Relations of the Human Vertex Potential to Acoustic Input: Loudness and Masking
作者:
Hallowell Davis,
Clyde Bowers,
Shirley K. Hirsh,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1968)
卷期:
Volume 43,
issue 3
页码: 431-438
ISSN:0001-4966
年代: 1968
DOI:10.1121/1.1910849
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The rate of increase of amplitude ofV(vertex) potentials with the SPL of tone bursts is very slow. In one experiment, the exponent of the power law was 0.15 at 250 Hz, 0.11 at 1000 Hz, and only 0.08 at 4000 Hz. Individual differences across subjects seemed more important than the interval between stimuli (1 sec vs 3.2 sec), and variability across trials often obscured the relation to intensity. In the presence of appropriate bands of masking noise, the input‐output curves rise abruptly from the masked threshold to approach the unmasked amplitude at a level about 30 dB above the corresponding masked threshold. The effect resembles recruitment of loudness. Tone pips and tone bursts of different frequency that were judged equally loud evoked slowVpotentials of approximately equal amplitude. In some subjects, however, bursts of white noise evoked significantly larger responses than equally loud tone bursts or pips. In spite of the partial similarities between them, the amplitude of theVpotential and the sensation of loudness are related differently to the parameters of the acoustic stimulus.
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