Section
4
Operation
24
4.7
Loudmouth
™
Options
Certain Loudmouth
™
options affect operation as follows:
Pre-Announce Tone
With this feature enabled the Loudmouth
™
will sound a short tone prior to each broadcast to notify listeners that
a page is forthcoming.
One Speaker / Two Speakers
Set the Loudmouth
™
for one or two speaker operation to set the correct audio output level from the audio
amplifier.
4.8
How to Minimize Feedback
Feedback is the result of the Loudmouth
™
speaker audio getting back into the microphone of the radio being used
to access the Loudmouth
™
. This is a problem with the calling radio, not the Loudmouth
™
receiver. Although the
Loudmouth
™
is not intended to be used in the same area as the calling radio, steps can be taken to minimize the
feedback effect.
Reduce Loudmouth
™
speaker volume
Do not set the Loudmouth
™
volume any high than is necessary to cover the intended area.
Use multiple speakers
The use of multiple speakers means you don’t have to cover as large an area with each speaker, consequently,
speaker volume can be reduced.
Maintain distance between the calling radio and the Loudmouth
™
speaker
In general, the calling radio should be at least 50 feet away from the speaker when the Loudmouth
™
is set for
50% volume. The necessary distance increases if the volume is turned up and decreases if the volume is
turned down.
Make sure the radio microphone is turned away from the speaker
You do not want the speaker pointing directly into the microphone. Using your hand to shield the microphone
can also reduce feedback.
Use a noise canceling microphone
Equip your calling radio with an optional noise-canceling microphone.
Record and Play feature eliminates feedback
The Record and Play feature completely eliminates feedback by recording your
message and playing it back immediately after you have finished sending it to the
Loudmouth
™
receiver. See page 18 to enable the Record and Play operation.
The calling radio is not transmitting while the message is broadcast, so speaker
audio cannot get into the calling radio microphone.
Summary of Contents for JBS-446D
Page 2: ......
