What question did this study set out to answer?

This study aims to evaluate the correlation and agreement among different cochlear tuning methods to determine their interchangeability.

Limited Interchangeability of Cochlear Tuning Estimates Across Fast Psychophysical Tuning Curve, Distortion-Product Otoacoustic-Emission Level-Ratio Function, and Stimulus-Frequency Otoacoustic Emission-Phase Methods at 2 to 8 kHz

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Secondary analysis evaluates the interchangeability of cochlear tuning estimates in individuals, highlighting method discrepancies.

This study aims to evaluate the correlation and agreement among different cochlear tuning methods to determine their interchangeability.
Analyzed data from 67 adults with varying hearing profiles.
Quantified frequency selectivity at 2, 4, and 8 kHz using fPTCs, distortion product OAE, and SFOAE methods.
Utilized Pearson correlations, intraclass correlation coefficients, and Bland–Altman limits of agreement for comparisons.
Weak and inconsistent intermethod associations were observed across frequencies.
Intraclass correlation coefficients were near or below zero, indicating poor absolute agreement.
Bland–Altman analysis showed substantial individual-level disagreement among methods.

Wu et al. (2026) studied this question.

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