MRC AUDIO EQ
Limit
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The band limitation is subordinate to the global limitation;
EQ
Limit
limits per the more
restrictive of the two: if the maximum level is surpassed in any of the bands, the limiter will start
limiting. But if no band reaches its limit but the global sum their level reaches the global limit,
the limiter also starts to limit.
This window has vertical level measuring bars for the normalized bands centre frequency. The
seven lower frequencies are centred in 1/3 octave bands and the five higher frequency bands
in octave bands, having more precision at the lower frequencies because these are more
problematic from the Isolation point of view.
In order to control the limitation, you can choose all 1/3 octave filters or only the eighth octave
band filters with the selection boxes and we can also activate or not each band to be included
in the measurement of the control signal.
To the left of each bar there is numbered scale and a two colour strip: green the lower part and
red the upper part of the strip. The point where the strip changes colour is the limiting level for
that band. Those bands that surpass the limit change from green to red as seen in the previous
figure.
In the numeric box, underneath the bars, the real time level per band is shown with 0.1dB
precision.
Below the band bars there is a matrix of 3 rows x 12 columns numerical boxes, for the
adjustment of the band limits, per two different data groups:
The lower row is the inmision group of data; the middle row is the isolation group of data. The
upper row is the sum of the two and is the resulting limiting value.
The immision is the maximum sound level that can be induced to the neighbour houses. This
level is either global or per bands, depends on local regulations.
The Isolation is the amount of sound isolation existing between the house and the worst case
neighbour.
The upper line is not editable because it is the resulting limiting level calculated by the sum of
inmision and isolation.
To the right of the
Lim
row, the upper row, there is a numerical box where you can set the max
allowed global limit.
To the right of the isolation and inmision rows, there is a group of boxes an buttons that aid in
the fulfilment of the column boxes; either with a
“Global”
value, distributed equally throughout
the bands or with a value resulting from the choice of a normalized
“STC”
or
“NC”
curve, for
isolation and for immision respectively. Or even manually, you can edit he desired value.
