How do you soundproof a basement ceiling and walls?

To soundproof a basement ceiling, we often apply soundproofing insulation such as rockwool. For walls, we employ an alternating stud design to help decrease the transmission of sound through vibration. We’ll also take care to seal off all penetrations, including electrical outlet and switch locations. If air can pass through it, so can sounds. If this is a critical component for your basement design, then time will be spent to create a sound plan.