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 (y.sub.k),
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 (y.sub.k); and deriving the acoustic parameters
sought from the adapted simulation function (y.sub.k). A resonator
arrangement for implementing the method is also described.