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Related Experiment Videos

Two phase effects in roughness perception.

D Pressnitzer1, S McAdams

  • 1Institut de Recherche et de Coordination Acoustique/Musique (IRCAM), Paris, France.

The Journal of the Acoustical Society of America
|May 21, 1999
PubMed
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Sound roughness perception depends on both spectral and temporal factors. Phase manipulation influences roughness, indicating temporal asymmetry plays a role beyond modulation depth in auditory processing.

Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Signal processing

Background:

  • Roughness is a key auditory percept influenced by sound characteristics.
  • Previous research has focused on spectral content and modulation depth.
  • The interplay between spectral and temporal features in roughness perception requires further investigation.

Purpose of the Study:

  • To investigate the distinct contributions of spectral and temporal aspects of sound to roughness perception.
  • To examine the role of phase manipulation and waveform envelope shape in perceived roughness.
  • To elucidate the underlying mechanisms of auditory processing in roughness perception.

Main Methods:

  • Utilized three-component signals with controlled phase manipulations.

Related Experiment Videos

  • Varied the phase of the central spectral component to alter temporal characteristics.
  • Assessed perceived roughness across different amplitude spectra and modulation depths.

    • Main Results:

    • Perceived roughness was modified by phase manipulation, even when the waveform envelope was unaffected.
    • Waveform envelope shape, independent of amplitude spectrum and modulation depth, also influenced roughness perception.
    • These findings suggest that auditory processing involves an internal representation sensitive to temporal asymmetry.

    Conclusions:

    • Roughness perception is not solely determined by the modulation depth of an internal representation.
    • Temporal asymmetry, alongside spectral content, significantly impacts the perception of sound roughness.
    • Peripheral auditory processing plays a crucial role in encoding temporal features relevant to roughness.