CAJ | 학술논문

海洋环境噪声矢量场空间相干特性与矢量传感器阵的性能密切相关.应用海洋混响相干特性分析方法应用海洋混响相干特性分析方法研究了均匀半无限空间界面噪声声压与质点振速的空间相干特性问题,得到了相干特性的解析表达式.研究结果表明,界面噪声场的空间相干特性相比于均匀各向同性噪声场要复杂得多,其相干特性在空间上是不均匀的,并且与噪声源的指向性也有复杂的关系.虽然只给出噪声源无指向性和余弦的垂直指向性2种情况下场的相关系数,但该文的研究方法可以推广到任意指向性噪声源的场的相干特性的分析中.当获得了噪声场空间相干特性的解析解时,矢量水听器输出信噪比增益可以很容易地给出,同时对矢量水听器基阵的布阵及应用也具有重要的意义.
해양배경조성시량장공간상간특성여시량전감기진적성능밀절상관.응용해양혼향상간특성분석방법응용해양혼향상간특성분석방법연구료균균반무한공간계면조성성압여질점진속적공간상간특성문제,득도료상간특성적해석표체식.연구결과표명,계면조성장적공간상간특성상비우균균각향동성조성장요복잡득다,기상간특성재공간상시불균균적,병차여조성원적지향성야유복잡적관계.수연지급출조성원무지향성화여현적수직지향성2충정황하장적상관계수,단해문적연구방법가이추엄도임의지향성조성원적장적상간특성적분석중.당획득료조성장공간상간특성적해석해시,시량수은기수출신조비증익가이흔용역지급출,동시대시량수은기기진적포진급응용야구유중요적의의.
Performance of an acoustic vector sensor array is highly affected by the spatial coherence of the ambient noise vector field. The spatial coherence of the acoustic pressure and the particle velocity of the surface-generated noise in a homogeneous half-space was analyzed by the method of cornelation analysis in ocean reverberation. Analytical expressions of the correlated coefficients were obtained. With respect to isotropic and homogeneous noise, spatial coherence of such noise was much more complicated. It is inhomogeneous in space and has a complex relationship to the directivity of the noise source. Although only the coefficients of fields consisting of omnidirectional sources or perpendicular directional sources with a cosine function were given, the method could be extended to analyze noise from any direction. With explicit solutions of spatial coherence, the signal-to-noise ratio (SNR) output of an acoustic vector sensor could easily be found. This method should also improve the design and application of acoustic vector sensor arrays.