Loud speech over noise:: Some spectral attributes, with gender differences

被引:46
作者
Ternström, S
Bohman, M
Södersten, M
机构
[1] Kungliga Tekn Hogskolan, Dept Speech Mus & Hearing, Stockholm, Sweden
[2] Karolinska Univ Hosp, Dept Logoped & Phoniat, Stockholm, Sweden
关键词
D O I
10.1121/1.2161435
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
In seeking an acoustic description of overloaded voice, simulated environmental noise was used to elicit loud speech. A total of 23 adults, 12 females and 11 males, read six passages of 90 s duration, over realistic noise presented over loudspeakers. The noise was canceled out, exposing the speech signal to analysis. Spectrum balance (SB) was defined as the level of the 2-6 kHz band relative to the 0.1-1 kHz band. SB averaged across many similar vowel segments became less negative with increasing sound pressure level (SPL), as described in the literature, but only at moderate SPL. At high SPL, SB exhibited a personal "saturation" point, above which the high-band level no longer increased faster than the overall SPL, or even stopped increasing altogether, on average at 90.3 dB WO cm) for females and 95.5 dB for males. Saturation occurred 6-8 dB; below the personal maximum SPL, regardless of gender. The loudest productions were often characterized by a relative increase in low-frequency energy, apparently in a sharpened first formant. This suggests a change of vocal strategy when the high spectrum can rise no further. The progression of SB with SPL was characteristically different for individual subjects. (c) 2006 Acoustical Society of America.
引用
收藏
页码:1648 / 1665
页数:18
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