Reverberation time

特許 係属中 The time it takes for a signal to drop by 60dB is the reverberation time. RT60 is the time required for reflections of a direct sound to decay 60 dB. Reverberation time is frequently stated as a single value, if measured as a wide band signal (20 Hz to 20kHz), however, being frequency dependent, it can be more precisely described in terms of frequency bands (one octave, 1/3 octave, 1/6 octave, etc.). Being frequency dependent, the reverb time measured in narrow bands will differ depending on the frequency band being measured.