B&K 2250 Light Uživatelský manuál stáhnout pdf (Strana 261)

APPENDIX A

Setup Parameters

249

A.18 Post-processing

Build-up Time 1 to 20 s Set the Build-up Time to allow the sound

pressure in the room to settle after the sound

source is switched on

Bottom Frequency

†

50 Hz to Top Frequency 1/1-octave: 63 Hz – 8 kHz

1/3-octave: 50 Hz – 10 kHz

Note: The settings of Bottom and Top

Frequency control the bandwidth of the noise

from the internal noise generator

Top Frequency

†

Bottom Frequency to

10 kHz

1/1-octave: 63 Hz – 8 kHz

1/3-octave: 50 Hz – 10 kHz

*. Available for Frequency Analysis Software BZ-7223, single channel, and Reverberation Time Software BZ-7227 and

microphone input only.

†. Available for Frequency Analysis Software BZ-7223 only.

Table A.18 Post-processing Parameters

Parameter Values Comment

Ensemble Averaging No

Yes

Set to Yes to average each of the position

decays into an average decay (called the

ensemble average or room average). The

averaged decays of the room can then be

displayed in the Decay View. T30 Room, T20

Room and EDT Room will be calculated from

the room average.

Set to No for no ensemble averaging. There

will be no decays available for the room. T30

Room, T20 Room and EDT Room will be

calculated as averages of the T30, T20 and

EDT, respectively, for all the positions

Table A.17 (Cont.) Generator Parameters

Parameter Values Comment

1 2 ... 256 257 258 259 260 261 262 263 264 265 266 ... 331 332

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B&K 2250 Light Uživatelský manuál Strana 261