Accession Number:

AD0639686

Title:

THE EFFECT OF FREQUENCY SPECTRUM ON TEMPORAL INTEGRATION OF ENERGY IN THE EAR,

Descriptive Note:

Corporate Author:

JOHNS HOPKINS UNIV BALTIMORE MD PSYCHOLOGICAL LAB

Personal Author(s):

Report Date:

1947-07-16

Pagination or Media Count:

8.0

Abstract:

The experiments are designed to test the following hypothesis. The rate of the temporal integration of energy in the ear at threshold is dependent on the width of the frequency band of the energy to be integrated. Duration is exactly equivalent to intensity only when all the energy to be integrated is in a narrow band of frequencies. The hypothesis is tested by taking advantage of the spectral distribution of energy in short tones. As a tone becomes very short, the effective band width of the energy increases. The band width of energy is essentially defined by the reciprocal of the duration of the tone. Thus as the duration of a tone decreases, not only does the total energy in that tone decrease, but the band width of energy also increases. The intensity threshold, then has to be increased as duration is decreased to compensate for both effects if the hypothesis is correct. The results are in line with the predictions of the hypothesis. The width of the band necessary for maximum integration is also related to frequency and the width of critical bands. Author

Subject Categories:

  • Anatomy and Physiology
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE