PROBLEM TO BE SOLVED: To provide an acoustic matching body capable of fully passing an acoustic coupling material between an outer surface and a soft object.SOLUTION: An acoustic lens member 22 serving as an acoustic matching body includes a convex-shaped curved surface 27 formed with buses extending in a first direction D1 in parallel with each other. A groove 28 is formed in the curved surface 27. The groove 28 is formed to trace a line of intersection between a plane, which crosses the buses of the curved surface 27, and the curved surface 27. The groove 28 functions as a passage of an acoustic coupling material (medium) such as water. Even when the curved surface 27 is abutted against a soft object, for example, a body surface, the acoustic coupling material such as water can be passed through the entire length of the passage.COPYRIGHT: (C)2015,JPO&INPIT【課題】外表面と柔軟な対象物との間に音響結合材を十分に行き渡らせることができる音響整合体を提供する。【解決手段】音響整合体としての音響レンズ部材22は相互に平行に第1方向D1に延びる母線で形成される凸形状の湾曲面27を有する。湾曲面27には溝28が形成される。溝28は、湾曲面27の母線に交差する平面と湾曲面27との交線を辿るように形成される。溝28は水といった音響結合材(媒体)の通路として機能する。湾曲面27が例えば体表といった柔軟な対象物に押し当てられても、水といった音響結合材は通路の全長にわたって広がることができる。【選択図】図3
