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http://hdl.handle.net/10119/14712
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| Title: | Acoustical Analyses of Tendencies of Intelligibility in Lombard Speech with Different Background Noise Levels |
| Authors: | Ngo, Thuan Van
Kubo, Rieko
Morikawa, Daisuke
Akagi, Masato |
| Issue Date: | 2017 |
| Publisher: | 信号処理学会 |
| Magazine name: | Journal of Signal Processing |
| Volume: | 21 |
| Number: | 4 |
| Start page: | 171 |
| End page: | 174 |
| DOI: | 10.2299/jsp.21.171 |
| Abstract: | This study investigates acoustic variations when producing Lombard speech under the effect of a changing environment to identify adaptive tendencies of intelligibility. Analyses of the acoustic features of duration, F0, formants, spectral tilts and modulation spectrum in a dataset of speech at noise levels of - ∞, 66, 72, 78, 84, and 90 dB were carried out. The results show that the recognized tendencies (neutral-Lombard distinction), including lengthening vowel duration, increasing F0, shifting F1 and decreasing spectral tilts (A1-A3) are preserved among Lombard speech produced in backgrounds with a various noise levels. Our new findings are an abrupt change in F0 at 84 dB, increasing formant amplitudes, and H1-H2 variation, and a raised modulation spectrum. On the basis of physiological and psychological knowledge, we can give reasons for their correlations with intelligibility. Moreover, these variations continuously vary with increasing noise level. As a result, it is suggested that they are related to the adaptive tendencies of intelligibility. |
| Rights: | Copyright (C) 2017 信号処理学会. Thuan Van Ngo, Rieko Kubo, Daisuke Morikawa, Masato Akagi, Journal of Signal Processing, 21(4), 2017, 171-174. http://dx.doi.org/10.2299/jsp.21.171 |
| URI: | http://hdl.handle.net/10119/14712 |
| Material Type: | publisher |
| Appears in Collections: | b10-1. 雑誌掲載論文 (Journal Articles)
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| JSP2017_Ngo.pdf | | 312Kb | Adobe PDF | View/Open |
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