We have not tested these products. This comparison is reasoned from manufacturer specifications, documentation and warranty terms. How we test
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Treatment is not soundproofing. Soundproofing stops sound entering or leaving a room and requires mass and construction. Treatment changes how the room sounds inside, and it is cheap.
What the problem actually is
Your voice leaves your mouth, some of it reaches the microphone directly, and the rest bounces off the walls and arrives shortly afterwards. Those delayed copies are what make a recording sound hollow, distant and roomy. That applies to a voice track recorded alongside gameplay from a capture card as much as to a podcast.
The goal is to reduce the reflected copies relative to the direct sound. Two things achieve it: getting closer to the microphone, which costs nothing beyond an arm that holds it there, and absorbing the reflections, which is cheap.
Where to start
First reflection points, found with the mirror method: sit where you record, slide a mirror along the side wall, and mark wherever you can see your microphone position. Those are the spots.
The wall your microphone points at, which for a cardioid microphone is behind you, and which is receiving the most energy from your voice.
Corners, where low frequencies accumulate. This matters more for studio monitors than for voice.
How we assessed this
The principles here are room acoustics rather than product claims: absorption coefficients vary with material thickness and density, and early reflections are what colour a recording. Nothing was measured in a specific room by us.
Questions people ask
Does egg foam work?
Barely, and it is the most persistent myth in this area. Thin foam absorbs high frequencies reasonably well and does essentially nothing below the midrange, which means it removes the crispness from a room while leaving the boominess untouched. The result is a space that sounds dull and still echoey in the lower registers. Thickness and density are what determine what a material absorbs, and thin foam has neither.
Where should the first panel go?
At the first reflection points, which are the spots on the side walls where sound from your source bounces once before reaching your ears or your microphone. Find them with the mirror method: sit in your normal position, have someone slide a mirror along the wall, and mark every point where you can see the speaker or the microphone position. Those points are where absorption does the most work per panel.
How much treatment do I need for voice?
Far less than a mixing room needs, which is good news. For voice recording you are mainly trying to stop early reflections arriving at the microphone shortly after your voice does, and a few well-placed absorbers plus soft furnishings usually achieves it. A rug, curtains, a full bookshelf and something absorbent on the wall your microphone points at will get most of the way. You do not need to cover the room.