GOLDBERG AND MÄKIVIRTA
OPTIMISED EQUALISATION COMPARISON
AES 116TH CONVENTION, BERLIN, GERMANY, 2004 MAY 8-11
11
APPENDIX C – GRAPHIC EQUALISER CASE STUDY, STATISTICAL GRAPHS
Magnitude Frequency Response - Finland, Gen Auditorium, 1036A, Left
Frequency [Hz]
10
100
1,000
10,000
P
res
. [
P
a
] /
[v
o
lts
],
dB
25
20
15
10
5
0
-5
-10
Figure 5. Unequalised in-situ acoustic measurement with smoothed and unsmoothed data.
Table 2. Graphic equaliser settings.
Centre
Frequency,
Hz Gain,
dB
Centre
Frequency,
Hz Gain,
dB
Centre
Frequency,
Hz Gain,
dB
Centre
Frequency,
Hz Gain,
dB
20
-1.6
200
-0.7
2,000
0.0
20,000
0.0
25
-6.6
250
0.0
2,500
-0.1
32
-7.7
315
0.0
3,150
0.0
40
-1.4
400
0.0
4,000
0.0
50
-2.1
500
-0.2
5,000
0.0
63
-8.2
630
-1.3
6,300
0.0
80
-3.3
800
0.0
8,000
0.0
100
0.0
1,000
0.0
10,000
0.0
125
0.0
1,250
0.0
12,500
0.0
160
-0.9
1,600
0.0
16,000
0.0
Use of Graphic Equaliser - 1036AL
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
20
25
32
40
50
63
80
10
0
12
5
16
0
20
0
25
0
31
5
40
0
50
0
63
0
80
0
1k
1.
25
k
1.
6k
2k
2.
5k
3.
2k
4k
5k
6.
3k
8k
10
k
12
.5
k
16
k
20
k
1/3 Octave Frequency Band, Hz
Level, dB
Figure 6. Graphic equaliser settings.
