Bosch Plena Voice Alarm System Installation And Operation Manual page 151

Plena Voice Alarm System
Clause / Requirement
13.12.1 Output power
The VACIE output power shall be as declared by
the manufacturer.
13.12.2 Signal-to-noise ratio
The VACIE shall have an A-weighted signal-to-
noise ratio of at least 45 dB (see IEC 60268-1).
13.12.3 Frequency response
The frequency response of the VACIE shall fit
within the non-shaded area in Figure 1 for sound
sources without microphone(s) (e.g. message
store) and Figure 2 for sound sources with
microphone(s).
Figure 1.2 VACIE frequency response limits
without microphone(s)
Key
1
2
Bosch Security Systems B.V.
20
15
10
1
1 0,125 0,4
0
4,0
-1 1,0
-10
-15
-20
relative output signal level, with reference to
0 dB signal level measured at 1 kHz (dB)
1/3 octave frequency band (Hz)
Installation and Operation manual
Compliance
The output power of the amplifier
elements of the Plena Voice Alarm
System (Power Amplifiers, Basic
Amplifiers) are specified in the data
sheets and in the IUI.
The A-weighted signal-to-noise ratio of
the Plena Voice Alarm System amplifiers
(Power Amplifiers and Basic Amplifiers)
is specified in the data sheets and in the
IUI. The signal-to-noise ratio is above 75
dB. The complete signal chain from
microphone to loudspeaker is compliant
to this clause.
The frequency response of all Plena Voice
Alarm System sound paths that do not
include microphones is within the
specified limits of this clause.
2
8,0 20
Signature
9922 141 1037x (V2.16) | V0.6 | 2011.09
| en 151