How can I get the dB SPL in a stored RTA measurement?

Discussion in 'Official REW (Room EQ Wizard) Support Forum' started by Afon, Jul 14, 2017.

  1. Afon

    Afon New Member
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    Hi, everyone.
    I'm using REW as a background noise analyzing tool. But I found I can't get dB SPL from a RTA measurement. It only shows the dB SPL relative to the position of cursor.
    How can I get it, if I only had a RTA measurement file?
    Thank you very much
     

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  2. John Mulcahy

    John Mulcahy REW Author

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    It is shown in the comment for the saved measurement. If you want to capture levels over time probably better using the Logger on the SPL Meter.
     
  3. Afon

    Afon New Member
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    Hi, John.
    Thank you for your reply.
    In my case, there's only RMS in the comment, that's wrong value, and it should be around 40 dBSPL. You could check my attachment.
    For my application, It needs spectrum for short time period, also the dB SPL for that moment is important too. The SPL logger might not the right choice for it.
    Thank you again.

     

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  4. John Mulcahy

    John Mulcahy REW Author

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    That RMS figure is the dB SPL reading, it is the same figure that appears at the top of the RTA graph on the right hand side when measuring. Bear in mind the RTA readings are unweighted so low frequency content has more influence than with a C or A weighted SPL meter reading.
     
  5. Afon

    Afon New Member
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    Hi, John.
    Got it. Is there any possibility to add C or A weighted on it?
    Thanks.
     
  6. John Mulcahy

    John Mulcahy REW Author

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    Yes, I've added those for the next beta.
     
  7. Afon

    Afon New Member
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    Cool, When will it be released?

     
  8. John Mulcahy

    John Mulcahy REW Author

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    Probably around the end of the month.
     

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