Types of Acoustic Panels Explained
Updated Nov 13, 2026 · By 
Jonah Mercer · Editorial policy
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The main types are foam panels in wedge, pyramid and flat shapes, fabric-wrapped fiberglass panels, wood diffusers and bass traps. The right type depends on what the room needs: less echo, a flatter response, or control of low frequencies.
Foam panels: wedge and pyramid
Foam panels are a common type in home studios. Wedge foam has angled ridges that break up sound waves, and pyramid foam has raised points that increase the surface area. Foam panels come in 1-inch and 2-inch thickness, and the thicker panel absorbs more of the low end. Foam panels stick to walls and ceilings with adhesive tape or construction adhesive.
Absorption is not soundproofing
Acoustic panels absorb sound inside the room, so they reduce echo and reverberation. If the goal is to keep sound from leaving the room, that takes construction work such as sealed walls and doors, not foam panels on the wall.
Fabric panels, diffusers and bass traps
Fabric-wrapped panels hide a dense core behind cloth, and they suit rooms where foam looks out of place, such as offices and living rooms. Diffusers scatter sound instead of absorbing it, which keeps reflected sound in the room. Bass traps sit in corners and target low frequencies, where flat panels absorb least. Match the type to the problem in the room, not to the look alone.
Thickness, coverage and placement
Thicker panels absorb lower frequencies, so a 2-inch panel reaches lower than a 1-inch panel. Place panels on the walls beside and behind the listening position, where sound reflects first. Start with a few panels and add more until the echo drops, then treat the corners with bass traps. Leave gaps between panels rather than covering the whole wall.
What you need
SD SODOCT 24 Pack 2” Thick Pyramid Acoustic Foam
A 24-pack of 2-inch pyramid foam panels with 24 sq ft of coverage, flame retardant foam and a 6-month warranty.
- Thickness: 2 in
- Fire-rated
- Panels in pack: 24
- Material: Acoustic Foam
- 6-month warranty stated
TOUO 12 Pack Acoustic Panels
A 12-pack of 1-inch wedge foam panels with 60 pieces of double-sided adhesive tape and flame-resistant foam.
- Thickness: 1 in
- Fire-rated
- Panels in pack: 12
- Material: Foam
Knightsacoustic 50 Pack Sound Proof Foam Panels
A 50-pack of 2-inch wedge foam panels in high-density polyurethane foam, sold without adhesive.
- Thickness: 2 in
- Panels in pack: 50
- Material: Foam
Temgcuam 54 Pack Acoustic Foam Wall Panels
A 54-pack of 1-inch wedge foam panels with 270 adhesive pads for tool-free mounting on walls and ceilings.
- Panels in pack: 54, the most here
- Material: Acoustic Foam
These come from our ranked list Best Acoustic Foam, which compares them spec by spec.
Frequently asked questions
Do acoustic panels soundproof a room?
No. Soundproofing takes sealed construction, not foam panels.
What thickness of foam panel should I buy?
A 2-inch panel absorbs lower frequencies than a 1-inch panel, so thicker foam suits rooms where low frequencies linger.
Where should I put acoustic panels?
Put them on the walls beside and behind the listening position first, where sound reflects first. Add panels in the corners for low frequencies, and leave gaps between panels.
Ranked acoustic panels lists
More how-to guides
Product details come from each Amazon listing and can change. Check the listing before you buy.