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Related Experiment Videos

Loudness recalibration as a function of level.

D Mapes-Riordan1, W A Yost

  • 1Parmly Hearing Institute, Loyola University Chicago, Illinois 60626, USA. dmapes@phi.luc.edu

The Journal of the Acoustical Society of America
|January 1, 2000
PubMed
Summary

Loudness recalibration occurs rapidly and is strongest when a moderately louder tone precedes a standard tone. Recalibration effects vary with standard tone frequency and level, with no recalibration at threshold.

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Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Psychophysics

Background:

  • Recent research explores contextual influences on loudness perception, including assimilation and recalibration.
  • Loudness recalibration, a phenomenon where perceived loudness shifts based on prior exposure, has been investigated using various methodologies.

Purpose of the Study:

  • To examine loudness recalibration using an adaptive tracking procedure.
  • To investigate the relationship between standard-tone level, recalibration-tone level, and the magnitude of loudness recalibration.
  • To replicate and compare findings with previous studies on loudness recalibration.

Main Methods:

  • An adaptive tracking procedure was employed to measure loudness recalibration across different standard- and recalibration-tone levels (80, 70, 60, 40 dB SPL, and threshold).
  • Two experiments were conducted: one using the adaptive tracking procedure and another replicating a previous study using the method of paired comparisons.
  • Standard tones were presented at frequencies of 500 Hz and 2500 Hz.

Main Results:

  • Loudness recalibration was substantial (up to 17 dB) in the 60-dB SPL condition using the tracking procedure, though less than previously reported with paired comparisons (22 dB).
  • Replication of a previous experiment yielded nearly identical results (21 dB).
  • Recalibration was maximal when the recalibration tone was moderately louder than the standard tone, minimal when levels were equal, and absent at threshold. Onset was rapid, and recalibration varied with standard tone frequency (11 dB at 500 Hz, 6 dB at 2500 Hz).

Conclusions:

  • Loudness recalibration is a robust phenomenon influenced by the relative levels and frequencies of auditory stimuli.
  • The adaptive tracking procedure provides a rapid and effective method for measuring loudness recalibration.
  • Findings suggest that loudness recalibration is frequency-dependent and sensitive to the precise stimulus conditions.

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