Relation Between Loudness and the Amplitude of the Early Components of the Averaged Electroencephalic Response Acoustic clicks at 9.6/sec were presented monaurally at nine sensation levels (SL) from −10 to 70 dB to 24 normal-hearing young adults. Each subject participated in two experimental sessions in which judgments of loudness magnitude and averaged electroencephalic responses (AER) were obtained for each SL. For magnitude estimations, bursts of ... Research Article
Research Article  |   March 01, 1972
Relation Between Loudness and the Amplitude of the Early Components of the Averaged Electroencephalic Response
 
Author Affiliations & Notes
  • Jane R. Madell
    New York League for the Hard of Hearing, New York
  • Robert Goldstein
    University of Wisconsin, Madison, Wisconsin
Article Information
Research Articles
Research Article   |   March 01, 1972
Relation Between Loudness and the Amplitude of the Early Components of the Averaged Electroencephalic Response
Journal of Speech, Language, and Hearing Research, March 1972, Vol. 15, 134-141. doi:10.1044/jshr.1501.134
History: Received June 3, 1971
 
Journal of Speech, Language, and Hearing Research, March 1972, Vol. 15, 134-141. doi:10.1044/jshr.1501.134
History: Received June 3, 1971

Acoustic clicks at 9.6/sec were presented monaurally at nine sensation levels (SL) from −10 to 70 dB to 24 normal-hearing young adults. Each subject participated in two experimental sessions in which judgments of loudness magnitude and averaged electroencephalic responses (AER) were obtained for each SL. For magnitude estimations, bursts of about 10 clicks were presented at the standard level (30 dB SL) and at each of the other SLs. To obtain the AER at each SL, 1536 clicks were given.

Across subjects and trials the mean latencies of the peaks studied were, for 50 dB SL: Po, 11.3 msec; Na, 20.8 msec; Pa, 32.4 msec; and Nb, 46.5 msec; mean peak-to-peak amplitudes were Po — Na 0.56 µV, Na — Pa 0.88 µV, Pa — Nb 0.75 µV. AER latencie and amplitudes and loudness magnitude judgments were similar to those reported previously.

Slopes were derived for the three peak-to-peak amplitude curves and for the loudness curve on semi-log and log-log plots, but no significant correlations were found between the slopes of the loudness and AER functions for individuals or for the group. AER amplitude plotted against loudness estimates, however, yielded high correlation coefficients across subjects (Po — Na vs loudness 0.94, Na — Pa vs loudness 0.85, Pa — Nb vs loudness 0.75). The correlations for individuals were not significant.

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