CORRELATION BETWEEN AMPLITUDE AND FREQUENCY FLUCTUATIONS OF SPONTANEOUS OTOACOUSTIC EMISSIONS

P VANDIJK*, HP WIT, A TUBIS, CL TALMADGE, GR LONG

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)

Abstract

The normalized cross-correlation function between the amplitude and frequency fluctuations of 11 spontaneous otoacoustic emissions was measured. A significant correlation was found in seven subjects. The correlation coefficient ranged from -0.37 to +0.65 across subjects. In four subjects, the amplitude fluctuation lagged the frequency fluctuation. The time lag was between 1.6 and 5.5 ms. The results were interpreted using a noise-perturbed limit-cycle oscillator with nonlinear (Duffing) stiffness as a model for a spontaneous emission. The data show that the relative increase of the nonlinear stiffness in this model was between -0.010 and +0.015. This indicates that an even-order nonlinear stiffness plays a minor role in the emission generator.

Original languageEnglish
Pages (from-to)163-169
Number of pages7
JournalJournal of the Acoustical Society of America
Volume96
Issue number1
Publication statusPublished - Jul-1994

Keywords

  • SYNCHRONIZATION
  • OSCILLATORS
  • MODEL
  • EARS

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