Instruction Manual

Sound Level Meter Types 2245 – Instruction Manual Page 99 of 110
Table A.23 Sensitivity variations of the sound level meter with Windscreen
UA-1650, at sound incidence angles within ±Ɵ ° from the reference direction
Nominal
Frequency
Exact
Frequency
(6 digits)
Max Variation
± 30°
Max Variation
± 90°
Max Variation
± 150°
Hz Hz dB dB dB
250 251.189 0.08 0.18 0.22
315 316.228 0.43 0.43 0.51
400 398.107 0.44 0.44 0.47
500 501.187 0.05 0.19 0.28
630 630.957 0.37 0.47 0.70
800 794.328 0.23 0.36 0.48
1000 1000.00 0.12 0.25 0.48
1250 1258.93 0.07 0.32 0.57
1600 1584.89 0.23 0.52 0.73
2000 1995.26 0.11 0.65 1.07
2240 2238.72 0.25 0.77 1.14
2500 2511.89 0.17 1.28 1.55
2800 2818.38 0.19 1.07 1.37
3150 3162.28 0.13 0.98 1.52
3550 3548.13 0.35 1.10 1.67
4000 3981.07 0.10 1.35 1.93
4500 4466.84 0.32 1.64 2.63
5000 5011.87 0.57 2.51 3.44
5600 5623.41 0.65 2.68 4.09
6300 6309.57 0.60 2.98 4.20
7100 7079.46 0.47 2.97 4.65
8000 7943.28 0.92 3.22 5.78
8500 8413.95 1.05 4.20 6.41
9000 8912.51 0.79 4.81 6.72
9500 9440.61 0.76 4.74 7.31
10000 10000.0 0.70 4.76 7.37
10600 10592.5 1.04 4.84 7.88
11200 11220.2 1.34 5.69 8.27
11800 11885.0 1.42 6.59 9.72
12500 12589.3 1.16 7.15 10.94
13200 13335.2 1.32 7.75 11.51
14000 14125.4 1.64 8.50 11.76
15000 14962.4 1.76 8.91 12.85
16000 15848.9 1.63 10.45 15.01
17000 16788.0 1.73 10.94 16.60
18000 17782.8 2.13 11.26 15.62
19000 18836.5 2.19 12.01 16.84
20000 19952.6 2.18 13.04 21.47