CAJ | 학술논문

提出了一种在充水阻抗管中,应用传递函数测量材料声学性能的三参数校准方法.在双传感器传递函数法的基础上,考虑充水阻抗管中水听器间不一致性和管内结构对声场局部扰动等因素的校准,导出了三个综合的无量纲校准参数.通过改变充水阻抗管中测量面的三个已知反射系数,测量出对应的三个传递函数,可以求出这三个校准参数.在充水阻抗管中分别对水/空气界面和一种水声材料进行了测量试验,应用该方法对测量结果的进行了校准,并对校准前后的结果进行了分析比较.
제출료일충재충수조항관중,응용전체함수측량재료성학성능적삼삼수교준방법.재쌍전감기전체함수법적기출상,고필충수조항관중수은기간불일치성화관내결구대성장국부우동등인소적교준,도출료삼개종합적무량강교준삼수.통과개변충수조항관중측량면적삼개이지반사계수,측량출대응적삼개전체함수,가이구출저삼개교준삼수.재충수조항관중분별대수/공기계면화일충수성재료진행료측량시험,응용해방법대측량결과적진행료교준,병대교준전후적결과진행료분석비교.
A three-parameter calibration method are presented in measurements of acoustic characteristics of mate-rials in a water filled impedance tube using transfer functions. Based on two-sensor transfer function method, three dimensionless calibration parameters are derived to calibrate the variance between the two hydrophones and the local perturbation of small structures in the tube, etc. These calibration parameters can be figured out by measuring the three transfer functions of three different but known reflection coefficients of the measurement plane in the water filled impedance tube. The acoustic characteristics of the water/air interface and a kind of underwater material are measured respectively in the water filled impedance tube. The measurement results are compared before and after using the calibration method.