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Technical Booklet G Resistance to the Passage of Sound·Page 120·B2.18

Sound pressure level measurement precision

Sound pressure levels must be measured with a precision of 0.1 dB.

soundtesting
Sound pressure levels should be measured to 0.1 dB precision.

Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet G - Resistance to the Passage of Sound.pdf