Audio-Tactile Perception of Roughness
Résumé
Auditory roughness is a perceptual attribute at the basis of phenomena such as consonance and dissonance in music. The psychophysical correlates of this attribute are often studied by combining two monochromatic tones slightly separated in frequency, leading to more or less rapid beatings. Interestingly, roughness is not limited to the auditory modality and it is possible to evoke the same kind of sensation through the tactile modality by using a vibrotactile actuator. Whether or not audio and tactile modalities share the same perceptual roughness properties is still an open question that may reveal common sensory processes between the two modalities. Here we investigate this question in 2 pairwise comparison experiments unveiling roughness curves in audio and tactile modalities. The results reveal similar roughness curves in both modalities, which suggests a common way of processing and perceiving beatings.
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