| 室内声学测量中数字化声源性能的分析 |
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| 引用本文： | 赵跃英,盛胜我,刘海生.室内声学测量中数字化声源性能的分析[J].声学技术,2003,22(3):143-146. |
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| 作者姓名： | 赵跃英 盛胜我 刘海生 |
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| 作者单位： | 同济大学声学研究所,上海,200092 |
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| 基金项目： | 国家自然科学基金资助项目前期研究工作成果之一(50078038) |
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| 摘 要： | 文章选取了三种典型的数字化声源信号：膺噪声、线性调频声及调幅脉冲波包进行分析，阐明了它们的共同优点及各自的特点。其中膺噪声的应用较为普遍，而线性调频声则由于其原理简单，在实际测量中具有更大的优越性。提出了在混响时间足够长的房间内作测量时，可以不考虑扬声器本身的响应对测量结果所产生的影响。
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| 关 键 词： | 室内声学测量 数字化声源 膺噪声 线性调频声 调幅脉冲波包 |
| 文章编号： | 1000-3630(2003)03-0143-04 |
| 收稿时间： | 2002/10/28 0:00:00 |
| 修稿时间： | 2002年10月28 |
Characteristics of modern digital sound sources for room acoustical measurement |
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| ZHAO Yue-ying,SHENG Sheng-wo and LIU Hai-sheng.Characteristics of modern digital sound sources for room acoustical measurement[J].Technical Acoustics,2003,22(3):143-146. |
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| Authors: | ZHAO Yue-ying SHENG Sheng-wo and LIU Hai-sheng |
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| Affiliation: | Institute of Acoustics, Tongii University, Shanghai 200092, Chian;Institute of Acoustics, Tongii University, Shanghai 200092, Chian;Institute of Acoustics, Tongii University, Shanghai 200092, Chian |
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| Abstract: | In this paper, three types of typical digital sound sources, pseudonoise, linear sweep, and impulse-shaped signals, are analyzed. Their common advantages and individual characteristics are described. Pseudonoise is a common source, while sweep is more advantageous in practical applications due to its simple operation principle. If reverberation time of room is long enough, influence of the loudspeaker response on measurements is negligible. |
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| Keywords: | digital sound source pseudonoise linear sweep impulse-shaped signal |
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