Sound Levels - intensity MDV-D28Q4/N1-D Service Manual

MAN-S-4WC-1112

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)
Model
MDV-D28Q4/N1-D
MDV-D36Q4/N1-D
MDV-D45Q4/N1-D
MDV-D56Q4/N1-D
MDV-D71Q4/N1-D
MDV-D80Q4/N1-D
MDV-D90Q4/N1-D
MDV-D100Q4/N1-D
MDV-D112Q4/N1-D
MDV-D140Q4/N1-D
9.3 Octave Band Level
Audibility limits of
continuous white
sound
Octave band center frequency （ Hz ）
21
4.59ft
Noise level under three speeds of fan (dB(A))
H
42
42
42
42
45
45
48
48
48
50
MDV-D28(36,45,56) Q4/N1-DMDV-D71(80) Q4/N1-D
M
38
38
38
38
42
42
45
45
45
47
Audibility limits of
continuous white
sound
Octave band center frequency （ Hz ）
Four-way Cassette Type
L
35
35
35
35
39
39
43
43
43
44