Video calls, voice notes and podcasts have turned spare bedrooms into studios. If your recordings sound hollow, or colleagues say you sound as if you are in a bathroom, the room is probably the cause, not the microphone. Acoustic panels can help a great deal. They can also be bought in the wrong quantity, the wrong thickness or for the wrong place. Here is how to tell what you need.
Small rooms have their own problems
Small rooms rarely have the long, ringing tail of a church hall. Their problems are closer to the microphone. Sound bounces off a nearby wall or desk and reaches the microphone a fraction after your voice does, which colours the sound and makes it thin or boxy. Two bare parallel walls can create a fluttering buzz when you clap. And small rooms tend to have uneven bass, with some low notes booming and others disappearing depending on where you sit.
Echo inside the room
- A hard, ringing sound
- Voices that blur together
- People raising their voices to be heard
Sound passing through walls
- Noise from the next room
- Noise from outside
- Anything that gets through the structure
Quick checks
Clap once where you sit to record. A metallic ring or flutter means bare parallel surfaces. Record a minute of speech and listen back on headphones: if your voice sounds distant or hollow compared with a recording made in a well-furnished room, reflections are getting in. If background hum, traffic or a neighbour’s television is the problem instead, that is noise getting in from outside the room, and panels will not cure it.
What panels do well
Porous panels, such as mineral wool or dense foam behind fabric, reduce reflections and tame flutter echo, which makes speech sound closer, clearer and drier. That is exactly what most voice recording and video calls need. In a typical spare room the surfaces that matter most are the ones that bounce your voice straight back towards the microphone: the wall in front of you, the wall behind you and the walls to either side. The ceiling above the desk can help too. Soft furnishings count as well: a rug, curtains, a sofa and a full bookcase all contribute.
What panels do not do
Panels do not soundproof. They make the room you are in sound better, but they barely change how much sound passes through the walls, door or window, in either direction. If the problem is a dog next door or a partner on a call in the next room, you are looking at sealing gaps and heavier doors and walls, which is a different job. Thin foam tiles also do little for low frequencies, so a room that sounds boomy may need thicker treatment or corner bass traps, and in a very small room some bass unevenness is hard to remove completely.
Changes that cost nothing
Before buying anything, try the free fixes. Move the desk so you are not talking straight at a bare wall a short distance away. Face into the room, towards the soft furniture, rather than towards a window. Get the microphone closer to your mouth, so your voice is much louder at the microphone than the reflections are. Draw the curtains, put a rug down and fill the bookcase. Record a test after each change and listen back on headphones. Many people find these steps alone get a call-quality room most of the way, and they make it much easier to see what any panels you add are actually doing.
How many do you need?
It depends on the size of the room, what is already in it and what you use it for. A furnished study used for calls may need only a few well-placed panels. A bare room used for music or voice-over may need considerably more. Buying a fixed bundle without knowing where you start is how people end up with a wall full of foam and a voice that still sounds hollow, or a room so dead it feels uncomfortable to sit in.
Recording rooms and critical listening
If you mix or master music, or are setting up a home cinema, the bar is higher, because you care about how the room sounds at the listening position across the whole range of pitch, not just for voice. Our room-modes page explains why bass problems arise, and installers working to a listening target have their own page.
Getting a straight answer
Echo, from AcoustaPLOT, predicts how your room behaves from its size and finishes and compares practical options, so you can see whether a few panels, more panels or something else entirely is worth the money before you order anything. The free demo is a quick way to get a feel for it.
Echo is an indicative design guide, not a guarantee of performance or a substitute for a consultant where one is required.