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.
|Original language||English (US)|
|Number of pages||6|
|Journal||Ear and hearing|
|State||Published - Dec 1 2005|
ASJC Scopus subject areas
- Speech and Hearing