Psycho-acoustical experiments on acoustical environment inside passenger-cars using 3-dimensional sound field simulation technique

摘要

In order to examine the acoustical condition inside cars, the authors have been performing aseries of psycho-acoustical experiments using a 6-channel recording/reproduction systemwhich have been devised to realize 3-dimensional sound field reproduction. As the test sounds,car interior noises during actual running were recorded at a passenger-seat by changing therunning conditions and were reproduced through the six loudspeakers which were orthogonallyarranged in a semi-anechoic room. The test subjects sitting at the center point of the reproducedsound field were asked to judge the aural impression (noisiness to the car interior noise and itseffect on listening to the radio). The experimental results were arranged using various noiseindicators.