| 头盔的声学性能测试与分析 |
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| 引用本文： | 田静. 头盔的声学性能测试与分析[J]. 应用声学, 1997, 16(5): 8-12 |
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| 作者姓名： | 田静 |
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| 作者单位： | 中国科学院声学研究所!北京;100080 |
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| 摘 要： | 本文设计了使用自关函数以测试混响声衰变速度、自功率谱以测试插入损失的方法，用于头盔的回声与隔声效果分析。结果表明，这一方法物理概念明确，测试简单，可以定量地说明头盔的声学性能可能存在的问题，可望用于头盔的声学性能额 观测试与分析方法的建立。
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| 关 键 词： | 头盔 回声 隔声 测试 声学性能 |
Measurement and analysis of the acoustical characteristics of helmets |
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| Tian Jing. Measurement and analysis of the acoustical characteristics of helmets[J]. Applied Acoustics(China), 1997, 16(5): 8-12 |
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| Authors: | Tian Jing |
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| Affiliation: | Institute of acoustics chinese academy of sciences,Beijing, 100080 |
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| Abstract: | To analyze the echo effect and sound insulation property of a helmet, aoto-correlations, auto-power spectra of the incident sound signal at the ears are measured.The auto-correlations can give the rate of echo sound decay and the auto-power spectrumdifferences can describe the insertion loss. The physical concept of the method is clearand the measurement is simple. The results can quantitatively explain where the possi-ble problem in the acoustical characteristics of analysed helmets lies. It is prospective toestablish a standard on the objective measurement and analysis of acoustical character-istics of helmets. |
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| Keywords: | helmet echo sound insulation measurement |
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