单词 | reverberation time |
释义 | reverberation time [ri´vǝr·bǝ`rā·shǝn ´tīm] ACOUSTICS The time in seconds required for the average sound-energy density at a given frequency to reduce to one-millionth of its initial steady-state value after the sound source has been stopped; this corresponds to a decrease of 60 decibels. |
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