*Ryusuke SAKON¹, Chihiro IWAMOTO², Hayahito KUROKI³, Yuka SHIMIZU¹, Tomoki MATSUDA⁴, Tomo OGURA⁴, Tomokazu SANO⁴, Akio HIROSE⁴ (1. Ibaraki Univ. (B4), 2. Ibaraki Univ., 3. Ibaraki Univ., 4. Osaka Univ.)

*Xinguang YU¹, Ryota Domen², Isamu Morisako², Keiko Koshiba², Tomonori Iizuka², Kohei Tatsumi² (1. Waseda Univ.(graduate student), 2. Waseda Univ.)

*Ryo MATSUI¹, Katsuhisa NAGAYAMA² (1. SIT, 2. SIT)

*Kazuhiro NANKE¹, Hiromichi OHTA¹, Tsuyoshi NISHI¹ (1. ibaraki university)

*Renjie Zhu¹, Eiji Yamasue², Takehito Hiraki³, Shunsuke Kashiwakura², Shoki Kosai² (1. 立命館大工（院生）、2. 立命館大工、3. 東北大工)

*Yuka SHIMIZU¹, Chihiro IWAMOTO², Hayahito KUROKI³, Ryusuke SAKON¹, Tomoki MATSUDA⁴, Tomo OGURA⁴, Tomokazu SANO⁴, Akio HIROSE⁴ (1. Ibaraki Univ.（B4）, 2. Ibaraki Univ., 3. Ibaraki Univ., 4. Osaka Univ.)

*Tomoya Ishitsuka¹, Chihiro Iwamoto³, Seriya Komai², Ryotaro Horiuchi², Shigeo Sato³, Hirofumi Takao⁴, Youichi Hashimoto⁴, Kensuke Hamada⁵ (1. Ibaraki Univ.(B4), 2. Ibaraki Univ., 3. Ibaraki Univ., 4. I-PEX Co., Ltd., 5. Ultrasonic Engineering Co., Ltd.)

*Takashi MURATA¹, Katsunori YAMAGUCHI² (1. Waseda University Creative Science and Engineering, 2. Waseda University Creative Science and Engineering)