抄録
For measuring reverberation decay curve in a room using an impulsive sound source, the following two points, in digital signal processing, are examined. First, theerror caused during the FFT proces, is examined. The next step concerns, the different methods using FFT, the "frequency domain division method" and two "time domain division method", which are then compared. An attempt is made to clarify the problem arising in these two methods on signal processing. As a practical example, an investigation of the fast room acoustic analyzer, which had been developed by our corporation, is shown.
