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Radio Shack Digital SPL Meter.

Discussion in 'AV Receivers & Amplifiers' started by pwiles1968, Jan 20, 2004.

  1. pwiles1968

    pwiles1968
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    I would like to use my Meter as a Mic and Pre Amp to to some spectrum measurement with a program I have, does anyone have the correction file/data (dB/Frequency). For these so I can calibrate the program I am using to the meter.
     
  2. eviljohn2

    eviljohn2
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    Which software have you decided on then? There were a lot of ideas thrown around in your previous thread on this!
     
  3. pwiles1968

    pwiles1968
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    I got hold of a copy of Spectrogram V5.0.8 form a colleague at work it is a older version but as such is Freeware, there are later versions which cost about $45, this one seems to do what I need including an Excel export option, it has a Frequency Calibration function (dB weighting at certain frequencies) hence the thread and the request for a cal file for the SPL Meter, you can do real time Scans, scans on files and analysis of a file. Seems quite good the average is limited to 128 samples but that will be good enough if I use pink or white noise.

    I can not seem to find this version for download on the web only the later one which is a pay version (with demo period) but mine is freeware so I suppose I could mail it out if you are interested.

    Once I have the unit calibrated I will put a note in my original thread.
     
  4. eviljohn2

    eviljohn2
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    Sounds good! Although I'm interested in that sort of software, I've not got an SPL meter yet :rolleyes:

    I'll probably be in touch if you can get it working. :)
     
  5. pwiles1968

    pwiles1968
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    Found the info did a quick web trawl, this is for the analogue meter I am assuming it is the same for the digital version?

    10hz.....+20db
    12.5hz...+16.5db
    16hz.....+11.5db
    20hz.....+7.5db
    25hz.....+5db
    31.5hz...+3db
    40hz.....+2.5db
    50hz.....+1.5db
    63hz.....+1.5db
    80hz.....+1.5db
    100hz....+2db
    125hz....+.5db
    160hz....-.5db
    200hz....-.5db
    250hz....+.5db
    315hz....-.5db
    400hz....0db
    500hz....-.5db
    630hz....0db
    800hz....0db
    1k.......0db
    1.25k....0db
    1.6k.....-.5db
    2k.......-1.5db
    2.5k.....-1.5db
    3.15k....-1.5db
    4k.......-2db
    5k.......-2db
    6.3k.....-2db
    8k.......-2db
    10k......-1db
    12.5k....+.5db
    16k......0db
    20k......+1db
     
  6. steev

    steev
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    Is there any software that could use a normal microphone as a basic SPL meter? Just for balancing a home system an SPL meter seems like overkill.

    21/1/04 I thought about this some more after I wrote the above. For balancing speakers you only need relative levels rather than actual DB. What's needed is some software that takes levels and displays them in some useful form (number or graph). Then you just need to adjust the other speakers to match that.

    I am a programmer, but this is not really my field. Maybe it's time to learn.
     

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