Abstract
A lot of objective physical parameters for acoustic evaluation of a concert hall have been proposed. However, no one can believe that they provide a perfect method for designing a concert hall. There is a problem with the measuring method of physical parameters, i.e., almost all acoustical measurements in a hall use an omni-directional loudspeaker, which is not similar to most musical instruments. Also, no parameter specifies tone-color or sonority of music performance. These are important factors in evaluating concert hall acoustics. The remaining problems must be considered as follows: (1) The position of sources on a stage changes tone-color and generating sound power. (2) The directivity of sources gives different effects on room acoustics at the same position on the same stage. (3) Each musical instrument has its own important frequency range. What instrument shall be selected properly and what execution of the instrument shall be adopted for evaluation? (4) What is a suitable program of music for evaluation of hall acoustics? Some examples of the problems upon sources and its performance with using real musical instruments, and the remaining problems for evaluations of the concert hall will be presented.
Published Version
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