Reference
- Takahashi M, Takahashi O, Hoshino H, Ogura Y, Nishino H, Kawashima K: ‘Characteristics of probes for non contact air coupled ultrasonic testing’, Proc. 17th Symp. on ‘Ultrasonic testing’, Sendai, Japan, October 2008, Japanese Society for Non‐destructive Inspection, 81–86.