Cavity walls provide sound insulation between the inner and outer walls. They contain an air gap filled with materials like mineral wool or polystyrene that absorb sound vibrations preventing them from passing through. Effective cavity wall design and proper installation of soundproofing materials maximize sound dampening between interior and exterior spaces.

3. https://en.wikipedia.org/wiki/Cavity_wall

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https://en.wikipedia.org/wiki/Cavity_wall

5. https://build.com.au/double-brick-walls-and-rwar

6. https://www.ikoustic.co.uk/products/acoustic-underlay/rockwool-acoustic-
mineral-wool-rw3-100mm-60kgm%C2%B3

9. https://soundproofexpert.com/polystyrene/

10. https://www.phelpsgaskets.com/blog/material-for-sound-proofing-and-sound-
dampening

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https://www.phelpsgaskets.com/blog/material-for-sound-proofing-and-sound-
dampening

12. https://www.phelpsgaskets.com/blog/material-for-sound-proofing-and-sound-
dampening

13. The sound Insulation of cavity walls,

14. The sound Insulation of cavity walls,

15. The sound Insulation of cavity walls,

16. The sound Insulation of cavity walls,

17. The sound Insulation of cavity walls,

18. https://www.archdaily.com/922897/how-do-double-skin-facades-work
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19. (Huang, Yang and Yang, 2014)