The results from air-coupled impact-echo(IE) tests into concrete slab should be interpreted and represented so that field engineers can effectively check the condition of the structure. To improve these issues, IE data in the form of “4-D spectrum plot” can be utilized to identify the information of concrete defects effectively. The concept of the 4-D plot is introduced, and the effects of image parameters (e.g. frequency range, transparency index) are experimentally investigated in this study.

• 한대희(인천대학교 안전공학과 석사과정) | Han, Dae Hee
• 이연수(인천대학교 안전공학과 박사과정) | Lee, Yeon Soo
• 오태근(인천대학교 안전공학과 교수, 공학박사) | Oh, Tae Keun 교신저자