Analysis of vowel sound spectrum in shipboard naval personnel during prolonged deployment at sea
10.3760/cma.j.issn.1009-6906.2014.01.006
- VernacularTitle:舰员长航前后元音声谱变化分析
- Author:
Jiancheng ZHANG
1
;
Xiaohua WANG
1
;
Hongyuan ZHOU
1
;
Meng DING
1
;
Zhongfu LI
1
Author Information
1. 海军医学研究所, 上海,200433
- Publication Type:Journal Article
- Keywords:
Fatigue;
Prolonged deployment at sea;
Sound spectrum;
Formant
- From:
Chinese journal of nautical medicine and hyperbaric medicine
2014;21(1):22-25
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe effects of prolonged deployment at sea on vowel sound spectrum in shipboard naval personnel.Methods Voice signals were collected in the 10 shipboard naval personnel in the initial,middle and late stages of the prolonged deployment at sea.Pratt software was used to analyze parameters of the sound spectrum,such as fundamental frequency,intensity,and vowel formant,so as to observe the effects of prolonged deployment at sea on features of the vowel sound spectrum.Results Such were the results of the feature analysis of the vowel sound spectrum:fundamental frequency decreased to some extent (the fundamental frequencies of [a],[i] and[u] vowels in the initial stage of the prolonged deployment at sea were (160.10 ± 19.94),(158.69 ± 25.63) and (160.08 ± 23.51) Hz) respectively,while the fundamental frequencies of the said vowels in the late stage of the prolonged deployment were(141.14 ± 17.62),(139.57 ± 13.43)and (145.37 ± 16.24) Hz] respectively.Sound intensity also decreased:in the initial stage of the prolonged deployment at sea,sound intensity data of [a],[i] and [u] vowels were(83.53 ±1.96),(83.75 ± 1.91)and(83.25 ± 1.80) Hz respectively,while those of the said vowels in the late stage of the prolonged deployment were (81.08 ± 2.04),(81.29 ± 2.22) and (82.11 ± 4.21) dB] respectively.F1 and F3 formants of [a] and [i] vowels decreased significantly,and F3 of the [u] vowel also decreased significantly,all with statistical significance (P ＜ 0.05).Conclusions Our research indicated that such vowel sound spectrum features as pitch,intensity and timbre could be used as sensitive parameters for the identification of sound fatigue in shipboard naval personnel induced by prolonged deployment at sea.
