Nonauditory Factors on Distortion Product Otoacoustic Emissions

Distortion product otoacoustic emissions(DPOAEs have emerged as a promising clinical tool for measuring hearing status. This investigation examined the influence of four variable(test/retest reliability, test environment, gender and number of measurement points of resolution/octave on the DPOAE response when obtained using a commercially available system, Otodynamics ILO92. Twenty normal hearing adults(10 males and 10 females served as participants in this study. DPOAE measurements were obtained over three test sessions(baseline, 1 week retest, and a 10 minute retest following the one week measurement. Results showed that：1 correlations were high across the three test sessions；2 test environment considerably affected the DPOAE measures below 4kHz；3 DPOAE amplitudes were significantly greater in females than males at 3 and 6kHz；and 4 DPOAE amplitudes were not affected significantly by the number of resolution points employed. (