Gavin defines Impact Insulation Class (IIC) and shows how it relates to sound isolation for footsteps, furniture movement, and other floor-borne vibration. He contrasts IIC with STC (airborne noise), walks through the rating scale and typical code minimums, outlines recommended IIC targets for different building types, demonstrates how IIC is tested with a tapping machine (ASTM method; result rated per ASTM E989), and details practical ways to improve IIC, like carpet + pad, floor underlayment, floating floors, and when ceiling upgrades help. He also notes slab thickness effects and why avoiding stacked noise-sensitive rooms matters.
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#SoundDesign #Acoustics #ImpactNoise #SoundIsolation #IIC #STC #RecordingStudioDesign #TheSOUNDProject #BuildingDesign #noisecontrol
Timestamps:
00:00 – Intro
00:08 – What is IIC (Impact Insulation Class)?
01:00 – Everyday examples of impact noise
01:47 – IIC performance ratings explained (poor to excellent)
02:28 – Recommended IIC levels for different building types
04:09 – IIC vs. STC: Impact vs. airborne noise
04:57 – Testing methods: tapping machine & ASTM standards
05:44 – How to improve IIC: carpets, underlayments, floating floors
07:21 – Ceiling treatments and design considerations
08:08 – Concrete slab thickness & room stacking issues
08:42 – Summary & key takeaways
09:26 – Outro
