一、前言现在,在编制广播节目过程中,附加人工混响已变得不可缺少,也使用着各式各样的装置。其中,混响室是最早的一种,由于它能得到自然的混响感,所以仍是各种混响器的中心。事实上,各种其他形式的附加混响装置,总是以混响室得到的混响音音质为目标进行改革和研制。但是对混响室反而没有人去努力作进一步改善。所以,直到今天,混响室还不具备它应有的可调混响时间的机能。这次,我们得到建造一个混响时间可变的混响室的机会,下面就叙述它的声学设计、可变混响装置的内容以及获得的声学 I. INTRODUCTION Nowadays, artificial reverberation has become indispensable in the preparation of radio programs, and a variety of devices have also been used. Among them, the reverberation chamber is one of the earliest, because it can get the natural reverberation, it is still the center of various reverberators. In fact, various other forms of additional reverberation devices have always been reformed and developed with the goal of reverberant sound quality obtained from reverberation rooms. But no one in the reverberation room to work hard to make further improvements. Therefore, until today, the reverberation room does not have its proper adjustable reverberation time function. This time we were given the opportunity to build a reverberation chamber with a variable reverberation time, the acoustic design of which is described below, the contents of the reverb unit and the acoustics