关键词: 汉语语言清晰度, 语言声压级, 混响时间, 留学生

Abstract: Two room impulse responses with different reverberation time were obtained by the acoustical simulation in a classroom． The subjective Chinese speech intelligibility was evaluated by foreign students under differentspeech sound pressure level conditions． The effect of speech sound pressure level on Chinese speech intelligibility scores for foreign students in classroom was discussed． The shorter reverberation time was，the higher Chinese speech intel-ligibility scores for foreign students were under the same speech sound pressure level condition． Chinese speech in-telligibility scores first increases with the increase of speech sound pressure level under the same reverberant time condition，but the speech intelligibility scores slightly decreased with the increase of the speech sound pressure level when the sound pressure level reaches a certain value． To ensure good Chinese speech intelligibility in classroom for foreign students，a speech sound pressure level of 62 ～74 dBA should be recommended with a lower reverberation time as far as possible．

Key words: Chinese speech intelligibility, sound pressure level, reverberation time, foreign student