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Six Fold Leveling Machine

2017-2-12 · The intensity falls to 25% or 1/4 fold of the initial value of the acoustic or sound intensity. The sound intensity decreases with the ratio 1/r 2 of the distance. The loudness level decreases with doubling of distance also by (−)6 dB. The loudness falls to 63% or ca. 2/3 fold …

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