1 - 114
PMFY
5. SOUND LEVELS
YKB/YLM 2nd
MEE15K022
5. SOUND LEVELS
5-1. Sound levels
5-2. NC curves
PMFY-P-VBM-E
Sound level at anechoic room : Low-Middle2-Middle1-High
Sound level dB (A)
PMFY-P20VBM-E
27-30-33-35
PMFY-P25VBM-E
32-34-36-37
PMFY-P32VBM-E
PMFY-P40VBM-E
33-35-37-39
* Measured in anechoic room
1.5m
Measurement location
PMFY-P20VBM-E
External static pressure : 0Pa
Power source :
220, 230, 240V, 50Hz / 220V, 60Hz
PMFY-P25, 32VBM-E
External static pressure : 0Pa
Power source :
220, 230, 240V, 50Hz / 220V
, 60Hz
PMFY-P40VBM-E
External static pressure : 0Pa
Power source :
220, 230, 240V, 50Hz / 220V, 60Hz
NC60
NC50
NC40
NC30
NC20
Approximate minimum
audible limit on
continuous noise
70
60
50
40
30
20
63
125
250
500
1000
2000
4000
8000
10
0
OCT
A
VE BAND PRESSURE LEVEL
(dB) 0dB = 20μPa
OCTAVE BAND CENTER FREQUENCIES (Hz)
High speed
Low speed
Middle1 speed
Middle2 speed
High speed
Low speed
Middle1 speed
Middle2 speed
NC60
NC50
NC40
NC30
NC20
Approximate minimum
audible limit on
continuous noise
70
60
50
40
30
20
63
125
250
500
1000
2000
4000
8000
10
0
OCT
A
VE BAND PRESSURE LEVEL
(dB) 0dB = 20μPa
OCTAVE BAND CENTER FREQUENCIES (Hz)
High speed
Low speed
Middle1 speed
Middle2 speed
NC60
NC50
NC40
NC30
NC20
Approximate minimum
audible limit on
continuous noise
70
60
50
40
30
20
63
125
250
500
1000
2000
4000
8000
10
0
OCT
A
VE BAND PRESSURE LEVEL
(dB) 0dB = 20μPa
OCTAVE BAND CENTER FREQUENCIES (Hz)
