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What hardware and software would I need to get a true decibel reading of my system???

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  • What hardware and software would I need to get a true decibel reading of my system???

    I am a car audio buff to say the least and one of the main reasons for building my carputer was to get a true accurate decibel reading of my system. The question is what hardware and software would I need to do this???
    SUVPUTER:
    AMD~SILVERSTONE~AUDIO CONTROL~BOHLENDER GRAEBENER~IMAGE DYNAMICS~ROCKFORD FOSGATE~OPTIMA~STINGER

  • #2
    if you're a car audio buff, shouldnt you know this already?


    j/k. not sure, would be interesting to know though. i imagine you could pretty much hook a mic and do some db tests, but that wouldnt be too accurate
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    • #3
      Well I was under that assumption also, but the problem would be finding the correct software. I would like to hear some other opinions though!
      SUVPUTER:
      AMD~SILVERSTONE~AUDIO CONTROL~BOHLENDER GRAEBENER~IMAGE DYNAMICS~ROCKFORD FOSGATE~OPTIMA~STINGER

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      • #4
        Maybe something like this? I'm not sure how accurate it may be, but accuracy can cost money. Measurement mics, preamps, calibrators... but for rough numbers, looks like it can be done cheaply.

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        • #5
          just googling same type of soft:

          http://www.telebyte.com/pioneer/
          http://www.qsl.net/dl4yhf/spectra1.html
          http://www.dxzone.com/catalog/Softwa...rum_analyzers/
          ----------------------
          VIA Epia II
          256MB 266DDR Ram
          90GB Wester Digital
          Bluetooth/Deluo GPS
          Lilliput 7" Touchscreen
          ----------------------
          Mazda 6 Carputter > Click Me!

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          • #6
            Awesome exactly what I needed!!!
            SUVPUTER:
            AMD~SILVERSTONE~AUDIO CONTROL~BOHLENDER GRAEBENER~IMAGE DYNAMICS~ROCKFORD FOSGATE~OPTIMA~STINGER

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            • #7
              Actually sound specs are measured at 1 meter away from the speakers. If you're really interested on how they do this, i have time.
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              • #8
                Sensitivity measurements are usually (always? I don't think I've ever seen one that wasn't) done at 1m (xxdB @ 1W/1m). Seems like he's looking for raw, "Hey, I'm pumping 130dB SPL in the cabin" type measurements. Maybe I'm being picky, just felt the need to clairify the statement.

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                • #9
                  Originally posted by SupaDave
                  Sensitivity measurements are usually (always? I don't think I've ever seen one that wasn't) done at 1m (xxdB @ 1W/1m). Seems like he's looking for raw, "Hey, I'm pumping 130dB SPL in the cabin" type measurements.
                  Tick on the speaker specific measurements.

                  For SPL, the mic (which is calibrated and therefore worth either a fortune, or two fortunes depending on how loud it's able to handle) is placed on a stand in the car in the position where a head would be in the front seats. It's been a while since I've competed, so the rules may have changed a little.

                  C!
                  http://carpc.riposte.net
                  I reserve all rights in connection to each post I author, without exception.

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                  • #10
                    True Rta

                    Originally posted by kingeorge36 View Post
                    Awesome exactly what I needed!!!
                    did u get that program to give u a good reading on your spl db's
                    cause in comp i hit 143 dbs and that program says im in the 120s but im only using the built in mic on my lab top do u need a mic mixer and good mic?

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                    • #11
                      for the reading to be worth anything the whole end result would need to be calibrated, even if the software is acurate & the mic is good, this is really only good to compare one vehicle or setting to another with the same equiptment....

                      it's the calibration that makes the number worth anything....

                      most real events use the audiocontrol with an spl pack, higher readings & an spl mic..., or at least they did for years.... not to sure what they use now though...

                      I've seen a lot of smaller events that they'll tell you, "oh just add 2 to the number to know the "real" reading"... a lot of meters are not acurate to true readings, but are acurate enough for a side by side comparison...

                      if you want true readings you can crudely calibrate it yourself by attending an event with a real meter, & comparing the results to yours...

                      that's where the "just add 4 to the number" comes from...
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                      • #12
                        a Termlab would get you what you want and then some.

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                        • #13
                          Originally posted by Shadow View Post
                          a Termlab would get you what you want and then some.

                          but....$$$$
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                          • #14
                            Originally posted by IC-C30 View Post
                            but....$$$$
                            Indeed....it's what I was going to suggest
                            Chris Schempp
                            Elemental Designs

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