Correlation between DPOAE I/O functions and pure-tone thresholds.

Area of Science:

• Audiology
• Otoacoustic Emissions
• Hearing Science

Background:

• Distortion product otoacoustic emissions (DPOAE) measurements are used to estimate hearing thresholds.
• High variability and interference in DPOAE testing reduce sensitivity for accurate hearing threshold estimation.
• Previous studies have explored correlating audiometric thresholds with DPOAE, but results are inconsistent.

Purpose of the Study:

• To investigate the correlation between pure tone hearing thresholds and cochlear response thresholds using DPOAE Input/output (I/O) functions.
• To assess the influence of gender, history of acute otitis media, and ear side on this correlation.

Main Methods:

• Prospective study involving 69 individuals with normal hearing.
• Utilized multiple mixed regression models to analyze the relationship between pure tone thresholds and DPOAE measurements.
• Examined DPOAE Input/output functions for cochlear response thresholds.

Main Results:

• A statistically significant positive correlation was found between pure tone thresholds and DPOAE measurements across tested frequencies (2000, 3000, 4000, and 6000 Hz).
• Pure tone thresholds with 1 dB HL resolution and variables like gender, past otitis media, and ear side directly impacted the correlation.
• These factors also contributed to a reduction in response variability.

Conclusions:

• The study confirms a high correlation between pure tone thresholds and DPOAE measures when considering specific variables.
• Despite the correlation, response variability remains high, limiting the clinical utility of DPOAE I/O functions for precise hearing threshold estimation.
• Future research should incorporate these influencing variables when estimating hearing thresholds using DPOAE I/O functions.