717
S ound L evels
Y K HC -D -2007-01
9. S ound L evels
1.0m
F OUR -W A Y C A S S E T T E T Y P E
Mic rophone
High s peed airflow
Medium s peed airflow
Low s peed airflow
18000btu/h
24000btu/h
36000btu/h
48000btu/h
Octave band center frequency
£¨
Hz
£©
Sound
pressure
level
dB
£
¨
0
d
B
=
0
.0
0
0
2
|Ì
bar
£©
A udibility limits of
continuous white
sound
Octave band center frequency
£¨
Hz
£©
Sound
pressure
level
dB
£
¨
0
d
B
=
0
.0
0
0
2
|Ì
bar
£
©
A udibility limits of
continuous white
sound
Nois e level under three s peeds of fa n
Model
H
M
L
Y K K C -
18
D
43
41
38
Y K K C - 24
D
43
41
38
Y K K C - 36
D
46
44
41
Y K K C -
48
D
46
44
41
