The extent to which a lowered, false ceiling with noise protection tiles and foam can reduce the sound of heavy footsteps from the floor above will depend on several factors, including the materials used, the construction of the false ceiling, and the intensity of the noise. While it can help reduce some impact noise, complete sound elimination is challenging.
Here are some key points to consider:
Noise Reduction Coefficient (NRC): The Noise Reduction Coefficient (NRC) is a measure of how much sound a material can absorb. Higher NRC values indicate better sound absorption. Acoustic tiles and foams typically have higher NRC values, which can help absorb and reduce airborne noise to some extent.
Impact Noise vs. Airborne Noise: Impact noise, such as heavy footsteps or dropping objects, travels through the structure of the building and can be challenging to reduce with just a false ceiling. Airborne noise, like voices or music, can be better mitigated with acoustic materials.
Ceiling Structure: The design and construction of the false ceiling can also impact its soundproofing effectiveness. If there are air gaps or poor insulation between the false ceiling and the structural ceiling, sound transmission may not be adequately reduced.
Frequency of Noise: The frequency range of the noise also matters. Some materials are better at absorbing high-frequency sounds, while others are more effective at lower frequencies (like heavy footsteps). A combination of materials with different absorption properties can be more effective.
Other Soundproofing Measures: Installing other soundproofing measures, such as resilient channels or sound isolation clips, can complement the false ceiling and provide additional noise reduction.
Room Layout and Design: The layout and furnishings in both the upper and lower rooms can influence sound transmission. Adding soft materials like rugs, curtains, and upholstered furniture can help absorb sound and reduce its impact.
It's important to note that while a well-designed false ceiling with noise-reducing materials can certainly help with soundproofing to some degree, it may not completely eliminate the sound of heavy footsteps from the floor above. Achieving significant noise reduction often requires a combination of various soundproofing techniques, including addressing the floor above and using appropriate materials throughout the room.
For the best results, you may want to consult with an acoustics professional who can assess your specific situation, identify potential noise issues, and recommend appropriate solutions tailored to your needs.