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Related Experiment Videos

Binaural summation after learning psychophysical functions for loudness

L E Marks1, E Galanter, J C Baird

  • 1John B. Pierce Laboratory, New Haven, CT 06519, USA.

Perception & Psychophysics
|November 1, 1995
PubMed
Summary

Learning specific loudness scales did not alter underlying perceptual loudness summation. Pretraining response functions for loudness perception does not change how the brain processes sound.

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Area of Science:

  • Psychoacoustics
  • Auditory Perception
  • Sensory Neuroscience

Background:

  • Magnitude scaling is used to study loudness perception.
  • Previous research suggests stimulus range can influence loudness perception.
  • The impact of response calibration on perceptual processes remains unclear.

Purpose of the Study:

  • To investigate whether learning specific loudness scales affects perceptual processes.
  • To determine if response-related training influences binaural summation rules.
  • To compare the effects of stimulus range manipulation versus response calibration on loudness perception.

Main Methods:

  • Trained participants to estimate loudness using prescribed power functions with varying exponents.
  • Collected magnitude estimates for binaural signals during training.

Related Experiment Videos

  • Assessed monaural and binaural loudness perception after training to evaluate binaural summation.

    • Main Results:

    • Participant responses during training approximated the learned power functions.
    • Post-training, participants applied learned scales uniformly to monaural and binaural signals.
    • Learned exponents did not alter the fundamental rules of binaural loudness summation.

    Conclusions:

    • Calibrating a loudness scale through response training does not affect underlying perceptual processes.
    • Stimulus range manipulation, unlike response calibration, likely influences perceptual events.
    • Binaural summation rules are robust and not easily altered by response-based training.