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dB from 63Hz to 8KHz:
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Enter the levels in dB per octave-band.
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Calculation:
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Launch the global level calculation.
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Initialization:
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Configurated at level of 99dB in the bands 125, 250, 500, 1KHz, 2KHz and 4KHz.Configurated at level of 0dB on the bands 63KHz and 8KHz.The weighted total is nearly 105dB.
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Weighting A:
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Result in dB of global weighting level A.
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Weighting C:
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Result in dB of global weighting level C.
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Weighting Z:
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Result in dB of global weighting level Z.
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Level per Octave:
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The levels per octave-bands are displayed, taking into account the weighting, A in yellow, C in blue, Z in green.
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Global Level:
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The global level is displayed for the weighting, A in yellow, C in blue, Z in green.
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Example:
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We can notice the very low influence of the 63Hz and 125Hz bands on the global in A against the global C and Z. The initialization values give A: 105.3dB C: 106.6dB Z: 106.8dB.
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If we add 10dB at level 15Hz => 99 + 10 = 109dB
The levels come to A: 105.47dB C: 110.56 Z: 110.76
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If we add in addition 120dB to 63Hz => 0 + 120 = 120dB.
The levels come to A: 105.76 C: 119.76 Z: 120.49.
We see that the global A virtually didn’t move against C and Z although we switched from 99 to 109dB for the 125Hz and from 0dB to 120dB for the 63Hz.
Therefore we note that only the action per octave-band can solve the emergence problems ( situated virtually always at the bottom of the spectrum) eventually the action in global C but of course not the action in weighting A.
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Audio Professionnel
