SoundAdvisor Model 831C
B-5
FIGURE B-1
Windscreen Direction
EPS2116 Corrections
The following table and graph display correction factors for effects of the EPS2116 on the response of the sound
level meter. These are corrections are intended for laboratory use when testing to IEC 61672-3 to account for effects
of the EPS2116. See Table B.3 for the appropriate filter selection in the sound level meter for a given test as well as
the associated correction factor to be applied. Note that the correction factors are tabulated in Table B.4.
Table B.3 Test, Filter, and Correction Correlation
9440.61
-0.37
-0.40
-0.37
-0.50
-0.67
-0.70
-0.70
-0.83
-0.77
-0.90
-0.93 -0.77 -0.60
10000.00
-0.13
-0.20
-0.27
-0.43
-0.57
-0.57
-0.77
-0.83
-0.77
-0.90
-0.97 -0.90 -0.70
10592.54
-0.20
-0.20
-0.17
-0.40
-0.47
-0.47
-0.70
-0.83
-0.83
-0.83
-0.97 -0.87 -0.70
11220.18
-0.47
-0.43
-0.37
-0.43
-0.53
-0.47
-0.70
-0.90
-0.77
-0.80
-0.77 -0.90 -0.67
11885.02
-0.67
-0.73
-0.63
-0.60
-0.73
-0.57
-0.83
-0.90
-0.83
-0.87
-0.73 -0.70 -0.70
12589.25
-0.57
-0.73
-0.83
-0.87
-0.97
-0.97
-1.00
-1.00
-1.00
-1.17
-1.07 -0.90 -0.90
13335.21
-0.70
-0.67
-0.63
-0.83
-1.00
-1.17
-1.10
-1.07
-1.07
-1.37
-1.53 -1.20 -1.13
14125.38
-0.40
-0.50
-0.57
-0.60
-0.90
-1.00
-1.00
-1.20
-1.17
-1.37
-1.63 -1.47 -1.20
14962.36
-0.70
-0.73
-0.53
-0.73
-0.97
-0.90
-1.10
-1.33
-1.23
-1.50
-1.53 -1.43 -1.13
15848.93
-0.90
-0.90
-0.97
-1.03
-1.27
-1.13
-1.30
-1.60
-1.37
-1.57
-1.37 -1.40 -1.17
16788.04
-0.90
-1.07
-1.00
-1.30
-1.33
-1.47
-1.50
-1.53
-1.40
-1.70
-1.77 -1.43 -1.43
17782.79
-0.87
-0.93
-0.93
-1.10
-1.33
-1.53
-1.70
-1.57
-1.67
-1.73
-2.30 -2.00 -1.70
18836.49
-0.90
-1.10
-0.90
-1.10
-1.43
-1.43
-1.70
-1.83
-1.80
-1.83
-2.13 -2.27 -1.77
19952.62
-1.27
-1.30
-1.13
-1.47
-1.73
-1.67
-2.07
-2.30
-1.97
-2.23
-2.13 -1.97 -1.67
1. The corrections which should be subtracted from the measured data when using the Larson-Davis Model
WS001 3
½
-inch diameter windscreen with a
½
-inch Larson-Davis microphone are as indicated in the follow
-
ing table
Test
Sound Level Meter Filter
EPS 2116 Correction
(See Table A.2)
Free Field Response
FF:FF 2116
Free Field to Free Field EPS2116
Correction Factor
90 Degree Response
FF:90 2116
Free Field to 90 Degree EPS2116
Correction Factor
Table B.2 Directional Response of 3 ½-inch Windscreen
