Coherence analysis of scalp responses to amplitude-modulated tones.

Journal Article (Journal Article)

Magnitude squared coherence is a method of auditory evoked potential (AEP) frequency-domain analysis, measuring the degree to which the AEP is determined by the stimulus as a function of frequency. In 10 normal-hearing human subjects, scalp responses to an amplitude-modulated (AM) tone (500 Hz carrier modulated with a 40 Hz envelope) were recorded. Critical value criteria were utilized in the statistical analysis of coherence-intensity functions for determination of threshold responses. When compared with subjective determination of AEP threshold from time-domain waveforms, coherence analysis provided a significantly (p less than 0.001) more sensitive threshold measure. Coherence analysis provides information on the spectral content of the response, and allows for the objective determination of threshold which may potentially be utilized in a more expeditious threshold measurement scheme.

Full Text

Duke Authors

Cited Authors

  • Tucci, DL; Wilson, MJ; Dobie, RA

Published Date

  • 1990

Published In

Volume / Issue

  • 109 / 3-4

Start / End Page

  • 195 - 201

PubMed ID

  • 2316342

International Standard Serial Number (ISSN)

  • 0001-6489

Digital Object Identifier (DOI)

  • 10.3109/00016489009107434


  • eng

Conference Location

  • England