Mitsubishi Electric PLFY Series Technical & Service Manual page 9

PLFY-WL48NEMU-E.TH
90
80
70
60
50
40
30
20
Approximate minimum
audible limit on
continuous noise
10
63 125 250 500 1000
BAND CENTER FREQUENCIES, Hz
TCH124A
SPL(dB)
FAN LINE
High 46
Medium1 40
Medium2 37
Low 33
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
2000 4000 8000
9