How much sound can be blocked by the sound insulation suspended ceiling? Analyzing from the aspect of hearing, the actual results would be quite different adopting different processing techniques and materials. For example: If you make a traditional soundproof suspended ceiling which is fixed on the original concrete ceiling, sound can still transmit through the expansion bolts, which means the actual insulation performance could be only 20-30%.

If a more advanced suspended ceiling is used, the new type soundproof ceiling is not connected directly to the original concrete ceiling which means it disconnect the sound bridge reasonably, thereby the sound insulation and noise reduction of the soundproof ceiling is significantly improved. Despite the hazard from sound transmitted by the solid wall, the sound insulation and noise reduction performance can be increased to 40-50% better than first case.

If the surrounding walls are all soundproofed by acoustic treatment, plus the advanced suspended ceiling at the top and remove unnecessary windows and doors, the final effect of soundproofing and noise reduction can reach to 70-80%.

If there is enough indoor space, the distance between the suspended soundproof ceiling and the original concrete ceiling can be enlarged, then enlarge gap between the soundproof panels and the original walls, and all windows and doors are soundproofed, in this case it can basically ensure that the actual effect of soundproofing and noise reduction can reach up to 90%. The sound occurred from people walking and furniture dragging on the top of the building is completely inaudible.

However, there are very few height-to-width ratios exceeding 3 meters in general homes, so it is not practical to move the ceiling down by 30 centimeters.