These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Suggested standard hearing protector attenuation function relating to the NRR.
    Author: Cluff GL.
    Journal: Am Ind Hyg Assoc J; 1986 Dec; 47(12):776-8. PubMed ID: 3799478.
    Abstract:
    An assumption was made that a hearing protector (HP) attenuation function derived from some combination of the A-weights and C-weights used in the calculation of the NRR would produce a minimum difference between the NIOSH long R-value and the NRR-dBC + dBA + 3 (RNRR), regardless of the spectrum of the noise. Four hypothetical HP attenuation functions were derived. A mean R-RNRR difference, standard deviation and range were determined for these functions and for five real HP functions using 262 noise spectra. The mean R-RNRR difference for one of the hypothetical functions ("ED") was zero, with a standard deviation of .2 dB and a range of 1.6 dB. It was concluded that an HP designed to match the "ED" attenuation function would minimize the R-RNRR difference, regardless of the noise spectrum.
    [Abstract] [Full Text] [Related] [New Search]