AKG C 451B Bedienungshinweise Seite 15

The rod-shaped body, accurate response, and
many matching accessories from AKG make it
easy to use the microphone to pick up a wide
range of different instruments.
Read the following hints to get the best possible
results.
Owing to their acoustic principle, unidirectional
microphones exhibit what is called "proximity
effect". This means that the low-frequency content
of a sound signal will be progressively boosted as
the microphone is moved closer to the sound
source. Proximity effect begins to become audible
at a working distance of about 2 feet (60 cm).
Depending on the nature of the sound source,
proximity effect may be desirable or a nuisance.
Place the microphone closer to the sound source
to accentuate, or further away to reduce
proximity effect.
Feedback is the result of part of the sound pro-
jected by a speaker being picked up by a micro-
phone, fed to the amplifier, and projected again
by the speaker. Above a specific volume or
"system gain" setting called the feedback
3 Application
3.1 Introduction
3.2 Proximity
Effect
3.3 Feedback in
Live Sound
Situations
Fig. 3: Microphone
placement for
maximum gain
before feedback.
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