IIC (Impact Noise) Explained - The SOUND Project Episode 133

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The SOUND Project

Haverstick Designs

134 episodes

1 week ago

The S.O.U.N.D. Project is a podcast by Haverstick Designs that promotes discussions about acoustical topics involved with designing recording studios and other acoustical spaces. We will review tips and tricks to get the most out of your space acoustically, case studies of rooms we have completed, progress reports on rooms we are currently working on, along with interviews with artists, studio owners, and leading manufacturer representatives. We are excited to take this journey with you, and thank you for being a part of The S.O.U.N.D. Project!

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IIC (Impact Noise) Explained - The SOUND Project Episode 133

The SOUND Project

9 minutes 39 seconds

4 weeks ago

IIC (Impact Noise) Explained - The SOUND Project Episode 133

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