Generation of extremely nonlinear standing-wave field using loudspeaker-driven dissonant tube.
Generation of extremely nonlinear standing-wave field using loudspeaker-driven dissonant tube.
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DOI：
10.1121/1.5026514
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发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
Qi Min
中科院分区：
文献类型：
--
作者：
Qi Min
提出了一种产生非线性、纯驻波场的方法，利用市售的普通扬声器驱动容易制造的驻波管在第一峰共振频率，而不是传统的谷共振频率。利用传递矩阵分析了均匀横截面（STUS）、锥形横截面（STTS）和突然横截面（STAS）驻波管的不谐特性，实验得到了在单个第一共振频率下声压级达到185 dB的极非线性纯驻波场。实验研究了瞬态天线、瞬态天线和瞬态天线中非线性纯驻波场的演化特性。结果表明，STAS为产生极非线性的纯驻波场提供了一种很好的方法。
A method of generating nonlinear, pure standing-wave fields is proposed using a commercially available ordinary loudspeaker to drive easily manufactured dissonant standing-wave tubes at the first peak resonance frequencies, instead of traditional valley ones. With the transfer matrix, the dissonant properties of such standing-wave tubes with uniform cross-section (STUS), with tapered cross-section (STTS), and with abrupt cross-section (STAS) were analyzed, and extremely nonlinear pure standing-wave fields were obtained experimentally, whose sound pressure level reached 185 dB at the individual first resonance frequencies. The evolution properties of the nonlinear pure standing-wave fields in the STUS, STAS, and STTS were also investigated experimentally. The results show that the STAS provides a good approach to creating extremely nonlinear pure standing-wave field.