  The article discusses methods for measuring the speed of sound, scattering,
attenuation and absorption of sound in liquids, on the basis of which the
structural diagrams of modern devices have been developed. In real conditions,
acoustic measurement schemes are not ideal and depending on specific structure
may give different results. The technical and metrological characteristics of
the measuring channels of modern acoustic devices are presented.
Recommendations are given for the use of GOST in acoustic measurements and it
is stated that the metrological characteristics of newly created measuring
instruments operating in in situ conditions are at the level of State primary
standards.
