The method for simultaneous measurement of pressure and average mass flow rate in the dynamic recording mode in the conditions of the T-313 wind tunnel of ITAM SB RAS is presented. Experimental studies were carried out in the mode M = 2.04, Re1 = (15-25)·106, and T0 = 283 K. Measurement was carried out in the near field of a sonic boom. Distributions of average mass flow were measured using a constant-resistance thermoanimeter CTA-2016 (v.2).