Method and device for determining the acoustic parameters of...

Details Method and device for determining the acoustic parameters of... Method and device for determining the acoustic parameters of...

2008-01-15

2008-01-15

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

C702S023000

Reexamination Certificate

active

10485431

ABSTRACT:
A method for determining acoustic parameters of a liquid (1) in a resonator arrangement having a resonator chamber (2) includes the following steps: acoustic excitation of the liquid in the resonator chamber (2) in such a way that a sequence of liquid resonances is excited in a frequency range in which the wall material of the resonator chamber (2) and/or associated transducers (6) have natural resonances with amplitude different from zero, and measurement of the associated resonance frequencies of the liquid in the resonator chamber (2); determining an observed deviation of the measured resonance frequencies from ideal resonance frequencies in an ideal resonator corresponding to the resonator chamber (2); calculating a simulation function (yk), which is a function of the acoustic parameters of the liquid (1) and represents calculated deviations of the resonance frequencies from the ideal resonance frequencies; adapting the calculated deviations to the observed deviations through variation of the acoustic parameters of the simulation function (yk); and deriving the acoustic parameters sought from the adapted simulation function (yk). A resonator arrangement for implementing the method is also described.

REFERENCES:
patent: 4862384 (1989-08-01), Bujard et al.
patent: 6216091 (2001-04-01), Hammond
patent: 6644119 (2003-11-01), Sinha

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