Acoustic Measurement Precision And Uncertainty - FujiFilm VisualSonics Vevo MD User Manual

Acoustic measurement precision and uncertainty

All table entries have been obtained at the same operating conditions that give rise to
the maximum index value in the first column of the table. Measurement precision and
uncertainty for power, pressure, intensity, and other quantities that are used to derive
the values in the acoustic output table are shown in the table below. In accordance
with Section 6.4 of the Output Display Standard, the following measurement precision
and uncertainty values are determined by making repeat measurements and stating
the standard deviation as a percentage.
Acoustic measurement precision and uncertainty for UHF22
Quantity
(% of standard deviation)
P
r
P
r.3
Wo
fc
PII
PII
.3
Acoustic measurement precision and uncertainty for UHF48
Quantity
(% of standard deviation)
P
r
P
r.3
Wo
400 Appendices
Precision
7.3
7.8
10.9
0.4
12.2
15.2
Precision
26.5
27.5
18.2
Uncertainty (%)
(95% confidence)
+37.7 to -37.7
+38.4 to -38.4
+75.1 to -75.2
±3.0
+74.7 to -74.8
+76.3 to -76.1
Uncertainty (%)
(95% confidence)
+56.3 to -58.1
+57.0 to -58.8
+108.1 to -112.9