Abstract
Reliability of high‐frequency thresholds was studied in normal‐hearing listeners ranging in age from 20–48 years. Using the PEST (Parameter Estimation by Sequential Testing) procedure, coupler‐referenced thresholds were measured in ten subjects at frequencies 1, 2, 4, 8, 10, 12, and 14 kHz using circumaural earphones. Ten replicates of the measurements were made in all subjects over several weeks. The results indicate a general tendency for standard deviations of thresholds to increase as a function of stimulus frequency in all subjects. Nevertheless, the standard deviations did not exceed 4.0 dB in any of the subjects, suggesting high‐frequency thresholds can be reliably obtained within subject, at least up to 14 kHz. Our findings are in disagreement with earlier results [E. A. G. Shaw, J. Acoust. Soc. Am. 46, 1502–1514 (1969)] which indicated that threshold variability is disproportionately high above 12 kHz in comparison with that below 12 kHz. [Work supported by the EENT Foundation of Louisiana.]
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