Soundfield MKV, User Manual

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SoundField MKV Issue 1.1 User Guide
Test 1 To speech check, start at the front of the microphone at about 150mm (6 inches)
range and progress clockwise around horizontally, noting the signal peaks at 0° and
180° and the nulls at 90° and 270°.
Similar nulls should also be found immediately over the top and underneath
the microphone (see Figure 1 - Page 12)
Test 2 Aim the microphone 90° to the right by rotating the azimuth control 90° clockwise - (see
Figure 2 - Page 12 )The signal peaks and null will have moved round 90° relative to the
label.
Test 3 Repeat the test with 90° rotation anti-clockwise and results should be as Test 2.
Test 4 Repeat the test with 180° rotation and results should be as Test 1.
Test 5 Return the controls to forward facing, as in Test 1 and select 45° clockwise on the azimuth
control. The peaks and nulls will now have moved 45° to the right of microphone front (ie
halfway between Figures 1 and 2).
Test 6 Repeat Test 5 with the azimuth control selected to 45° anticlockwise. The peaks and nulls
will now be 45° to the left of microphone front. (Again, halfway between figures 1 and 2 but
at 90° to Test 5).
Test 7 Return the azimuth to 0° and turn elevation to +45°. The peaks should now be at +45°
relative to microphone front and -45° relative to microphone back as in Figure 3.
Test 8 Repeat Test 7 at -45° and note that the peaks move to this position relative to
microphone front and 45° relative to microphone back as in Figure 4.
Test 9 Return the elevation control to 0° and whilst speaking at the microphone front, note
that increasing dominance increases the microphone sensitivity and reducing
dominance reduces the sensitivity.
Test 10 Return the dominance control to 0° Move the polar pattern control and observe that the
microphone works as a single cardioid with a null at 180° (microphone back) in
cardioid position and all around equally in omni position.
Test 11 With the microphone set as a cardioid check that the dominance has a similar effect as
Test 10. Return the dominance control to 0° and de-select SF IN.
Test 12 Set the stereo controls to cardioid and 90° and observe that the left signal peaks when
speaking at 45° microphone left (to your right) and the right one at 45° microphone right
(to your left) with corresponding opposite nulls.
Conclusions
If all the above tests have produced the results described, then the system can be assumed to be
working correctly.