Torraca Paolo La, Bobinger Marco, Servadio Maurizio, Pavan Paolo, Becherer Markus, Lugli Paolo, Larcher Luca
Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, 41125 Modena, Italy.
Chair of Nanoelectrics, Technical University of Munich, 80333 Munich, Germany.
Nanomaterials (Basel). 2018 Oct 14;8(10):833. doi: 10.3390/nano8100833.
In this work, we investigate the thermal and acoustic frequency responses of nanostructured thermoacoustic loudspeakers. An opposite frequency dependence of thermal and acoustic responses was found independently of the device substrate (Kapton and glass) and the nanometric active film (silver nanowires and nm-thick metal films). The experimental results are interpreted with the support of a comprehensive electro-thermo-acoustic model, allowing for the separation of the purely thermal effects from the proper thermoacoustic (TA) transduction. The thermal interactions causing the reported opposite trends are understood, providing useful insights for the further development of the TA loudspeaker technology.
在这项工作中，我们研究了纳米结构热声扬声器的热响应和声频响应。发现热响应和声响应的频率依赖性相反，这与器件衬底（聚酰亚胺薄膜和玻璃）以及纳米活性薄膜（银纳米线和纳米厚金属薄膜）无关。实验结果在一个综合的电热声模型的支持下得到解释，该模型能够将纯热效应与适当的热声（TA）转换分离。导致所报道的相反趋势的热相互作用得到了理解，为TA扬声器技术的进一步发展提供了有用的见解。
