Bosch IRIS-Net User Manual page 405

IRIS-Net
PEQ
6dB/Oct
30 / 110 /
370 /
1300 / 4600 / kHz
16000 Hz
0.7
0 dB
first
Editing filters via Mouse Dragging in the Graphic Display
If a filter has been activated (BYPASS is not engaged), a white dot in the frequency response graph represents the
selected filter. Click onto this dot with the left mouse button and keep the button pressed down to change the
corresponding filters frequency by dragging the mouse to the left or right. Moving the mouse up or down lets you set
the filters gain (depending on the type of filter).
Bosch Security Systems B.V.
PEQ. TYPE defines the filter type.
Loshelv. – PEQ is a parametric Peak Dip Filter with its frequency, quality (Q)
Hishelv, and gain being programmable.
Hipass, – Loshelv / Hishelv create a Low-Shelving or High-Shelving filter with
Lopass, the parameters being: frequency, slope and gain.
All- pass – Lopass / Hipass creates a Low Pass or High Pass filter with
adjustable frequency and slope.
– Allpass is a filter that has no influence on the frequency response
but on the phase response in the transmission function.
6dB/Oct, SLOPE defines the steepness or the filters order for Low-Shelving or
12dB/Oct High-Shelving filters as well as for Lo-Pass or Hi-Pass filters. Setting
different slopes in the transmission range is possible. High-Pass filter
and Q parameter together provide the possibility to program B6
alignments, which describes the raising in the cut-off frequency range.
20 Hz...20 FREQ (frequency) sets the center frequency for parametric EQs or, in
case of Shelving and High-Pass /
Lo-Pass filters, it sets the cut-off frequency.
0.4...40.0 Q sets the quality or the bandwidth of the parametric EQ. A high Q-
value results in a narrowband filter.
(PEQ), A low Q-value results in a wideband filter. Q also sets the quality and
therefore the curve progression of
0.4...2.0 Lo-Pass-, High-Pass- and All-Pass filters with 12dB/Oct slope.
(Hi-/
Lopass),
0.4...2.0
(All-
pass)
-18...+12 GAIN sets amplification (rising) or attenuation (lowering) of parametric
dB EQs or Low-Shelving- and High-Shelving filters.
first, ORDER (All-Pass filters only) sets the desired order of an All-Pass filter.
second A 1st order All-Pass filter shifts the phase by 180°. A 2nd order All-Pass
filter shifts the phase by 360°.
BYPASS activates (not engaged) or deactivates (engaged) the
corresponding filter, which allows for quick A / B comparison between
filtered and original sound signal.
User Manual
DIGITAL MATRIX | en 405
2017.05 | 3.20 | F.01U.119.956