B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 60)

APPENDIX A

Tables

A.2 Free-field Frequency Responses

Frequency responses for plane progressive sinusoidal sound waves incident from the reference direction

with Z-frequency-weighting:

Table A.2 Free-field frequency response of Microphone Type 4189 only, with sound field at 0

angle of incidence

to the microphone. Sound Field Correction parameter set to ‘Free-field’ and the Windscreen Correction parameter set

to ‘None’.

Nominal Exact (6 digits) Micr. Actuator Micr. FF Electrical Acoustical Expanded

Frequency Frequency Response Correction Response Response Uncertainty

dB dB dB dB dB

63 Hz 63.0957 Hz 0.00 0.00 0.00 0.00 0.05

80 Hz 79.4328 Hz 0.00 0.00 0.00 0.00 0.05

100 Hz 100 Hz 0.00 0.00 0.00 0.00 0.05

125 Hz 125.893Hz 0.00 0.00 0.00 0.00 0.05

160 Hz 158.489Hz 0.00 0.00 0.00 0.00 0.05

200 Hz 199.526Hz 0.01 0.00 0.00 0.01 0.05

250 Hz 251.189Hz 0.00 0.00 0.00 0.00 0.05

315 Hz 316.228Hz –0.01 0.01 0.00 0.00 0.06

400 Hz 398.107 Hz –0.02 0.01 0.00 –0.01 0.06

500 Hz 501.187 Hz –0.03 0.02 0.00 0.00 0.07

630 Hz 630.957 Hz –0.04 0.04 0.00 0.00 0.07

9500 9440.61 –2.09 –4.00 0.00 0.01 0.01 0.00

10000 10000 –2.47 –4.39 0.00 0.01 0.01 0.00

10600 10592.5 –2.89 –4.80 0.00 0.01 0.01 0.00

11200 11220.2 –3.33 –5.25 –0.01 0.00 0.00 –0.01

11800 11885.0 –3.81 –5.73 –0.01 0.00 0.00 –0.01

12500 12589.3 –4.32 –6.24 –0.01 –0.01 –0.01 –0.01

13200 13335.2 –4.86 –6.78 –0.01 –0.03 –0.02 –0.01

14000 14125.4 –5.43 –7.35 –0.01 –0.04 –0.04 –0.01

15000 14962.4 –6.03 –7.96 –0.01 –0.06 –0.06 –0.01

16000 15848.9 –6.66 –8.58 –0.01 –0.07 –0.07 –0.01

17000 16788.0 –7.31 –9.23 –0.02 –0.08 –0.08 –0.02

18000 17782.8 –7.96 –9.89 –0.02 –0.08 –0.07 –0.02

19000 18836.5 –8.61 –10.54 –0.02 –0.04 –0.04 –0.02

20000 19952.6 –9.23 –11.16 –0.02 0.06 0.06 –0.02

21200 21134.9 –9.76 –11.69 –0.03 0.26 0.26 –0.03

22400 22387.2 –10.16 –12.09 –0.13 0.52 0.53 –0.13

Table A.1 (cont.) Electrical frequency response with the Microphone Type parameter set to ‘Unknown’ (in the

Transducers display) for the transducer used.

Nominal

Frequency

(Hz)

Exact

Frequency

(6 digits)

(Hz)

Electrical

Response

(2 decimals)

(dB)

Deviation

from Ideal

(2 decimals)

(dB)

A-

weighting

C-

weighting

Z-

weighting

A-

weighting

C-

weighting

Z-

weighting

BE171211.book Page 55 Thursday, May 27, 2004 1:01 PM

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