残響の明りょう度に及ぼす影響について
Effect of Reverberation on Speech Intelligibility

Shingo Watanabe, Kenji Inomoto
1979 Acoustical Science and Technology  
The detrimenta工 effect of reverberation on speech intelligibility is studied on the assumption that speech is series of discreat consonants and vowels . To propose speech 皿 Qdel , reletive level and average duration of Japanese vowe 工 s and con − sonants are discussed . After being made sure that amplitude probability distribu . tion of speech is similar to that calculated on the proposed model , hearing threshold of consonant was evaluated using simulated signal based on the above speech
more » ... above speech InodeL Several articulation tests with artificially reverberated sound were also carried out . These results show that the detri 皿 ental effect causes mainly against consonants , however vowel articulation scarcely decreases . Furthermore , calculated percent articulation exhibits good approximation to experimental results . As a condlusion discussed here, it is suggested that the detrimental effect of reverberation depends on both reverberation characteristic and syllable duration time or speech rate . For an example , tQ attain word articulation above 80% , the reverberation tirne should be shorter : than O. 75 s , where syllable duration time is 100
doi:10.20697/jasj.35.3_97 fatcat:7bvg655ruvfy5d3ubti42xixim