48
Audio
Selecting a Microphone
Choosing a microphone type (condenser, canon, Lavaliere, and so on), pickup pattern
(cardioid, omni-directional, and so on), sensitivity, whether one needs phantom power, and
other considerations, are beyond the scope of these installation instructions. Unlike camera
domes, you can mix different models of microphone at a site. Please see your microphone
supplier.
Placing a Microphone
Microphone placement requires experience with noise sources, sound absorption and
reflections; these topics are beyond the scope of these instructions. Please see your
microphone supplier. See also
Checking For Audio Interference
.
Speakers
Connect powered speakers to AUDIO OUT connector on a Multi-Media DVR so that people
at the site can hear an operator (see
TIP!
Place speakers away from microphones, to avoid audio feedback.
Figure 4-2
Connecting Speakers
Caution
Use the AUDIO IN connector. The NOT USED connector is disabled.
Checking For Audio Interference
Checking one’s installation for hard-to-predict situations includes spot-checking for:
Live audio
Coordinate the testing of audio with fire alarm and security alarm testing. Using
View, connect to that Multi-Media DVR and check audio for feedback and interference,
before and during alarms.
VOLU ME
V O LU ME
Stereo
mini-plug
Area 2
Area 1
Powered
speaker
Channel 1 /
LEFT
Powered
speaker
Channel 2 /
RIGHT
Summary of Contents for Rapid Eye
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