iSEMcon 400001, Calibration

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response can be approximated by
measuring the 90 deg incidence re-
sponse relative to a single sound
source.
While it is an approximation only iSEM-
con has measured the 90deg response
of many iSEMic microphones and used
the averaged data to evaluate a 5
th
order polynomial. This is now used to
derive the “diffuse field” response from
the microphones free field response
data.
Typical freefield measurement:
Speaker measurement. The micro-
phone should target to the sound
source (speaker).