BRUEL & KJAER 1615 - Page 15

c
0
:...
0
::;)
c
$
<
c coooooo o oooaooo oooooooooooooooooooa ooooaoooooooono o ooo
- -
~ : ______ __ ~4 ~ k ~ H ~ z ---- ---~ ~a~ ·k ~ H~ ~ z ________ ~ 16 ~ ~ ~ H ~· z ~ __ ~ F ~ r ~ e
2
q ~ u ~ e;- ~ c ~ y ________ ____ ~_ , _·~_
0
_,_- ____ ~
Fig.2.8 Frequency response of several adjacent 1/1 octave filters
dB
c
0
0
10
"
c
..
~
15
20
270°
180°
goo
lag
c
oo
0
0
lead
"'
goo
Ql
"'
0
..c
180°
ll.
270°
1fJ
1
/s
1!s
1!3 octave
Frequency --
1 63 6
+
1
Fig.2.9 Phase response of Filter Set in 1/3 octave condition
11