AKG CK 55 User Instructions page 12

Note: The smaller the distance be-
tween the microphone and the
sound source, the higher the usable
gain before feedback.
Fig. 4:
Microphone
pickup angle.
12
3. Ask the user not to turn their head
more than 30 degrees to the left or
right while talking. (Refer to fig. 4.)
Talking outside the pickup angle of
the microphone will reduce the
microphone's output level consider-
ably.
4 Cleaning
To clean the microphone case, use a
soft cloth moistened with water.