Svantek Shawcity SVAN 977C, User Manual

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225
SVAN 977C User Manual - Appendixes
Effect of temperature < 0.5 dB (from -10

C to + 50

C)
Operating temperature from -10

C to + 50

C
Storage temperature from -20

C to + 60

C
Free Field frequency response of SVAN 977C
Typical Free Field frequency responses of MK 255 and SVAN 977C are presented on the below figure together
with the
ffect of reflections and diffraction of the acoustic plane wave from the case of SVAN 977C (“case
effect”).
Table C.1.1. SVAN 977C typical Free Field frequency
characteristics and “Case effect”
Frequency
Typical MK 255 Free
Field response
Typical SVAN 977C
Free Field response
SVAN 977C Case
effect
Uncertainty
(IEC 62585:2012)
[Hz] [dB] [dB] [dB] [dB]
251.19
0.03 -0.01 -0.05
0.25
258.52 0.02 -0.02 -0.05
0.25
266.07 -0.01 -0.05 -0.04
0.25
273.84
-0.02 -0.05 -0.03
0.25
281.84
-0.01 -0.04 -0.02
0.25
290.07 0.00 -0.04 -0.04
0.25
298.54 0.02 -0.03 -0.05
0.25
307.26 0.02 0.03 0.01
0.25
316.23
0.04 0.08 0.05
0.25
325.46
0.01 0.04 0.03
0.25
334.97 -0.02 -0.04 -0.02
0.25
344.75 -0.03 -0.05 -0.02
0.25
354.81
-0.02 -0.04 -0.01
0.25
365.17
-0.01 0.00 0.01
0.25