A study on the optimal English speech level for Chinese listeners in classrooms
Speech intelligibility in classrooms affects the learning efficiency of students directly, especially for the students who are using a second language. The speech intelligibility value is determined by many factors such as speech level, signal to noise ratio, and reverberation time in the rooms. Thi...
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| Published in | Applied acoustics Vol. 104; pp. 50 - 56 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.03.2016
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0003-682X 1872-910X |
| DOI | 10.1016/j.apacoust.2015.10.017 |
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| Abstract | Speech intelligibility in classrooms affects the learning efficiency of students directly, especially for the students who are using a second language. The speech intelligibility value is determined by many factors such as speech level, signal to noise ratio, and reverberation time in the rooms. This paper investigates the contributions of these factors with subjective tests, especially speech level, which is required for designing the optimal gain for sound amplification systems in classrooms. The test material was generated by mixing the convolution output of the English Coordinate Response Measure corpus and the room impulse responses with the background noise. The subjects are all Chinese students who use English as a second language. It is found that the speech intelligibility increases first and then decreases with the increase of speech level, and the optimal English speech level is about 71dBA in classrooms for Chinese listeners when the signal to noise ratio and the reverberation time keep constant. Finally, a regression equation is proposed to predict the speech intelligibility based on speech level, signal to noise ratio, and reverberation time. |
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| AbstractList | Speech intelligibility in classrooms affects the learning efficiency of students directly, especially for the students who are using a second language. The speech intelligibility value is determined by many factors such as speech level, signal to noise ratio, and reverberation time in the rooms. This paper investigates the contributions of these factors with subjective tests, especially speech level, which is required for designing the optimal gain for sound amplification systems in classrooms. The test material was generated by mixing the convolution output of the English Coordinate Response Measure corpus and the room impulse responses with the background noise. The subjects are all Chinese students who use English as a second language. It is found that the speech intelligibility increases first and then decreases with the increase of speech level, and the optimal English speech level is about 71dBA in classrooms for Chinese listeners when the signal to noise ratio and the reverberation time keep constant. Finally, a regression equation is proposed to predict the speech intelligibility based on speech level, signal to noise ratio, and reverberation time. |
| Author | Qin, Ming Qiu, Xiaojun Du, Xuhao Tao, Jiancheng |
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| CitedBy_id | crossref_primary_10_1017_S0261444824000430 crossref_primary_10_1016_j_apacoust_2021_108082 |
| Cites_doi | 10.1121/1.390495 10.1017/S0272263101004041 10.1121/1.1490363 10.1016/j.specom.2010.08.014 10.1016/j.specom.2010.05.001 10.1121/1.3609122 10.1016/S0016-0032(22)90319-9 10.1121/1.1908510 10.1121/1.1909503 10.1121/1.2382499 10.1121/1.1916380 10.1121/1.428288 10.1121/1.1915716 10.1121/1.384464 10.1121/1.418265 10.1016/j.apacoust.2010.04.005 10.1121/1.2839285 10.1016/j.apacoust.2009.10.004 10.1121/1.1903301 10.1121/1.2216768 10.1121/1.393907 10.1016/0022-460X(64)90057-4 10.1121/1.1953127 10.1121/1.1315291 10.1260/135101007781998929 10.1121/1.428268 10.1016/0003-682X(81)90040-2 |
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| Snippet | Speech intelligibility in classrooms affects the learning efficiency of students directly, especially for the students who are using a second language. The... |
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| SubjectTerms | Chinese listeners Reverberation time Signal to noise ratio Speech level |
| Title | A study on the optimal English speech level for Chinese listeners in classrooms |
| URI | https://dx.doi.org/10.1016/j.apacoust.2015.10.017 |
| Volume | 104 |
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