A mutual radiation impendence measurement method for 2-element transducer array considering nonlinear interaction

Abstract

Mutual radiation impedances represent the acoustical interaction between transducers in an underwater array, which are inherent in the distance between transducers and the geometry of the array. The influence of mutual radiation impedances, which are important to evaluate the performance of the underwater array, especially needs to be intensively studied on condition that the power of transducers is high enough because of nonlinear interaction. A method for determining mutual radiation impedances of transducers in a 2-element array is proposed in this paper, which applies to estimation of mutual radiation impedances for an underwater array with high radiation power. This method derives from V method in which the mutual radiation impedances are considered as the acousto-motive force generated on the surface of each transducer. By using nonlinear acoustic analysis, theoretical foundations of this method based on equivalent circuits are described. Detailed experimental procedures to implement the method are ...