B&K 2250 Light Manual de usuario Pagina 263

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APPENDIX A
Setup Parameters
251
A.19 Tone Assessment
Table A.19 Tone Assessment Parameters
*
Parameter Values Comment
Tone Assessment On
Off
Set Tone Assessment to On to enable tone
assessment functionality, then select the Tone
parameter above the spectrum to display the
results
Tone Standard ISO 1996:2-2007
DM 16-03-1998
Set the Tone Standard in accordance with
your requirements:
ISO 1996:2-2007, Annex D is the objective
method for assessing the audibility of tones in
noise – simplified method. This method uses
1/3-octave spectra
DM 16-03-1998 assesses tone using
1/3-octave spectra according to Italian Law:
Ministero dell’Ambiente, Decreto 16 marzo
1998
Adjustment 0.0 to 20 dB This is the adjustment you should add to L
Aeq
if audible tones are found in the spectrum. The
resulting adjustment can be read below the
spectrum
Note: The adjustment is fixed to 5 dB in the
DM 16-03-1998 standard
Low Freq. Last Band 12.5 Hz to 315 Hz Set the frequency for the last band of the low
frequency range of the assessment. Default is
125 Hz
The low frequency range is from the lowest
measured frequency band to the value of the
Low Freq. Last Band parameter
Note: Only available if Tone Standard
parameter is set to ISO 1996:2-2007
Middle Freq. Last Band 160 Hz to 20 kHz Set the frequency for the last band of the
middle frequency range of the assessment.
Default is 400 Hz
The middle frequency range is from one band
higher than the Low Freq. Last Band
parameter to the value of the Middle Freq.
Last Band parameter
Note: Only available if Tone Standard
parameter is set to ISO 1996:2-2007
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