Larson Davis CAL291, Technical Reference Manual

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3-2 Microphone Placement
CAL291 Refernce Manual
Microphone Placement
In most cases this CAL291 will be used with a dual channel
sound intensity probe, although it can also be used with two
separate microphones mounted on the microphone
preamplifiers.
• If using a sound intensity probe, separate the two
microphones as described in the operating manual for the
probe, remove the space, and spread the microphones far
enough apart that they can be placed over the
microphone port block. Do not remove the microphone
grid caps. Slide them firmly into the two ports as shown
in Figure 3-1.
FIGURE 3-1 Microphone In Place Inside
Microphone Ports of CAL291
• If using separate microphones, insert each firmly into the
microphone ports. It may be necessary to place support
beneath the preamplifiers so that they are aligned parallel
to the center line of the microphone port openings.