建築空間におけるインパルス応答を用いた音声伝送性能評価 : 各種物理評価指標の関係  [in Japanese] EVALUATION OF SPEECH TRANSMISSION PERFORMANCE WITH IMPULSE RESPONSE IN ROOMS : Relationships among objective measures  [in Japanese]

This paper presents collection of impulse response measured in various kinds of rooms and their evaluation of speech transmission performance. The purpose of this paper is to present following points; 1) To construct fundamental database of speech transmission performance for evaluation and design of sound environment for speech transmission. The database is consisted of 966 impulse responses. 2) To analyze collected data to provide range of objective measures such as reverberation time and speech transmission index, those are frequently used for evaluation of speech transmission performance in rooms. 3) To show the difference between with and without public address system by objective numbers for designing speech transmission performance in rooms with sound system. The main finding of this study is that reverberation time and other objective measures such as STI, C80, D50 and MTI are not correlated each other especially for cases with sound system. This suggests that these two groups of objective measures should be considered when designing and evaluating speech transmission performance in rooms.