Random (diffuse field) response
The instrument is equipped with a microphone with flat free-field response and satisfies the class 1 requirements
in IEC 61672-1 to free-field response. By selecting the random response correction network included, the instrument
will satisfy the class 1 requirements in IEC 61672-1 to random response as well as ANSI S1.4-1997 type 1.
Windscreen
The instrument may be used with windscreen Nor1451. The windscreen correction has to be switched on to obtain the
stated specifi cations when the windscreen is mounted.
Preamplifier gain
The instrument has the ability to correct for the gain in the preamplifier. Typical value of the gain is
0.2 to 0.7 dB. The correction can be set in the range 0.0 to 10.9 dB. The correction can be switched on/off to facilitate
applications of other transducers without preamplifier. The correction is automatically switched off if IEPE-type of
preamplifier is selected.