Abstract: This is a new proposal to evaluate sound fields systematically. Seven physical parameters are extracted from the echo time pattern at every measuring point and utilized as the fundamental data for the multidimensional analysis. In the same sound field, dissimilarity data between each measuring point are processed by the principal axis method using a dummy head-headphone system. According to the physical and psychological results, not only their inter-relations have been explained, but also the assignment of seat positions has become clear. It has also been made clear that more than 80 percent of the factor loading is obtained with, at most, three principal axes based upon both physical and psychological data.