Sound Levels; Noise Levels(Vmm-E); Nc Curves(Vmm-E) - Mitsubishi Electric PEFY-P-VML-E Data Book

2. Sound Levels

2-1. Noise levels(VMM-E)

Ceiling concealed (VMM-E series)
Aux.duct
1m

2-2. NC curves(VMM-E)

1) Back inlet
PEFY-P20,25VMM-E
70
60
50
40
30
20
10
Approximate minimum
audible limit on
continuous noise
0
63 125
OCTAVE BAND CENTER FREQUENCIES (Hz)
PEFY-P20,25VMM-E (External static
70
60
50
40
30
20
10
Approximate minimum
audible limit on
continuous noise
0
63 125
OCTAVE BAND CENTER FREQUENCIES (Hz)
2m
Measurement location
(External static
pressure 30Pa)
High speed
Middle speed
Low speed
NC60
NC50
NC40
NC30
NC20
250 500 1000 2000 4000 8000
pressure 100Pa)
High speed
Middle speed
Low speed
NC60
NC50
NC40
NC30
NC20
250 500 1000 2000 4000 8000
Noise level at anechoic room (Low-Middle-High)
Model
Low
PEFY-P20VMM-E
23-28-31
PEFY-P25VMM-E
PEFY-P32VMM-E 26-30-33
PEFY-P40VMM-E 29-32-35
29-34-37
PEFY-P50VMM-E
PEFY-P63VMM-E 30-34-37
PEFY-P71VMM-E
31-34-37
PEFY-P80VMM-E
PEFY-P100VMM-E
40-44
PEFY-P125VMM-E 42-45
42-45
PEFY-P140VMM-E
❇ PEFY-P20~80VMM-E
Low : 30Pa Mid : 50Pa High : 100Pa
❇ PEFY-P100~140VMM-E
Low : 50Pa High : 130Pa
PEFY-P20,25VMM-E
70
60
50
40
30
20
10
Approximate minimum
audible limit on
continuous noise
0
63 125 250
OCTAVE BAND CENTER FREQUENCIES (Hz)
PEFY-P32VMM-E
70
60
50
40
30
20
10
Approximate minimum
audible limit on
continuous noise
0
63 125 250
OCTAVE BAND CENTER FREQUENCIES (Hz)
1- 28
Unit : dB(A)
External static pressure❇
Mid High
27-30-32 29-34-39
28-32-35 32-36-39
31-34-37 33-37-41
31-35-38 34-38-41
31-35-38 34-38-41
32-36-39 35-39-42
- 43-47
- 44-47
- 44-47
(External static
pressure 50Pa)
High speed
Middle speed
Low speed
NC60
NC50
NC40
NC30
NC20
500 1000 2000 4000 8000
(External static
pressure 30Pa)
High speed
Middle speed
Low speed
NC60
NC50
NC40
NC30
NC20
500 1000 2000 4000 8000