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Controlling audibility with noise for online experiments using sound.

Rodrigue Bravard1, Laurent Demany2, Daniel Pressnitzer1

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Online auditory experiments can now control sound perception across frequencies using threshold-equalizing noise. This method improves audibility consistency for diverse participants and equipment quality in remote hearing research.

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Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics
  • Human-Computer Interaction

Background:

  • Online auditory experiments lack standardized sound calibration.
  • Participant-owned equipment introduces variability in sound level and frequency response.
  • Controlling sensation level across frequencies is challenging in remote settings.

Purpose of the Study:

  • To propose and evaluate a method for controlling sensation level across frequencies in online auditory experiments.
  • To assess the effectiveness of threshold-equalizing noise in standardizing auditory perception.
  • To reduce variability in audibility measurements due to uncalibrated equipment or hearing loss.

Main Methods:

  • Embedding auditory stimuli within threshold-equalizing noise.
  • Testing the method on 100 online participants across a frequency range of 125 to 4000 Hz.
  • Comparing detection thresholds in quiet versus noise conditions.

Main Results:

  • Threshold-equalizing noise successfully equated detection thresholds across the tested frequencies (125–4000 Hz).
  • The noise equalization method was effective even for participants with atypical thresholds (due to equipment or hearing loss).
  • Audibility variability was significantly reduced when using noise equalization compared to quiet conditions.

Conclusions:

  • Threshold-equalizing noise offers a practical solution for calibrating sensation level in online auditory experiments.
  • This method enhances the reliability and comparability of remote hearing research.
  • The technique has potential applications in audiology, hearing aid fitting, and cognitive psychology studies.