Larson Davis Spartan 821, Reference Manual

Page: 91 / 129

Spartan 821/721 Manual IEC 61672-1 Section 9.3 B-2
TABLE B.1
821 with PRM821/377B02 Average Frequency Responses and Corrections,
Required by IEC 61672-1
Exact
Frequency
0° Free
Field
Response
0° Free-
Field
Corrections
1
Effect of
Wind
Screen
0° Free
Field
821 with
Wind
Screen
0° Free-
Field
Corrections
821 with
Wind
Screen¹
Expanded
uncertainty
of
Corrections
@ 95%
Hz dB dB dB dB dB dB
63 0.18 -0.18 -0.06 0.12 -0.12 0.25
79 0.18 -0.18 -0.06 0.12 -0.12 0.25
100 0.18 -0.18 -0.06 0.12 -0.12 0.25
126 0.18 -0.18 -0.06 0.12 -0.12 0.25
159 0.18 -0.18 -0.06 0.12 -0.12 0.25
200 0.18 -0.18 -0.06 0.12 -0.12 0.25
251 0.18 -0.18 -0.05 -0.01 0.01 0.25
316 0.18 -0.17 -0.02 0.02 -0.02 0.25
398 0.22 -0.22 -0.05 0.04 -0.04 0.25
501 0.24 -0.24 0.05 0.19 -0.19 0.25
631 0.28 -0.28 0.02 0.22 -0.22 0.25
794 0.11 -0.11 0.11 0.18 -0.18 0.25
1000 0.00 0.00 0.14 0.14 -0.14 0.25
1059 -0.08 0.08 0.19 0.11 -0.11 0.25
1122 -0.19 0.19 0.24 0.04 -0.04 0.25
1189 -0.20 0.20 0.17 -0.03 0.03 0.25
1259 -0.17 0.17 0.22 0.05 -0.05 0.25
1334 -0.34 0.34 0.32 -0.02 0.02 0.25
1413 -0.24 0.24 0.24 0.01 -0.01 0.25
1496 -0.30 0.30 0.34 0.03 -0.03 0.25
1585 -0.08 0.08 0.42 0.34 -0.34 0.25
1679 -0.15 0.15 0.44 0.28 -0.28 0.25
1778 0.14 -0.14 0.50 0.64 -0.64 0.25
1884 0.17 -0.17 0.49 0.65 -0.65 0.25