基于近场声全息的高频换能器阵列声场测量方法

在二维平面声压构建技术理论基础上,结合空间傅里叶变换的近场声全息技术,提出一种高测量效率的声场测量方法。以由4个压电元件所构成的矩形活塞换能器阵列为测量对象,进行声场仿真和实验测量,验证该测量方法的测量精度与效率。结果表明,该方法相比面扫描法测量效率提高了560倍,相比积分法计算速度提高两倍,可有效应用于高频换能器阵列的声场测量。

High-frequency Transducer Array Sound Field Measurement Method Based on Near-field Acoustic Holography

Based on the theory of two-dimensional plane acoustic pressure construction technology, combined with the spatial Fourier transform near-field acoustic holography technology, a sound field measurement method with high measurement efficiency was proposed. A rectangular piston transducer array composed of four piezoelectric elements was used as a measurement object, and the sound field simulation and experimental measurements were performed to verify the measurement accuracy and efficiency of the measurement method. The results showed that the method improves the measurement efficiency by 560 times compared with the surface scanning method. Compared with the integration method, the calculation speed increases by two times. This method can be effectively applied to the sound field measurement of high-frequency transducer arrays.