A technique to calibrate cavity effects was introduced.By combining a simplified theoretical model with experimental verification

the modeling of the transfer function for the pressure probe was established.An ARMAX(autoregressive-moving average with exogenous input) model was used as the base structure of the cavity system and its parameters were identified from experimental data.It is demonstrated that despite its simplicity

this method can well capture the transfer function for the cavity based on the input/output signals

from which the relationship of the true signal and measuring signal can be obtained.This calibration technique is simple and practical

and can be of great value in many applications.