Casella 620 Series - Page 31

620 Series
31
Casella CEL-620 with CEL-251 Microphone Free Field response with and without Wind Screen.
Nominal
Frequency
Actual
Frequency
0 Degree
Free Field
Response
0 Degree
Free Field
Corrections
Effect of
Wind
Screen
0 Degree
Free Field
Response
with wind
Screen
0 Degree
Free Field
Corrections
with Wind
Screen
Expanded
uncertainty
of
Corrections
(k=2)
Hz
Hz
dB
dB
dB
dB
dB
dB
250
251.19
0.0
0.0
0.0
0.0
0.0
0.16
315
316.23
-0.1
0.1
0.0
-0.1
0.1
0.16
400
398.11
0.1
-0.1
0.0
0.1
-0.1
0.16
500
501.19
0.1
-0.1
0.0
0.1
-0.1
0.16
630
630.96
0.0
0.0
0.1
0.1
-0.1
0.17
800
794.33
0.1
-0.1
0.1
0.2
-0.2
0.18
1000
1000.00
-0.1
0.1
0.1
0.0
0.0
0.19
1250
1258.92
0.0
0.0
0.2
0.2
-0.2
0.19
1600
1584.89
-0.4
0.4
0.3
-0.1
0.1
0.20
2000
1995.26
-0.2
0.2
0.4
0.2
-0.2
0.21
2240
2238.72
0.1
-0.1
0.4
0.5
-0.5
0.21
2500
2511.88
0.4
-0.4
0.5
0.9
-0.9
0.21
2800
2818.38
0.2
-0.2
0.5
0.7
-0.7
0.22
3150
3162.27
-0.3
0.3
0.6
0.3
-0.3
0.22
3550
3548.13
-0.9
0.9
0.7
-0.2
0.2
0.23
4000
3981.07
0.0
0.0
0.7
0.7
-0.7
0.23
4500
4466.83
0.0
0.0
0.7
0.7
-0.7
0.25
5000
5011.86
-0.1
0.1
0.6
0.5
-0.5
0.26
5600
5623.40
-0.4
0.4
0.5
0.1
-0.1
0.28
6300
6309.56
-0.7
0.7
0.2
-0.5
0.5
0.29
7100
7079.45
-0.1
0.1
-0.1
-0.2
0.2
0.32
8000
7943.27
-0.3
0.3
-0.3
-0.6
0.6
0.35
8500
8413.94
-0.4
0.4
-0.4
-0.8
0.8
0.38
9000
8912.49
-0.6
0.6
-0.5
-1.1
1.1
0.41
9500
9440.59
-0.8
0.8
-0.5
-1.3
1.3
0.44
10000
9999.98
-0.9
0.9
-0.7
-1.6
1.6
0.46
10600
10592.52
-0.8
0.8
-0.7
-1.5
1.5
0.48
11200
11220.16
-0.6
0.6
-0.9
-1.5
1.5
0.50
11800
11885.00
-1.0
1.0
-1.0
-2.0
2.0
0.52
12500
12589.23
-0.7
0.7
-1.2
-1.9
1.9
0.53
13200
13335.19
-1.0
1.0
-1.3
-2.3
2.3
0.55
14000
14125.35
-0.9
0.9
-1.4
-2.3
2.3
0.57
15000
14962.33
-1.0
1.0
-1.5
-2.5
2.5
0.59
16000
15848.90
-0.9
0.9
-1.9
-2.8
2.8
0.60
17000
16788.00
-1.0
1.0
-2.1
-3.1
3.1
0.60
18000
17782.76
-1.0
1.0
-2.4
-3.4
3.4
0.60
19000
18836.45
-1.0
1.0
-2.7
-3.7
3.7
0.60
20000
19952.58
-1.3
1.3
-2.6
-3.9
3.9
0.60
Corrections below 250Hz are 0.0dB.