Noise Criterion Curves - Mitsubishi Electric City Multi PLFY-P08NCMU-E Technical & Service Manual

4-2. NOISE CRITERION CURVES

PLFY-P08NCMU-E.TH
PLFY-P08NCMU-E
PLFY-P08NCMU-ER2.TH
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PLFY-P15NCMU-E.TH
PLFY-P15NCMU-E
PLFY-P15NCMU-ER2.TH
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB)
.TH
High 38
1
Medium
32
Low 29
500 1000 2000 4000
NOTCH SPL(dB)
High 40
.TH
1
Medium
35
Low 31
500 1000 2000 4000
PLFY-P12NCMU-E.TH
LINE
PLFY-P12NCMU-E
PLFY-P12NCMU-ER2.TH
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
8000 63
LINE
CEILING
NC-70
NC-60
NC-50
NC-40
NC-30
NOTE: The sound level is measured in an anechoic
room where echoes are few, when compres-
NC-20
sor stops. The sound may be bigger than the
indicated level in actual use due to surround-
8000
ing echoes. The sound level can be higher by
about 2 dB than the indicated level during cool-
ing and heating operation.
7
NOTCH
High
.TH
1
Medium
Low
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
5ft
MICROPHONE
SPL(dB) LINE
39
34
30
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000
UNIT