iSEMcon 400001, Калибровка

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Pressure field: This is found in small
confined spaces like sound calibrators.
Depending on the nature of the sound
field an appropriate microphone, which is
optimized for the sound field could be
selected. Unfortunately there are many
practical situations where the sound field
is not really of a well defined type. This
application note should give you an idea
on how to measure with a free field re-
sponse microphone.
The free field microphone is the most
common in use, chosen on tradition but
we should know about the sound field.
The following picture shows both the free
field and the diffuse field response of a
free field microphone.