Journal of Rehabilitation Research & Development (JRRD)

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Characteristics of the audiometric 4,000 Hz notch (744,553 veterans) and the 3,000, 4,000, and 6,000 Hz notches (539,932 veterans)

Richard H. Wilson, PhD; Rachel McArdle, PhD

Figure 8. Bivariate illustration of notch depth (decibels) for right ear (ordi-nate) and left ear (abscissa) of 51,731 individuals with bilateral 4,000 Hz notches. For graphic clarity, (1) data points were jittered randomly using additive algorithm from –2.4 dB to 2.4 dB in 0.05 dB steps, and (2) only every 10th data point is shown. Linear regression reflects 51,731 notch pairs (R2 = 0.3)

This report is based on the audiogram database maintained at the Department of Veterans Affairs Denver Acquisition and Logistics Center. We evaluated audiograms from more than 1 million veterans, focusing on the dip in the audiogram (poorer hearing) that occurs in the high pitch range where hearing loss is often thought to first occur. The important findings were that more individuals had poorer hearing in one ear than in both ears. Slightly more people had these dips in the left ear than in the right ear.

Volume 50 Number 1, 2013
   Pages 111 — 132


View HTML  ¦  View PDF  ¦  Contents Vol. 50, No. 1
This article and any supplementary material should be cited as follows:
Wilson RH, McArdle R. Characteristics of the audiometric 4,000 Hz notch (744,553 veterans) and the 3,000, 4,000, and 6,000 Hz notches (539,932 veterans). J Rehabil Res Dev. 2013;50(1):111–32.
http://dx.doi.org/10.1682/JRRD.2011.11.0225
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Last Reviewed or Updated  Monday, March 11, 2013 1:53 PM

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