BRUEL & KJAER 4184-A, Техническая документация инструкция, Страница: 41 / 52

APPENDIX A
Tables
35
Table A.44 Weatherproof Microphone Unit Type 4184-A is not specified together with Outdoor Microphone Kit
UA-1404
Table A.45 Weatherproof Microphone Unit Type 4184-A is not specified together with Outdoor Microphone Kit
UA-1404
Table A.46 Weatherproof Microphone Unit Type 4184-A is not specified together with Outdoor Microphone Kit
UA-1404
Table A.47 Weatherproof Microphone Unit Type 4184-A is not specified together with Outdoor Microphone Kit
UA-1404
Table A.48 Weatherproof Microphone Unit Type 4184-A is not specified together with Outdoor Microphone Kit
UA-1404
A.6 Periodic Testing of Acoustical Frequency Responses
This section gives the adjustment data that must be applied to sound levels displayed in response to the
sound pressure produced by Multifunction Acoustic Calibrator Type 4226, in order to obtain the
equivalent sound levels that would be displayed under reference environmental conditions in response to
plane progressive sinusoidal sound waves incident from the reference direction. See Table A.49 to view
the data.
The uncertainty of the corrections in Table A.49 includes a component for inter-sample variability of
Weatherproof Microphone Unit Type 4184-A. Due to the construction of the microphone, the inter-sample
variability cannot be separated from the adjustment data. The uncertainty is allowed for in the adjustment
of Weatherproof Microphone Unit Type 4184-A.
NOTE: that the data in Table A.49 are only valid at the frequencies stated in the table. The data values can
not be interpolated for other frequency values.
Table A.49 Acoustical test with Multifunction Acoustic Calibrator Type 4226. Adjustment data that must be applied to
the readings of the analyzer in order to obtain equivalent sound levels that would be displayed in response to plane
progressive sinusoidal sound waves incident from the reference direction
Nominal Exact Correction Data Expanded Correction Data Expanded Correction Data Expanded
Frequency Frequency For 4184-A 0

Uncertainty For 4184-A 90

Uncertainty for Diffuse Field Uncertainty
(6 digits) (Top) (Side)
Hz Hz dB dB dB dB dB
31.5 31.6228 0.00 0.05 0.00 0.05 0.00 0.05
63 63.0957 0.00 0.05 0.00 0.05 0.00 0.05
125 125.893 0.00 0.05 0.00 0.05 0.00 0.05
250 251.189 0.00 0.05 0.00 0.05 0.00 0.05
500 501.187 0.10 0.16 –0.09 0.16 –0.01 0.16
1000 1000.00 0.19 0.14 0.07 0.14 0.12 0.15
2000 1995.26 0.36 0.19 –0.06 0.19 0.22 0.21
4000 3981.07 0.75 0.32 –0.71 0.32 –0.40 0.36
8000 7943.28 0.52 0.53 –1.81 0.53 –1.32 0.56
12500 12589.3 1.46 0.76 –1.85 0.76 –1.07 0.78
16000 15848.9 0.80 1.30 –2.38 1.30 –1.65 1.32
Table A.50 No data are given for Acoustical Test with Electrostatic Actuator UA-0033