多目的ホールの電気音響システム設計に関する一考察

抄録

Some experimental results on the sound reinforcement system design for multipurpose halls are presented, as musical entertainments fully using the electroacoustic equipments are increasing currently. The experiments have been made through the sound reinforcement system designs for the World Popular Song Festival annually held at the Nippon Budokan Hall. For the purpose of optimum loudspeaker system design, comparison between the distributed and the concentrated layouts of loudspeakers is made. Following informations concerned with the reinforced sound field are obtained. (1)Average SPL of reinforced sound is 91 to 92dB. (2)Average spectrum of reinforced sound is measured and dynamic range is approximately 40dB. (3)The peak factor of RMS output voltage of power amplifier ranges from 20 to 25dB, and the total power output corresponding to the peak value required is estimated to be approximately 10kW in the hall concerned. These feature the reinforced sound of latest popular music and will provide the necessary information on the sound reinforcement system design hereafter.