Pyo Seonghun, Roh Yongrae
School of Mechanical Engineering, Kyungpook National University, Daegu 41556, Korea.
J Acoust Soc Am. 2022 Jun;151(6):3594. doi: 10.1121/10.0011515.
Multimode Tonpilz transducers operate at longitudinal and flexural vibration modes simultaneously. Consequently, they have wider bandwidths than conventional single-mode transducers. Generally, the performance of Tonpilz transducers is analyzed using the finite element method (FEM), whereas the equivalent circuit method (ECM) has proven to be a fast and efficient alternative to the FEM. However, the ECM for analyzing the acoustic characteristics of multimode Tonpilz transducers has not yet been developed. To address this issue, an equivalent circuit for the multimode Tonpilz transducer is developed herein. The proposed ECM encompasses the flexural characteristics of the Tonpilz head mass, which is impossible with conventional equivalent circuits. Furthermore, a prototype of the multimode Tonpilz transducer was fabricated to verify the validity of the developed ECM. Additionally, the accuracy and compliance of the ECM were confirmed by comparing the measured performance of the transducer with that from the equivalent circuit analysis.
多模Tonpilz换能器同时在纵向和弯曲振动模式下工作。因此，它们比传统的单模换能器具有更宽的带宽。一般来说，Tonpilz换能器的性能使用有限元方法（FEM）进行分析，而等效电路方法（ECM）已被证明是FEM的一种快速有效的替代方法。然而，用于分析多模Tonpilz换能器声学特性的ECM尚未得到开发。为了解决这个问题，本文开发了一种用于多模Tonpilz换能器的等效电路。所提出的ECM包含了Tonpilz头部质量块的弯曲特性，这是传统等效电路无法实现的。此外，制作了多模Tonpilz换能器的原型，以验证所开发的ECM的有效性。此外，通过将换能器的测量性能与等效电路分析的性能进行比较，确认了ECM的准确性和适用性。
