99 (Figure 4). Using a parabolic curve fit overlaid on the experimental volume results allowed subsequent measurements to be made Pacritinib phase 3 within 3 mL of the actual values when measuring water (Figure 5). This represents an accuracy of better than ��0.1% Inhibitors,Modulators,Libraries of the resonator��s volume (3 L). Repeatability for a given measurement was generally ��1 mL when successive measurements were made on the same volume.Figure 3.Measured resonant frequency and predicted resonant frequency for varying water fill using 3 L chamber, 170 mm long, Inhibitors,Modulators,Libraries and 44 mm diameter port.Figure 4.Actual water volume versus deviation volume (VP ? VA) using Helmholtz equation with 3 L chamber, 170 mm long, and 44 mm diameter port.Figure 5.Actual water volume versus corrected deviation volume (VP ? VA) using Helmholtz equation with second order correction.

Measured using 3 L chamber, 170 mm long, and 44 mm diameter port.The reason for a second order deviation is unclear, but could be due to secondary effects caused by implicit assumptions Inhibitors,Modulators,Libraries made in simplifying acoustical theory used to generate the Helmholtz equation, see for example Blackstock [3]. These assumptions include the small signal approximations made to allow linearisation and the completion of the wave equation. Also, various small angle approximations are made in lumped parameter analysis within transmission theory. Because frequency measurements were being made to such a high accuracy these seemingly unimportant small terms may now be significant. The Q factor is an important indicator of resonant strength.

It was observed that the Q factor remained steady at approximately 60 (Figure 6) up to a fill of 2.5 L in a 3 L chamber.Figure 6.Q factor with increasing water fill level, measured using 3 L chamber, 170 mm long, and 44 mm diameter port.The success in the predictive capabilities is in part due to the consistently high Q factor. This maintained the resolvability of the resonant Inhibitors,Modulators,Libraries peak. Also, the high Q factor is indicative of low energy absorption by the water. At greater fill levels the water approached the Brefeldin_A
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