Calibration prodecure step 2
P r e s s u r e
C h a m b e r
M e t h o d
10Hz...500Hz
Direct compare of EMX-7150 against a
Lab Standard Refernce Microphone
using sine sweep signal *1
*1 Freefield microphones as well as pres-
sure response microphones have the sa-
me frequency response behavior at low
frequencies.
60 dBspl LEVEL LINEARITY
Each microphone is SPL linearity checked
against class 1 tolerances (+/- 0,8dB) as
per IEC 61672-1 (2013)
