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http://qudt.org/vocab/quantitykind/SoundReductionIndexNamespace
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Sound reduction index
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Applicable units are those of quantitykind:SoundReductionIndex
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The Sound Reduction Index is used to measure the level of sound insulation provided by a structure such as a wall, window, door, or ventilator.
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http://en.wikipedia.org/wiki/Sound_reduction_index
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$R = 10 \log (\frac{1}{\tau}) dB$, where $\tau$ is the transmission factor.
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The Sound Reduction Index is used to measure the level of sound insulation provided by a structure such as a wall, window, door, or ventilator.
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R
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belongs to SOQ-ISO