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Thermal insulation of individual building
B Full thermal insulation of the external wall
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according acoustic air-bome sound air-borne sound reduction angle Appendix Figure Appendix Table attenuation basic floor building elements Building Research Establishment calculated coefficient component condensation daylight factor dB(A determined diagram diffuse double-leaf effect f Hz flexurally floating screeds floor covering floor structure frequency range glazing heat Heft impact sound insulation impact sound level impact sound reduction increase lightweight ln addition measures mm/m normalised impact sound obstruction octave panel perforated plaster porous possible propagation radiation recommendations reference curve reflected reinforced concrete requirements roof saturation vapour pressure single-leaf sound bridges sound level curve sound power level sound pressure sound pressure level sound reduction curve sound reduction factor sound reduction index sound source sound transmission sound wave structure-borne sound surface condensation surface mass suspended ceiling temperature thermal insulation thermal resistance thermal transmittance thickness values ventilation Washington D.C. weighted sound reduction West German window wood-wool slabs