Masking Level Differences: Auditory Evoked Responses with Homophasic and Antiphasic Signal and Noise Two studies were devised to determine if objective quantification of the masking level difference is possible using the auditory evoked response (AER). In the first study, click stimuli were presented under three conditions: both the stimulus and masker in phase (SoNo); stimulus in phase, masker antiphasic (SoNπ); and stimulus antiphasic ... Research Article
Research Article  |   June 01, 1979
Masking Level Differences: Auditory Evoked Responses with Homophasic and Antiphasic Signal and Noise
 
Author Affiliations & Notes
  • A. Yonovitz
    The University of Texas, Houston
  • C. L. Thompson
    Massachusetts Institute of Technology, Cambridge
  • Joseph Lozar
    The University of Texas, Houston
Article Information
Research Articles
Research Article   |   June 01, 1979
Masking Level Differences: Auditory Evoked Responses with Homophasic and Antiphasic Signal and Noise
Journal of Speech, Language, and Hearing Research, June 1979, Vol. 22, 403-411. doi:10.1044/jshr.2202406
History: Received October 25, 1977 , Accepted March 9, 1978
 
Journal of Speech, Language, and Hearing Research, June 1979, Vol. 22, 403-411. doi:10.1044/jshr.2202406
History: Received October 25, 1977; Accepted March 9, 1978

Two studies were devised to determine if objective quantification of the masking level difference is possible using the auditory evoked response (AER). In the first study, click stimuli were presented under three conditions: both the stimulus and masker in phase (SoNo); stimulus in phase, masker antiphasic (SoNπ); and stimulus antiphasic with masker in phase (SπNo). In the second study 1000 Hz pure-tone stimuli were presented under SoNo and SπNo phasic conditions. AER’s were obtained at various intensity levels for each condition. The AER demonstrated differences in N1-P2 amplitudes evoked by the homophasic and antiphasic conditions for threshold and suprathreshold levels.

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