Mitsubishi Electric PUMY-P36NKMU3 Technical & Service Manual page 31

4-6. NOISE CRITERION CURVES
PUMY-P36NKMU3
PUMY-P36NKMU3-BS
PUMY-HP36NKMU1
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PUMY-P60NKMU3
PUMY-P60NKMU3-BS
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
BAND CENTER FREQUENCIES, Hz
OCH733
SPL(dB)
MODE LINE
COOLING 49
HEATING 53
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
SPL(dB)
MODE LINE
COOLING 58
HEATING 59
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
250 500 1000 2000 4000 8000
PUMY-P48NKMU3
PUMY-P48NKMU3-BS
PUMY-HP48NKMU1
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
MICROPHONE
1.5 m
[4.9 ft]
31
SPL(dB)
MODE
COOLING 51
HEATING 54
125 250 500 1000 2000 4000 8000
BAND CENTER FREQUENCIES, Hz
1 m
UNIT
[3.3 ft]
GROUND
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20