Bosch Plena Operating Manual page 182

182 en | Appendices
Clause / Requirement
1
VACIE frequency response limits with
microphone(s)
Key
1 relative output signal level, with
2 1/3 octave frequency band (Hz)
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)
2013.07 | V2.0 |
20
15
10
5
0,5 0,63 1,25
0
0,2
0,8 1,6
1,0
-5
-10
-15
-20
reference to 0 dB signal level
measured at 1 kHz (dB)
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
2
clause.
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
Signature
Bosch Security Systems B.V.