Noise Criterion Curves - Mitsubishi Electric PKA-M60KAL Service Manual

5

NOISE CRITERION CURVES

5-1. SOUND LEVELS
Measurement location
Note: Measured in anechoic room.
5-2. NOISE CRITERION CURVES
PKA-M60KA.TH
PKA-M60KAL.TH
PKA-M71KA.TH
PKA-M71KAL.TH
External static pressure : 0Pa
Power source : 220, 230, 240V, 50Hz
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
Approximate minimum
audible limit on
15.0
continuous noise
10.0
63 125 250
Octave band center frequencies (Hz)
OCH661
1.0 m
High
Low
500 1k 2k 4k 8k
Models
PKA-M60/71KA(L)
PKA-M100KA(L)
PKA-M100KA.TH
PKA-M100KAL.TH
70.0
65.0
60.0
NC-60
55.0
50.0
NC-50
45.0
40.0
NC-40
35.0
30.0
NC-30
25.0
20.0
Approximate minimum
audible limit on
NC-20 15.0
continuous noise
10.0
63 125
11
Sound level at anechoic room : Low-Middle-High
Sound level dB (A)
39 - 42 - 45
41 - 45 - 49
External static pressure : 0Pa
Power source : 220, 230, 240V, 50Hz
High
Low
250 500 1k 2k
Octave band center frequencies (Hz)
NC-60
NC-50
NC-40
NC-30
NC-20
4k 8k