Bosch Plena Voice Alarm System Installation And Operation Manual page 152

152 en |
Clause / Requirement
Figure 1.3 VACIE frequency response limits
with microphone(s)
Key
1
2
NOTE - The frequency response limits exclude
loudspeakers.
NOTE - A bandwidth of 400 Hz to 4 kHz is
sufficient to achieve acceptable intelligibility in
some acoustic environments. However, a higher
frequency limit may be necessary to achieve
acceptable intelligibility in more difficult acoustic
environments due, for example, to the masking
effect caused by reverberation and/or ambient
noise.
13.13 Message store(s)
Pre-recorded messages shall be stored in non-
volatile memory that retains the messages when
all power sources are removed.
NOTE - The use of tapes or magnetic or optical
data disks for the storage of emergency
messages is not acceptable at the time of
drafting this European Standard (see Annex C)
13.14 Redundant power amplifiers
(option with requirements)
9922 141 1037x (V2.16) | V0.6 | 2011.09
20
15
10
5
1 0,5 0,63 1,25
0
0,2 0,8
1,6
1,0
-5
-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 frequency response of all Plena Voice
Alarm System sound paths that include
microphones is within the specified
limits of this clause.
2
4,0 10
Plena Voice Alarm System is compliant.
The pre-recorded messages of the Plena
Voice Alarm System are digitally stored
on a Flash memory in uncompressed
format (linear PCM, 16-bit, 44.1kHz). This
card retains the messages when all
power sources are removed.
Plena Voice Alarm System is compliant.
Plena Voice Alarm System
Signature
Bosch Security Systems B.V.