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9. Sound Levels
9.1 Test condition
Note:
1, during actual operation, these values are normally somewhat higher as a result of ambient conditions.
2, Anechoic chamber conversion value, measured at a point 3.28ft(1m) in front of theunit at a height of 4.59ft(1.4m)
9.2 Test data (Sound Pressure Levels)
Noise level under three speeds of fan (dB(A))
9.3 Octave Band Level
MDV-D28(36,45,56) Q4/N1-DMDV-D71(80) Q4/N1-D
Octave band center frequency(Hz)
Sound pressure level dB(0dB=0.0002μ bar)
Audibility limits of
continuous white
sound
Octave band center frequency(Hz)
Sound pressure level dB(0dB=0.0002μ bar)
Audibility limits of
continuous white
sound
MAN-S-4WC-1112 Four-way Cassette Type