Effect of multi-modal input to the perception of sound quality

The perception of sound quality of car interior noise is treated. The decisive factor of sound quality is car interior noise itself but our percetion varies also by the symultaneous exposure of seat and steenring wheel vibrations and the moving seanary from the window screen. We have conducted subjective experiments on the perception of car interior noise unsing car simulator located inside the sound proof room to see the effect of seat and steering wheel vibration and moving sceenary to our perception on sound quality such as pleasantness, booming sensation and powefulness. As the results, the addition of moving sceenary and seat-floor vibration together with the steering wheel viration have significant effect to our perception of sound quality.