Sonic inspection device, sonic inspection method, and contact member for sonic inspection device

A sonic inspection device comprising:

• a sonic probe including a transducer configured to execute at least one of transmission and reception of a sound wave, the sonic probe having a sonic function surface constituting at least one of surfaces for transmitting the sound wave and for receiving the sound wave;
• a contact member including a first sheet-like member and a second sheet-like member;
• and
• a loading mechanism that applies a load to the sonic probe, wherein the contact member includes:
• the first sheet-like member containing an elastomer and having a first surface that comes into contact with the sonic function surface of the sonic probe directly or with an intermediate member therebetween and a second surface opposite the first surface;
• and
• the second sheet-like member having a plurality of openings and provided in contact with the second surface of the first sheet-like member, and wherein the second sheet-like member includes:
• a base containing a polymer whose Young's modulus at room temperature is higher in Young's modulus at room temperature than the first sheet-like member;
• and
• a high-hardness member provided in at least a part of the base, the high-hardness member being in contact with the second surface and containing at least one selected from the group consisting of a polymer, a metal member, and a ceramic member higher in Young's modulus at room temperature than the base.