On the basis of experiments, in which laser pulses were applied as a source of standard AE signals, it was established that the pressure characteristics of the sensitivity of AE sensors for in situ measurements under high pressures, made of monocrystalline quartz and lithium niobate, can be described by the linear or parabolic functions for pressures upto 1 GPa.

The effect of changes in properties of the most applicable liquid medium for high pressure experiments - extraction naphtha, and the most frequently used bonding material - nonaq stopcock grease, on the number and amplitude of detected AE signals are estimated in the same pressure range from atmospheric to 1 GPa. These effects can be partially compensated by the application of a special sensor made of lithium niobate which has a positive dependence of its sensitivity on pressure.

The examples of estimation for the accuracy of AE measurements are given for some high pressure AE phenomena during isomorphic phase transitions in cerium, twinning in the polycrystalline zinc and microcracking in the Li₂Ai₃Ti intermetallic compound.