acoustics echo noise sound properties transmission

Dw means the sound insulation between rooms on-site. Rw represents the lab tested sound insulation of an element making up a partition wall/floor type. Standards that are made in labs may not be possible on site because of the quality of workmanship and due to sound ‘flanking’ acoustic parts, that is, travelling around them through an easier path, rather than only directly through them as under laboratory conditions.

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