When I do an ACX Check, I get a popup window that lists the values of, for example:
Peak Level - 3.5 db Passes
RMS Level - 19.9 db Passes
Noisefloor - 78.3 db Passes
I understand what those numbers mean, but just below those numbers are these:
RMS (A) 0.056537 (-25.0 db)
Noisefloor (A) 0.000078 (-82.1 db)
DC Offset 0.006148%
What do these numbers mean? Do we need to pay attention only to the first three above?
ACX Check Question
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This forum is for Audacity on Windows.
Please state which version of Windows you are using,
and the exact three-section version number of Audacity from "Help menu > About Audacity".
Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.
This forum is for Audacity on Windows.Please state which version of Windows you are using,
and the exact three-section version number of Audacity from "Help menu > About Audacity".
Audacity 1.2.x and 1.3.x are obsolete and no longer supported. If you still have those versions, please upgrade at https://www.audacityteam.org/download/.
The old forums for those versions are now closed, but you can still read the archives of the 1.2.x and 1.3.x forums.
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kozikowski
- Forum Staff
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- Joined: Thu Aug 02, 2007 5:57 pm
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Re: ACX Check Question
They mean you have the wrong ACX Check. The older tester has troubles with the newer Audacity, so a newer test was developed.What do these numbers mean?
http://wiki.audacityteam.org/wiki/Nyqui ... #ACX_Check
Koz
Re: ACX Check Question
A-Weighting takes into account that fact that our ears are most-sensitive to mid frequencies so it's a more "realistic" measure of perceived loudness or perceived noise. It's NOT used by ACX. The measurements are usually lower which makes a "better" noise measurement. A-Weighting is commonly used in SPL (sound pressure level = acoustic loudness) measurements.