/other
  • Pagination: 65 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00133378
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FAA-AM-75-11, FAAAM-B-74-PSY-51, FAAAM-B-75-PSY-55
  • Files: NTIS, NTL, USDOT
  • Created Date: Jul 13 2002 12:00AM