Table 2.

Dominant flexural mode according to a/h by defect type.

Type	a/h	Dominant Flexural Mode	Type	a/h	Dominant Flexural Mode
Sound region	-	x	-	-	-
DL-A1	3.33	x	DL-A2	5	x
DL-A3	3.33	x	DL-A4	10	o
DL-A5	5	x	DL-B1	20	o
DL-B2	30	o	DL-B3	40	o
DL-B4	20	o	DL-B5	15	o
DL-B6	10	o	DL-C1	4.62	x
DL-C2	4.62	x	DL-C3	9.23	o
DL-C4	9.23	o	DL-C5	9.23	o
DL-C6	9.23	o	DL-C7	4	x