Larson Davis System 824, Technical Reference Manual

Page: 632 / 673

F-2 824 Reference Manual 9/29/09
Average Frequency Response
Corrections
The following table presents the corrections for the average
frequency response of the System 824 using a PRM902
preamplifier and a Model 377B41 free-field microphone,
with and without a windscreen. This data include the effects
of reflections and diffraction.
Frequency, Hz
0
°
Free Field
Response
dB
0
°
Free Field
Correctons
1
dB
Effect of
Windscreen
dB
Windscreen on
824,
0
°
Free Field
dB
0
°
Free Field
Corrections
with Wind
Screen on 824
dB
1
Expanded
uncertainty
of
Corrections
@95% dB
251.19 0.0 0.0 0.0 0.0 0.0 0.25
316.23 0.0 0.0 0.0 0.0 0.0 0.25
398.11 0.0 0.0 0.0 0.0 0.0 0.25
501.19 0.0 0.0 0.0 0.0 0.0 0.25
630.96 0.0 0.0 0.0 0.0 0.0 0.25
794.33 0.0 0.0 0.0 0.0 0.0 0.25
1000.00 0.0 0.0 0.0 0.0 0.0 0.25
1059.25 0.0 0.0 0.0 0.0 0.0 0.25
1122.02 0.1 -0.1 0.1 0.1 -0.1 0.25
1188.50 0.1 -0.1 0.0 0.1 -0.1 0.25
1258,93 0.1 -0.1 0.0 0.1 -0.1 0.25
1333.52 0.2 -0.2 0.1 0.3 -0.3 0.25
1412.54 0.2 -0.2 0.1 0.3 -0.3 0.25
1496.24 0.2 -0.2 0.1 0.3 -0.3 0.25
1584.89 0.2 -0.2 0.2 0.3 -0.3 0.25
1678.80 0.2 -0.2 0.1 0.3 -0.3 0.25
1778.28 -0.2 0.2 0.2 0.0 0.0 0.25
1883.65 -0.2 0.2 0.2 0.1 -0.0 0.25
1995.26 -0.3 0.3 0.2 -0.1 0.1 0.30
2113.49 0.1 -0.1 0.3 0.3 -0.3 0.30
2238.72 0.1 -0.1 0.3 0.4 -0.4 0.30
2371.37 0.3 -0.3 0.3 0.6 -0.6 0.30
2511.89 0.2 -0.2 0.3 0.5 -0.5 0.30
2660.73 0.2 -0.2 0.3 0.5 -0.5 0.30
2818.38 0.1 -0.1 0.3 0.4 -0.4 0.30
2985.38 0.1 -0.1 0.3 0.4 -0.4 0.30
3162.28 -0.1 0.1 0.2 0.1 -0.1 0.30
3349.65 -0.1 0.1 0.1 0.0 0.0 0.30
3548.13 0.1 -0.1 0.0 0.1 -0.1 0.30
3758.37 0.4 -0.4 -0.1 0.3 -0.3 0.30
3981.07 0.2 -0.2 -0.2 0.0 0.0 0.35
4216.97 0.0 0.0 -0.2 -0.2 0.2 0.35
4466.84 0.1 -0.1 -0.3 -0.2 0.2 0.35
4731.51 0.0 0.0 -0.3 -0.3 0.3 0.35
5011.87 0.4 -0.4 -0.2 0.2 -0.2 0.35
5308.84 0.1 -0.1 -0.2 -0.1 -.1 0.35
5623.41 0.0 0.0 -0.1 -0.1 0.1 0.35
5956.62 -0.1 0.1 -0.1 -0.2 0.2 0.35
6309.57 0.3 -0.3 0.0 0.3 -0.3 0.35