宽频技术在水声记录单元校准中的应用  

Applied Method of Broadband Technique in the Calibration of Underwater Recording Element

作　　者：陈晟[1] 牛富强[1] 阮海林[1] CHEN Sheng;NIU Fuqiang;RUAN Hailin(Third Institute of Oceanography, State Oceanic Administration, Fujian Xiamen 361000China)

机构地区：[1]国家海洋局第三海洋研究所,福建厦门36100

出　　处：《电声技术》2018年第2期51-53,64,共4页Audio Engineering

摘　　要：在记录水下声音信号时,首先要完成水声记录单元的系统校准。传统的水池测试一般使用单频声脉冲测量技术,受限于水池的尺度,测量的频段一般高于2 k Hz,而且操作时间长,花费高。将被测水声记录单元与BK3560pulse测量系统同时进行水下爆炸声源信号记录,通过采用宽频技术,提取各个频率点的数据,比对和计算后,可以实现水声记录单元声压灵敏度在(100 Hz^2 k Hz)频段内的快速校准。该方法的结果与传统单脉冲测试结果在3 d B的误差范围内结果一致,证明了该方法的有效性和正确性。该方法还可以同时校准多个水声记录单元。When recording the underwater acoustic signal,the system for recording underwater acoustic signal should be calibrated firstly. Conventionally,calibration was taken in the water poor. The technology of single-frequency acoustic signals was used. That would be limited by the size of the water pool,which lead the lowest frequency of the calibrated frequency band above 2 k Hz. Moreover,the time of the operations is too long. By applying the method of broadband technique,using underwater acoustic recording element and BK 3560 pulse recording system to record the underwater explosion’s signal at same time,after be compared and calculated,the acoustic pressure sensitivity of the underwater recording element can be given in the frequency band of 100 Hz ~ 2 k Hz quickly. Experiment shows that the results are in good agreement with the traditional single-frequency methods,as error is within the range of 3 d B. It proves the effective and accuracy of the calibration. The method can also be calibrated many underwater acoustic recording systems at one time.

关 键 词：校准 频段 灵敏度 宽频技术 

分 类 号：TN822[电子电信—信息与通信工程]