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Related Experiment Video

Updated: Nov 21, 2025

A Low Cost Setup for Behavioral Audiometry in Rodents
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Auditory roughness elicits defense reactions.

Marine Taffou1, Clara Suied2, Isabelle Viaud-Delmon3

  • 1Institut de Recherche Biomédicale des Armées, 91220, Brétigny-sur-Orge, France. marine.taffou@def.gouv.fr.

Scientific Reports
|January 14, 2021
PubMed
Summary
This summary is machine-generated.

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Auditory contributions to postural and locomotor control: from basic research to clinical applications.

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Hearing natural animal sounds: Human emotional valence appraisal is strongly linked with auditory roughness perceptiona).

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Functional organization of distance-dependent audio-tactile integration is different in rear and front spaces.

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Using Android Smartphones to Collect Precise Measures of Reaction Times to Multisensory Stimuli.

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Auditory roughness, a sound quality, expands the protective body space (peripersonal space) more than simple sounds. This suggests roughness acts as an innate threat cue, triggering defensive responses.

Area of Science:

  • Neuroscience
  • Auditory Perception
  • Threat Detection

Background:

  • Auditory roughness is linked to aversion and threat processing in the brain.
  • Defensive behaviors are crucial for protecting the peripersonal space (PPS).
  • The role of auditory roughness in defensive behaviors and PPS monitoring is unclear.

Purpose of the Study:

  • To investigate the behavioral effects of auditory roughness on multisensory integration within the peripersonal space (PPS).
  • To determine if auditory roughness influences the detection of tactile stimuli based on spatial proximity.

Main Methods:

  • Healthy participants detected tactile stimuli on their hand while a virtual sound source loomed towards them.
  • Sounds used were either simple harmonic or rough, presented via binaural rendering.

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Last Updated: Nov 21, 2025

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  • Reaction times to tactile stimuli were measured under different auditory conditions.

    • Main Results:

    • Rough sounds significantly speeded tactile detection at greater distances compared to simple sounds.
    • This indicates that the peripersonal space (PPS), monitored via auditory-tactile integration, is sensitive to auditory roughness.
    • Auditory roughness enhances the behavioral relevance of auditory events in relation to the body.

    Conclusions:

    • Auditory roughness acts as an innate threat cue, even without emotional context.
    • Roughness expands the peripersonal space (PPS), suggesting a role in innate defensive responses.
    • This finding highlights the importance of auditory texture in threat detection and spatial awareness.