Frequently Asked Questions
1. What is the difference between soundproofing and acoustic treatment?
This is the most common misconception. Soundproofing stops sound from leaving or entering a room. It requires structural construction: mass (heavy drywall), decoupling (floating floors/walls), and airtight seals. Acoustic treatment controls how sound behaves inside the room to improve recording and mixing quality. Putting panels on a wall will make your mix sound better, but it will not stop your neighbors from hearing your bass.
2. Do egg cartons work for acoustic treatment?
Absolutely not. Egg cartons lack the mass and density required to absorb any meaningful acoustic energy. They may slightly diffuse extreme high frequencies due to their shape, but they do nothing to control the mid or low frequencies that ruin a mix. Furthermore, they are highly flammable and present a severe fire hazard in a studio full of electronics.
3. Where should I put my bass traps?
Low-frequency energy accumulates in room corners due to boundary proximity. Therefore, bass traps (thick, dense mineral wool or fiberglass panels) should straddle the vertical corners of your room. The floor-to-wall and ceiling-to-wall corners (trihedral corners) are the most critical impact zones.
4. I only have budget for a few panels. Where do they go?
Prioritize your first reflection points. Sit in your mix position and treat the spots on the left and right walls exactly halfway between your monitors and your ears. Treat the ceiling directly above you (an acoustic cloud). This establishes a clean listening sweet spot free of immediate phase cancellation.
5. Why do my mixes sound great in my room but terrible in my car?
This indicates severe acoustic issues in your room, usually low-end phase cancellation. If your room "eats" bass frequencies, your monitors sound thin. To compensate, you mistakenly boost the bass on your EQ. When you play that mix in a car (which acts as a giant bass trap), the low end is overwhelmingly loud. Treating your room flattens your monitoring so your decisions translate accurately elsewhere.
6. Should I cover every wall in foam?
No. Covering 100% of a room in thin foam absorbs all the high frequencies but leaves the low/mids unchecked. This results in a "dead" but "boomy" room. Proper treatment balances broadband absorption (catching highs, mids, and lows) while leaving some reflective surfaces to retain a natural sense of space.
7. Can books and furniture act as diffusers?
Yes, to an extent. A bookshelf filled irregularly with books of varying depths acts as a rudimentary quadratic diffuser, breaking up flat wall reflections. Couches and heavy curtains also provide some absorption. An inhabited, furnished room is always acoustically superior to an empty, square bedroom.
8. Do acoustic shields (reflection filters) around the mic work?
They have marginal utility. They block high-frequency reflections coming from the front and sides of the mic. However, a cardioid microphone rejects sound from the rear. The most damaging reflections usually come from the wall behind the singer, bouncing back into the sensitive front of the mic. A vocal booth behind the singer is far more effective than a tiny shield behind the mic.