Deviations from scaling symmetry in the apical half of the human cochlea

Carolina Abdala*, Sumitrajit Dhar, Radha Kalluri

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

6 Citations (Scopus)

Abstract

Invariant distortion product otoacoustic emission (DPOAE) phase elucidates scaling symmetry in the cochlea. Below some low-frequency boundary, DPOAE phase slope steepens. The origin of this break in phase invariance is not clear. Stimulus frequency (SF)OAE delays computed from the slope of phase also manifest discontinuities at low frequencies, though the relationship between the breaking of cochlear scaling as defined by SFOAE and DPOAE metrics has not been examined. In this study, OAEs were recorded in normal-hearing human adults to probe cochlear scaling and its breaking and to examine the correspondence between two OAE metrics of scaling. Results indicate: (1) the apical break in DPOAE phase invariance cannot be explained by contributions from the reflection-source component; (2) DPOAE phase signals a break from scaling near 1.5 kHz and (3) DPOAE and SFOAE metrics of cochlear scaling produce phase discontinuities within approximately one-quarter octave of each other and show comparable rates of breaking, suggesting a common underlying origin.

Original languageEnglish
Title of host publicationWhat fire is in mine ears: progress in auditory biomechanics
Subtitle of host publicationProceedings of the 11th International Mechanics of Hearing Workshop
EditorsChristopher A. Shera, Elizabeth S. Olson
Place of PublicationMelville, NY
PublisherAmerican Institute of Physics
Pages483-488
Number of pages6
ISBN (Print)9780735409750
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event11th International Mechanics of Hearing Workshop - What Fire is in Mine Ears: Progress in Auditory Biomechanics - Williamstown, MA, United States
Duration: 16 Jul 201122 Jul 2011

Publication series

NameAIP Conference Proceedings
PublisherAIP Publishing
Number1
Volume1403
ISSN (Electronic)0094-243X

Other

Other11th International Mechanics of Hearing Workshop - What Fire is in Mine Ears: Progress in Auditory Biomechanics
CountryUnited States
CityWilliamstown, MA
Period16/07/1122/07/11

Keywords

  • cochlea
  • OAE
  • otoacoustic emissions
  • scaling

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