Calibration methods and facilities have been employed to directly obtain sensitivities of an underwater acoustic vector receiver using two methods based on laser Doppler vibrometry. The vector receiver was first calibrated in a standing wave tube over the frequency range 20 Hz to 2 kHz, where the oscillatory velocity of the water-air interface was measured to determine the sound particle velocity at the position of vector receiver based on waveguide theory. In the frequency range 2.5–10 kHz, the vector receiver was calibrated in an anechoic vessel with dimensions of 1.2 m diameter × 1.8 m length using wideband signals, with a laser Doppler vibrometer used to detect the oscillatory motion of a plastic pellicle, which was sufficiently thin to follow the acoustic particle motion. The uncertainties of the calibration using the optical method were estimated to be 0.7–0.8 dB at 95% confidence interval. The calibration results were compared with those obtained using a reciprocity method in a 50 m × 15 m × 10 m water tank and using a comparison method in a standing wave tube, and the largest deviation did not exceed 1.0 dB over the frequency range 20 Hz to 10 kHz.

中文翻译：

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使用激光多普勒测振仪在 20 Hz 至 10 kHz 频率范围内校准矢量接收器的方法和设施

使用基于激光多普勒测振法​​的两种方法，已采用校准方法和设备直接获得水声矢量接收器的灵敏度。矢量接收器首先在 20 Hz 至 2 kHz 频率范围内的驻波管中校准，其中测量水 - 空气界面的振荡速度，以确定基于波导理论的矢量接收器位置处的声粒子速度。在 2.5–10 kHz 频率范围内，矢量接收器在尺寸为 1.2 m 直径 × 1.8 m 长的消声容器中使用宽带信号进行校准，激光多普勒测振仪用于检测塑料薄膜的振荡运动，塑料薄膜是足够薄以跟随声学粒子运动。使用光学方法校准的不确定性在 95% 置信区间估计为 0.7–0.8 dB。将标定结果与在50 m×15 m×10 m水箱中用互易法和在驻波管中用比较法得到的结果进行比较，在20 Hz频率范围内最大偏差不超过1.0 dB到 10 kHz。