Mitsubishi Electric CITY MULTI PLFY Series Technical & Service Manual page 6

3-4. NOISE CRITERION CURVES
TPLFYW04FM1W0A
FAN SPL(dB)
High 27
Medium 26
25
Low
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
TPLFYW12FM1W0A
SPL(dB)
FAN
High 41
Medium 33
27
Low
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
TCH123
TPLFYW06FM1W0A
LINE
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
Approximate minimum
audible limit on
NC-20
continuous noise
10
63 125 250
4000 8000
BAND CENTER FREQUENCIES, Hz
TPLFYW15FM1W0A
LINE
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20
Approximate minimum
audible limit on
NC-20
continuous noise
10
63 125 250
4000 8000
BAND CENTER FREQUENCIES, Hz
FAN SPL(dB) LINE
High 31
Medium 29
27
Low
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
SPL(dB)
FAN LINE
High 43
Medium 40
Low 27
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
6
TPLFYW08FM1W0A
SPL(dB)
FAN
High 34
Medium 30
Low 27
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250 500 1000 2000 4000
BAND CENTER FREQUENCIES, Hz
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
8000