Affiliation:
1. Central Institute for the Deaf, Washington University, St. Louis, MO
2. Washington University School of Medicine, St. Louis, MO
Abstract
Purpose
This study examined the relation of audibility for frequency-specific sounds and the Speech Intelligibility Index (SII) to speech perception abilities of children with sensorineural hearing loss using digital signal-processing hearing aids with wide dynamic range compression.
Method
Twenty-six children age 5–15 years with pure-tone averages (0.5, 1.0, and 2.0 kHz) from 60-98 dB HL participated. Three subgroups were created based on the compression characteristics of each hearing aid. Minimum audibility was determined using aided thresholds for frequency-modulated tones and the SII calculated at 55 and 70 dB SPL using the simulated real-ear output of the hearing aid. The Lexical Neighborhood Test (LNT; K. I. Kirk, D. B. Pisoni, & M. J. Osberger, 1995) was presented at 50 and 70 dB SPL.
Results
LNT scores at 70 dB SPL were significantly higher than at 50 dB SPL. Average aided thresholds at 0.5, 1.0, and 2.0 kHz were negatively correlated with LNT scores at 50 dB SPL, and SIIs at 55 and 70 dB SPL were positively correlated with LNT scores at 50 and 70 dB SPL.
Conclusions
Results support using aided thresholds and speech test scores at soft to loud levels as part of the amplification fitting process.
Publisher
American Speech Language Hearing Association
Reference33 articles.
1. Pediatric amplification guidelines;American Academy of Audiology;Audiology Today,2004
2. Methods and Applications of the Audibility Index in Hearing Aid Selection and Fitting
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