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Relationships Among Loudness Indexes in Cochlear-Implant Patients
Francis K. Kuk, PhD;
Richard S. Tyler, PhD;
Bruce J. Gantz, MD;
Michael Bertschy
Arch Otolaryngol Head Neck Surg. 1990;116(11):1320-1324.
Abstract
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• The purpose of the experiment was to determine if the most-confortable-listening (MCL) levels and loudness-discomfort levels (LDLs) can be predicted from threshold measurements obtained from patients with cochlear implants using direct electrical stimulation. Psychophysical measurements of thresholds, MCLs, and LDLs with 125-Hz and 2000-Hz sinusoids were obtained from 16 patients with cochlear-implants 1 month after the connection of their Ineraid processor (an auditory prosthesis). In general, the correlation coefficients among the loudness indexes obtained with a 125-Hz stimulus were similar to those for a 2000-Hz stimulus. Correlations between thresholds and MCLs were moderate, whereas correlations for thresholds and LDLs were fair. Correlations between MCLs and LDLs were high. This suggests that LDLs cannot be predicted from thresholds. On the other hand, these preliminary data suggest that MCLs may be reliably predicted from thresholds or LDLs to set the gain on a cochlear-implant processor.
(Arch Otolaryngol Head Neck Surg. 1990;116:1320-1324)
Author Affiliations
From the Department of Otolaryngology (Drs Kuk, Tyler, and Gantz and Mr Bertschy) and Speech Pathology and Audiology (Dr Tyler), University of Iowa Hospitals and Clinics, Iowa City. Dr Kuk is now with the Department of Otolaryngology—Head and Neck Surgery, University of Illinois, Chicago.
Footnotes
Accepted for publication June 2, 1990.
Reprint requests to Department of Otolaryngology—Head and Neck Surgery, University of Illinois, Chicago, IL 60612 (Dr Kuk).
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