Solid-core (MDF or wood composite) is the best value for noise control; it’s heavier and bumps the STC rating compared to hollow-core. Pair that weight with a tight frame, three good hinges, and compression weatherstripping around the jamb. A surface or mortised drop seal at the bottom closes the last gap, which is often half the problem. If you like glass, choose laminated lites rather than standard tempered. Prehung units simplify fit, and a square, plumb install keeps the latch side from leaking sound. For quick reference on slab types, frames, and seal kits, the product pages at buildmart windows and doors show practical combos without going full studio. Add a soft-close latch to prevent slamming, and if you need more, a simple acoustic sweep plus a rug outside the door can shave a couple extra decibels without tearing into walls.