11 European concert halls were surveyed in 19891). In this paper, comparisons are made between the room acoustical parameters measured and those obtained from computer simulations using the ODEON2), 3) program version 5.0 on these 11 concert halls. Four kinds of models each concert hall are produced in computer simulation. The one is computer simulation model with high geometrical fidelity and three kinds of models with simplifications to geometry are made by reducing the number of the surfaces and by controlling scattering coefficient of the surfaces. Various acoustic parameters in each model are calculated by using ODEON program to compare with those measured in each concert hall. The relative errors of each acoustical parameter between measurement data and simulated data are calculated. By comparing between relative errors for four kinds of models, the approximate abilities of computer simulations are examined.