AMIX AFF-3 Série Manuel Utilisateur page 68

WEB INTERFACE
Correction & limit
Weighting A measurement correction:
Reference level:
Sensor level:
How to determine it: it is enough to broadcast an acoustic level (whatever this level) in pink noise on the
sound system, and with your sound meter in weighting A you measure:
- The overall acoustic level at the sensor for example 98 dB
- The overall sound level at the audience level, for example 93 dB
Simply enter these two values so that the display automatically calculates the difference and indicates
the sound levels corrected for the audience. The measurement range of 60 dB is retained.
Weighting C measurement correction:
The same operation must be performed with your C weighted sound level meter.
If the spectral balance is identical at the sensor level and at the audience level, you can enter the same
values as for the A weighting.
Leq Limit Manager:
Indicate the reference level to be considered for the trend predictor based on leq 1min. See description
A page 7.
If for example sound levels are limited to 102 dBA and 118 dBC on a Leq15 min (new decree), you can
enter these level values for the A and for the C.
The predictive indicator based on 1min will be very useful to anticipate an overrun over 15min.
AMIX
The acoustic level where the audience is most exposed.
The acoustic level at the sensor. This setting is especially important for reliable viewing of
sound levels. Indeed, the level of the sensor, if it is placed near a loudspeaker, will be
higher than that of the public. The difference between these two levels is called either by
the term offset, or more often by the term transfer function.
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AFFseries-3