残響の明りょう度に及ぼす影響について

概要

論文の詳細を見る
The detrimental effect of reverberation on speech intelligibility is studied on the assumption that speech is series of discreat consonants and vowels. To propose speech model, relative level and average duration of Japanese vowels and consonants are discussed. After being made sure that amplitude probability distribution 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 model. Several articulation tests with artificially reverberated sound were also carried out. These results show that the detrimental effect causes mainly against consonants, however vowel articulation scarcely decreases. Furthermore, calculated percent articulation exhibits good approximation to experimental results. As a conclusion 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, to attain word articulation above 80%, the reverberation time should be shorter than 0. 75s, where syllable duration time is 100ms.
社団法人日本音響学会の論文
1979-03-01