In Hour 3, Dean continues breaking down the science of soundproofing and how to create a more peaceful living space. He explains the concept of decoupling walls to interrupt the transfer of sound energy, and how techniques like resilient channels, staggered studs, and floating walls can dramatically reduce noise. Dean also walks through the roles of damping and absorption — from mass-loaded vinyl to acoustic panels — and discusses when it's worth investing in high-end materials versus simple insulation. Whether it’s footsteps from upstairs or traffic noise outside, Dean offers strategic solutions to restore calm and quiet at home.