250 Hz~8 kHz频率范围水听器自由场校准补充比对

摘要

介绍了以杭州应用声学研究所作为主导实验室与俄罗斯国立物理技术和无线电工程测量研究院开展COOMET. AUV. W-S1：250 Hz~8 kHz频率范围水听器自由场校准国际补充比对的结果。比对校准了两只标准水听器TC 4033和GI 55。互易法和比较法及其校准装置被用于评估中俄两国在水听器自由场低频校准方面的当前水平。结果显示，中俄两国得到的两只标准水听器的自由场灵敏度校准结果具有很好的一致性，绝大多数频率点的校准结果与参考值的差值小于0.40 dB，最大偏差为0.59 dB。结果证明，中俄两国的自由场水听器校准低限可扩展至250 Hz。%A description is given of the results of COOMET. AUV. W-S1 supplementary comparison of free-field hydrophone calibration in the frequency range 250 Hz to 8 kHz between Hangzhou Applied Acoustics Research Institute-a pilot and Russian National Research Institute for Physicotecnical and Radio Engineering Measurements. Two standard hydrophones of TC 4033 and GI 55 were calibrated in this comparison. Reciprocity and comparison methods, their calibration facilities were used to assess the current state of free-field hydrophone calibration in low frequencies. The results indicate that the sensitivities of two hydrophones calibrated by China and Russia have good consistency. The deviations at most frequncies between the sensitivites and their reference values are less than 0. 40 dB,the maximum deviation is 0. 59 dB. The results prove that the lowest frequency of free-field hydrophone calibration of China and Russia can be extended to 250 Hz.