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Third octave filter and voltage obtained

  1. Apr 12, 2012 #1
    1. The problem statement, all variables and given/known data
    Hello!
    Problem is as follows: during measurements laboratory we examined characteristics of a third octave and 10% filters, we were noting down two values at each step --> frequency (ranging from ~1000 to ~1600 Hz) and corresponding voltage. However, in order to read the voltage we had to move the knob for multiplier from time to time when values were out of scale.
    The table approximately looks as follows:
    voltage -------------- multiplier
    1,7 -------------- 0,1
    3 --------------
    5--------------
    6,7--------------

    7,2 -------------- 0,3
    8--------------

    4 -------------- 0,1
    1,6--------------

    2,9 -------------- 0,03


    2. Relevant equations
    My question is: should I multiply the measured value by that multiplier or is it somehow already precalculated?

    Any way I leave this, I get a wrong plot...


    3. The attempt at a solution
     
  2. jcsd
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