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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Piezoelectric two-layer stacks of cellular polypropylene ferroelectrets: transducer response at audio and ultrasound frequencies
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Piezoelectric two-layer stacks of cellular polypropylene ferroelectrets: transducer response at audio and ultrasound frequencies

机译：蜂窝聚丙烯铁电驻极体的压电两层堆叠：音频和超声频率下的换能器响应

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摘要

Piezoelectric cellular polypropylene films, so-called ferroelectrets, are assembled in a stack with two active transducer layers. The stack is characterized with respect to its linear and quadratic response in a frequency range from 1 kHz to 80 kHz. A relatively smooth frequency response in the sound-pressure level is found for the individual layers as well as for both layers driven in phase. The piezoelectric response of the two-layer stack is twice the response of an individual layer over a rather broad frequency range. Furthermore, the influence of the preparation conditions on the resonance frequency and the effect of the quadratic distortion on the radiated sound are investigated both for the individual transducer films in the stack and for the stack system as a whole.
机译：压电多孔聚丙烯薄膜，即所谓的铁电驻极体，与两个有源换能器层堆叠在一起。电池组的特征是在1 kHz至80 kHz的频率范围内具有线性和二次响应特性。对于单个层以及同相驱动的两个层，在声压级上都发现了相对平稳的频率响应。在相当宽的频率范围内，两层堆栈的压电响应是单个层响应的两倍。此外，对于堆叠中的各个换能器膜以及整个堆叠系统，都研究了制备条件对共振频率的影响以及二次失真对辐射声的影响。

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