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4-2. SOUND LEVEL
* Measured in anechoic room.
PLFY-P-NBMU-E
PLFY-P12NBMU-E
PLFY-P12NBMU-ER1
PLFY-P15NBMU-E
PLFY-P15NBMU-ER1
PLFY-P18NBMU-E
PLFY-P18NBMU-ER1
PLFY-P24NBMU-E
PLFY-P24NBMU-ER1
PLFY-P30NBMU-E
PLFY-P30NBMU-ER1
PLFY-P36NBMU-E
PLFY-P36NBMU-ER1
27-28-29-31
27-28-30-31
28-29-30-32
28-30-32-34
30-32-35-37
35-38-41-43
Sound level dB (A)
Sound level at anechoic room : Low-
Mid2-Mid1-High
5 ft (1.5m)
Measurement location
PLFY-P12NBMU-E
PLFY-P12NBMU-ER1
External static pressure : 0Pa
Power source : 208,230V, 60Hz Power source : 208,230V, 60Hz Power source : 208,230V, 60Hz
PLFY-P15NBMU-E
PLFY-P15NBMU-ER1
External static pressure : 0Pa
PLFY-P18NBMU-E
PLFY-P18NBMU-ER1
External static pressure : 0Pa
PLFY-P30NBMU-E
PLFY-P30NBMU-ER1
External static pressure : 0Pa
Power source : 208,230V, 60Hz
Power source : 208,230V, 60Hz Power source : 208,230V, 60Hz
PLFY-P24NBMU-E
PLFY-P24NBMU-ER1
External static pressure : 0Pa
PLFY-P36NBMU-E
PLFY-P36NBMU-ER1
External static pressure : 0Pa
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
Middle2 60Hz
High 60Hz
Low 60Hz
Middle1 60Hz
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
63 125 250 500 1k 2k 4k 8k
NC-60
NC-50
NC-40
NC-20
NC-30
Octave band pressure level (dB) 0dB=20Pa
Octave band center frequencies (Hz)
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
Approximate minimum
audible limit on
continuous noise
4-3. NC CURVES