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4-16
Results
Sound spectrum
Evaluated sound pressure
level in dB (A)
• Select 'Third-octave bar' or 'Octave bar' for the graph type.
• Set the 'reference value' needed to calculate the sound pressure
level (for example, for airborne sound p
The reference value unit corresponds to the measurement quantity
set in the spectrum. The unit can only be changed for user-defined
Note
quantities.
• Set a suitable evaluation filter (decibels (A),(B), (C) or (D)). If you
do not wish to evaluate the sound pressure level with a filter, set
'decibel'.
• Then press the MENU button and click on 'Save'.
The individual frequency bands (third-octaves, octaves) appear in
the sound spectrum, as does the overall sound level in a logarithmic
scale. The lower Info field specifies the sound pressure levels of the
individual bands. The cursor and zoom functions are not available in
this display.
= 20 µPa = 2 x 10
Pa).
-5
0
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