LESSON 5
DEFINE AUDIO MAINTENANCE PROCEDURES FOR MICROPHONES AND CABLES
TASK
Describe the audio maintenance procedures necessary to ensure proper care
and handling of audio equipment (microphone and cables).
CONDITIONS
Given information, illustrations, procedures and terms for the proper care
and handling of audio equipment (microphones and cables).
STANDARDS
Demonstrate competency of the task skills and knowledges by responding to
the multiple-choice test covering terms, use and the proper care and
handling of audio equipment (microphones and cables).
REFERENCES
None
Learning Event 1:
DESCRIBE THE PROPER CARE AND HANDLING OF MICROPHONES
1.
The microphone is perhaps one of the most delicate pieces of equipment
associated with the broadcasting system. And if the proper care is taken,
the microphone will last a long time. One major step in prolonging the life
of a microphone is always store the microphone in a fairly strong box lined
with foam rubber to absorb any shock the box may receive. Also, try to keep
some type of felt material wrapped around the microphone.
These two
precautions will help greatly to keep your microphones working properly.
2.
If the response from the microphone is zero when it is connected to an
amplifier known to be good, several problem possibilities exist. Either the
"hot" lead is open (if the ground side were open, noise would result), a
short exists, or the internal element of the microphone is defective. The
first place to check for a defect is in the plug. This is the point where
the cable leaves the microphone housing.
a. Figure 5-1 shows a typical low-impedance microphone circuit in which
a three-conductor cable is used. In this case, an open in either the No. 1
or No. 2 wire will cause weak or distorted sound. A break in the shielding
results in a higher noise level (buzz).
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