Table 7.
Experimental and simulated spatial average of the delay (δ̂ and δ) and transmitted energy (P̂ and P) for specimen IV. The spatial averages of δ̂ and δ were calculated on the XY region showing normalized pressure greater than 0.5 in water-only conditions. The transmitted powers P̂ and P were calculated over the whole XY plane of the measurements. |Δ| indicates the absolute of the difference.
| 270 kHz | ||||||||
|---|---|---|---|---|---|---|---|---|
| Specimen | Loc. |
δ̂ (µs) |
δ (µs) |
|Δ| (µs) |
P̂ % |
P % |
|Δ| % |
Ξ |
| IV | 1 | −1.29 | −0.36 | 0.93 | 22 | 3.7 | 18 | 0.32 |
| 2 | 1.88 | 0.82 | 1.06 | 12 | 3.6 | 8.6 | 0.32 | |
| 3 | 1.53 | 1.85 | 0.32 | 7.3 | 7.4 | 0.15 | 0.18 | |
|
| ||||||||
| Mean (±s.d.) | 0.77(±0.32) | 9.1(±7.5) | 0.27(±0.07) | |||||
| 836 kHz | ||||||||
|---|---|---|---|---|---|---|---|---|
| Specimen | Loc. |
δ̂ (µs) |
δ (µs) |
|Δ| (µs) |
P̂ % |
P % |
|Δ| % |
Ξ |
| IV | 1 | 0.69 | 0.23 | 0.46 | 4.4 | 0.8 | 3.6 | 0.29 |
| 2 | 0.69 | 0.22 | 0.47 | 4.2 | 0.4 | 3.8 | 0.44 | |
| 3 | 0.94 | −0.04 | 1.00 | 0.07 | 0.01 | 0.02 | 0.48 | |
|
| ||||||||
| Mean (±s.d.) | 0.65(±0.27) | 2.5(±2) | 0.4(±0.08) | |||||