Measurement on just noticeable difference of auditory perception with visual stimuli

Though the importance of visual-auditory interaction is increasing,the research on the auditory perception in the multisensory mode is not comprehensive enough.This paper addresses the JND(Just Noticeable Difference) change of auditory perception with synchronous visual stimuli.Through psychoacoustics experiments,loudness JND,subjective duration JND and pitch JND of pure tone were measured in auditory-only mode and visual-auditory mode with different visual stimuli which have different attributes such as color,illumination,quality and moving state.Statistical analyses of the experimental data indicate that,comparing with JND in auditory-only mode,the amount of JND with visual stimuli is often larger.The JND's average increment of subjective duration,pitch and loudness are severally 45.1%,14.8%and 12.3%.The conclusion is that the ability of JND-based auditory perception often decreases with visual stimuli.The incremental amount of JND is significantly effected by the attributes of visual stimuli.If the visual stimuli make subjects feel more comfortable,the JND of auditory perception will change smaller.