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Revisiting relations between loudness and intensity discrimination.

W S Hellman1, R P Hellman

  • 1Department of Physics, Boston University, Massachusetts 02215, USA. hellman@buphyc.bu.edu

The Journal of the Acoustical Society of America
|June 2, 2001
PubMed
Summary
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Beat detection data reveals loudness variations, but these findings may not apply broadly. The study suggests previous conclusions about loudness dependence were too specific to Riesz

Area of Science:

  • Acoustics
  • Psychoacoustics
  • Auditory Perception

Background:

  • The relationship between loudness (L) and the just-noticeable difference in loudness (delta Ljnd) is crucial for understanding auditory perception.
  • Previous studies, notably by Allen and Neely (1997), suggested a significant level-dependent variation in this relationship.

Purpose of the Study:

  • To compare the loudness variation derived from Riesz's beat-detection data with findings from other auditory studies.
  • To evaluate the general applicability of Allen and Neely's conclusions regarding the dependence of delta Ljnd on L.

Main Methods:

  • Analysis of beat-detection data from Riesz (1928) at 1 kHz.
  • Comparison of these results with analogous relations from a range of auditory studies.
  • Examination of the slope variation relating log (delta Ljnd) to log (L).

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Main Results:

  • Beat-detection data uniquely exhibit the level-dependent slope variation described by Allen and Neely.
  • This slope variation, derived from beat detection, is independent of the specific shape of the loudness function.
  • The findings challenge the broad applicability of conclusions drawn solely from Riesz's methodology.

Conclusions:

  • Allen and Neely's conclusions on the dependence of delta Ljnd on L may be overly reliant on Riesz's specific beat-detection methodology.
  • The generalizability of these findings to other auditory perception contexts requires further investigation.
  • Beat-detection data provide a distinct perspective on loudness perception and its variations.