Characterization of the acoustic field generated by a horn shaped ultrasonic transducer
Characterization of the acoustic field generated by a horn shaped ultrasonic transducer
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DOI：
10.1063/1.5002103
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发表时间：
2017-09-04
影响因子：
4
通讯作者：
DiChiara, A. D.
中科院分区：
文献类型：
--
作者：
Hu, B.;Lerch, J. E.;DiChiara, A. D.
为了更好地了解声学剖面在建立稳定陷阱中的作用，对用于单轴悬浮器的喇叭形朗之万超声换能器进行了表征。表征的方法包括通过光栅式扫描、超声波麦克风以及喇叭及其与周围空气体积的界面的有限元分析来进行声束分析。模型的计算结果与测量结果吻合较好，证明了该方法在近场和远场分析中的有效性。结果表明，这种换能器能产生总发散角为10度的强声束、靠近换能器表面的近场点和虚拟声源。这些都是用于声学捕捉实验的声源的理想特性。由AIP出版公司出版。
A horn shaped Langevin ultrasonic transducer used in a single axis levitator was characterized to better understand the role of the acoustic profile in establishing stable traps. The method of characterization included acoustic beam profiling performed by raster scanning an ultrasonic microphone as well as finite element analysis of the horn and its interface with the surrounding air volume. The results of the model are in good agreement with measurements and demonstrate the validity of the approach for both near and far field analyses. Our results show that this style of transducer produces a strong acoustic beam with a total divergence angle of 10 degrees, a near-field point close to the transducer surface and a virtual sound source. These are desirable characteristics for a sound source used for acoustic trapping experiments. Published by AIP Publishing.