Sources of variability in distortion product otoacoustic emissions

Cassie A. Garner, Stephen T. Neely, Michael P. Gorga

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The goal of this study was to determine the extent to which the variability seen in distortion product otoacoustic emissions (DPOAEs), among ears with normal hearing, could be accounted for. Several factors were selected for investigation, including behavioral threshold, differences in middle-ear transmission characteristics either in the forward or the reverse direction, and differences in contributions from the distortion and reflection sources. These variables were assessed after optimizing stimulus parameters for individual ears at each frequency. A multiple-linear regression was performed to identify whether the selected variables, either individually or in combination, explained significant portions of variability in DPOAE responses. Behavioral threshold at the f2 frequency and behavioral threshold squared at that same frequency explained the largest amount of variability in DPOAE level, compared to the other variables. The combined model explained a small, but significant, amount of variance in DPOAE level at five frequencies. A large amount of residual variability remained, even at frequencies where the model accounted for significant amounts of variance.

Original languageEnglish (US)
Pages (from-to)1054-1067
Number of pages14
JournalJournal of the Acoustical Society of America
Issue number2
StatePublished - 2008

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


Dive into the research topics of 'Sources of variability in distortion product otoacoustic emissions'. Together they form a unique fingerprint.

Cite this