Design optimisation of ultrasonic hydrophones with inconsistent crossover calibrations

精密声学是全球领先的水听器、换能器、声学材料和超声波频率扫描系统供应商。水听器是为水下使用而设计的压力测量装置。水听器可以探测到由声音或超声波引起的压力变化，因此水听器可用于精确测量超声波场。精密声学制造各种设计的水听器，适用于各种应用的测量。该项目着眼于协调和理解100- 400 kHz交叉频率范围内针形水听器校准制度之间差异的创新方法，该方法在治疗医学或声纳/水下领域均有应用。对水听器内部结构的修改将进行建模和测量。由于在水下声学（kHz）和医学超声（MHz）领域中常规使用的校准制度本身的限制将通过使用参数阵列产生的声场的应用来结合解决。

Precision Acoustics is a leading global supplier of hydrophones, transducers, acoustic materials and scanning systems for ultrasonic frequencies.Hydrophones are pressure measurement devices designed for underwater use. Variations in pressure, such as those induced by sound - or ultrasound - can be detected by the hydrophone, thus hydrophones are used for precise measurement of ultrasound fields. Precision Acoustics manufactures a variety of designs of hydrophone which lend themselves to measurement of all sorts of applications.This project looks at innovative ways of reconciling and understanding differences between hydrophone calibration regimes for the needle hydrophones in the crossover frequency region of 100--400 kHz, which has applications both in, for example, therapeutic medical or sonar/underwater areas. Modifications to the internal structure of the hydrophone will be modelled and measured. The restrictions due to the calibration regimes themselves routinely used in the underwater acoustics (kHz) and medical ultrasound (MHz) areas will be combinedly addressed by the application of acoustic fields generated using parametric arrays.