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EURASIP Journal on Advances in Signal Processing

Table 1 Composition of the test pieces.

From: Geometrical Feature Extraction from Ultrasonic Time Frequency Responses: An Application to Nondestructive Testing of Materials

Test piece

Agar-Agar concentration

of scatterers

mean

1 and 2

2% in distilled water

1000 molecular sieves

0.5 mm

3 and 4

2% in distilled water

1000 molecular sieves

0.7 mm

5 and 6

2% in distilled water

1000 molecular sieves

1.3 mm

7 and 8

2% in distilled water

1000 molecular sieves

1.8 mm

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