The effect of sound on haptic perception

Research on the intermodality relationship of auditory and tactile perceptions was conducted An experiment is performed with 78(26 auditory cues X 3 tactile cues) stimuli combinations. The result of this experiment showed that the sound intensity level definitely affects perceived sensation in three ways: 1) The perceived roughness and ruggedness sensation is more innervated when the specific frequency is enhanced, e.g. approximately 30Hz similar to 300Hz for ruggedness and 30Hz-600Hz for roughness sensation; 2) Conversely, the perceived density is reciprocally affected by an intensity adjustment of the sound; 3) A frequency adjustment of the sound can elicit a perceived roughness if even no stimuli are conveyed to subjects. In general, the importance of congruency between modalities was observed.