| 赵渊博,侯宏,孙亮.收发合置水声管中使用宽带脉冲的吸声测量方案[J].声学技术,2014,33(3):213~217 |
| 收发合置水声管中使用宽带脉冲的吸声测量方案 |
| An improvement scheme of broadband sound absorption measurement in water-filled impedance tube with monostatic transducer |
| 投稿时间：2012-11-19 修订日期：2013-02-25 |
| DOI：10.3969/j.issn1000-3630.2014.03.006 |
| 中文关键词: 收发合置换能器 脉冲声 宽带测试 |
| 英文关键词: monostatic transducer impulsive sound measurement in broadband frequency range |
| 基金项目:国家自然科学基金资助项目（11204242） |
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| 中文摘要: |
| 水声管是水声材料吸声测量的重要实验平台。对于收发合置换能器水声管系统，目前常用的吸声测量信号是调制正弦信号。为了实现宽带测试，提出了水声管中宽带声脉冲的产生方法，并设计了电子开关延时控制电路。给出了基于收发合置型换能器水声管中宽带吸声测量结果。 |
| 英文摘要: |
| Water-filled impedance tube is an important platform for sound absorption measurement. For the test system with monostatic transducer, the common used signal is the pulse modulated sine-wave, which is essentially a single frequency measurement. In order to implement broadband sound absorption measurement, an impulsive sound is generated in water-filled impedance tube, and a time sequence control system is designed for the monostatic transducer generating the impulsive sound and picking up the echo-signal. The principle of sound absorption measurement is explained and a test example is shown. |
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