Estimate how much sound may pass through a door after soundproofing. Enter the starting noise level, door rating, seal quality, door sweep condition, and optional weak spot penalty to calculate effective door reduction and final sound level.
Starting noise level:
Enter the sound level on the noisy side of the door.
Door rating:
Enter the door’s estimated sound reduction or STC-style rating.
Leak penalties:
The calculator subtracts penalties for weak seals, bottom gaps, frame leaks, and other weak points to estimate effective door reduction.
A door soundproofing calculator helps estimate how much noise may pass through a bedroom door, office door, studio door, apartment door, home theater door, or mechanical room door.
This is a simplified estimate. Actual performance depends on the door slab, frame, seals, sweep, threshold, latch pressure, wall construction, nearby vents, and flanking paths.
This calculator uses a simplified door sound reduction estimate:
Start with the door’s sound reduction rating, subtract penalties for seals, door sweep gaps, and weak spots, then subtract the effective reduction from the starting sound level.
A solid-core, well-sealed door is usually much better than a hollow-core door. Acoustic-rated doors can perform even better when installed correctly.
Yes. A door sweep or automatic door bottom can reduce sound leakage through the gap under the door, especially when paired with a good threshold.
Sound can leak around the door edges, under the door, through the frame, through a hollow door slab, or through nearby vents and flanking paths.