Ritron JBS-446D, Руководство пользователя

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5 Section 1 Getting Started
1.5
Determine the volume setting
Selecting the correct volume level is critical to the performance of the Loudmouth
™
receiver and PA speaker.
Carefully consider the following before deciding on the appropriate volume setting. Refer to the Programming
section of this manual for specific instructions on programming the Volume Level.
Ambient (average) noise level should be considered first when selecting the
volume level.
Increasing the volume level in an effort to cover a wider area will result in:
•
Undesirably high volume when near the speaker.
•
Low volume at the outer edges of the coverage area.
•
A calling radio must be a greater distance from the Loudmouth
™
speaker to prevent feedback.
(Feedback is the result of Loudmouth
™
speaker audio getting into the calling radio’s microphone.)
When coverage of a large area is required, additional Loudmouth
™
speakers may be necessary for
satisfactory performance. See the Installation section of this manual for details on how to install 2 speakers
using a single Loudmouth
™
receiver, or multiple receivers and speakers.
1. Refer to the horizontal shaded bars on the chart below to
determine the sound level that best represents your
location. This should be the ambient, or average sound
level. We will consider the maximum sound level when
we locate the speaker.
2. Estimate the maximum distance (in feet) that the
loudspeaker must be heard. Locate that distance on the
chart below and follow it up to find the line that is in the
middle of your shaded bar. This line indicates the
optimum Loudmouth
™
volume level setting.
Loudmouth Volume
Rock Music
Subway Train
Industrial Factory
Warehouse
Busy Restaurant
Large Office
Hospital
Doctors Office
0 10 20 30 40 50 60 70 80 90 100
Distance (Feet)
120
110
100
90
80
70
60
50
40
SPL
(dB)
10%
25%
50%
75%
100%
EXAMPLE: In the Ritron factory we
need to cover a maximum distance of 50
feet on the factory floor with an ambient
sound level similar to a warehouse. I
find the vertical line at the bottom of the
chart indicating 50 feet, and follow it up
to the shaded bar indicating Warehouse.
The 50% and 75% lines are in the middle
of the Warehouse bar, indicating a
required Loudmouth
™
volume setting
between 50 - 75%.