York YHKMXH009BARX-FX Service Manual page 32

7. Sound Pressure Level
(3)
Test method
According to the testing illustrator, the microphones wearing sponge style cover should be
placed in the right position
1) Testing illustrate:
2) Testing condition:
a: Unit running in the normal condition
b: Test in the semi-anechoic chamber
c: Noise level varies from the actual factors
such as room structure, etc.
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