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LITERATURE UPDATE Table of Contents   
Year : 2006  |  Volume : 8  |  Issue : 30  |  Page : 61
Estimating noise-induced permanent threshold shift from audiometric shape: The ISO-1999 model

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How to cite this article:
Dobie R A. Estimating noise-induced permanent threshold shift from audiometric shape: The ISO-1999 model. Noise Health 2006;8:61

How to cite this URL:
Dobie R A. Estimating noise-induced permanent threshold shift from audiometric shape: The ISO-1999 model. Noise Health [serial online] 2006 [cited 2020 Nov 26];8:61. Available from: https://www.noiseandhealth.org/text.asp?2006/8/30/61/32478
OBJECTIVE: To describe the relation between audiometric shape and noise-induced permanent threshold shift averaged across the speech frequencies (N5123). DESIGN: Using an international standard (ISO-1999), 270 audiograms were created, representing both sexes and a variety of ages, exposure levels, and percentiles. Bulge depth (BD) was defined as the difference between pure-tone average for 2, 3, and 4 kHz and PTA for 1 and 6 kHz. RESULTS: N5123 was well-predicted by quadratic functions of BD, which accounted for 72 to 95% of the variance in N5123. CONCLUSIONS: Estimates of N5123, based on BD, can be helpful in medical-legal diagnosis and allocation of hearing loss.

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Correspondence Address:
R A Dobie
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Source of Support: None, Conflict of Interest: None


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