Section 1
Getting Started
5
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 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
Setting
Rock Music
Concert
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%.
