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发展了一种应用于流管实验装置的现场传声器阵列校准方法.该方法利用两支标准传声器的测量结果计算管内声场,然后比对待校准传声器的测量信号得到其灵敏度.与传统校准方法相比,该方法具有实时快速、能提供相位校准等优点.在流管装置上进行实验,用模态匹配方法对校准结果进行校核,显示该校准方法得到的声压与计算结果吻合得更好.使用本方法,利用高精度传声器对低精度传声器进行校准并应用,可有效降低测量实验成本.
A method for field microphone array calibration is developed, which is used in the experiment of flow tube. This method uses the measurement results of two standard microphones to calculate the sound field in the tube, and then obtains the sensitivity of the measured signal of the microphone to be calibrated.Compared with the traditional calibration method, The method has the advantages of fast real-time, phase calibration, etc. Experimenting on a flow tube device and using a modal matching method to check the calibration result shows that the sound pressure obtained by the calibration method is in good agreement with the calculated result. This method, the use of high-precision microphones for low-precision microphone calibration and application, can effectively reduce the cost of measurement experiments.