Acoustic Panel Thickness Guide
Updated Nov 13, 2026 · By 
Jonah Mercer · Editorial policy
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Acoustic panel thickness is the depth of the foam panel, and the panels here come in 1-inch and 2-inch thickness. A thicker panel absorbs more sound at lower frequencies, so thickness decides how much echo a panel removes from a room. Start by comparing the thickness in inches, then check the panel count and the coverage.
What thickness means
Thickness is the depth of the panel from the wall to the front face, measured in inches. The panels here measure 1 inch or 2 inches thick, and each panel covers 12 by 12 inches on the wall. A 2-inch panel holds more foam than a 1-inch panel in the same wall area. Check the thickness figure in inches before you buy, since the pack name and the panel size do not show it.
Compare 1-inch and 2-inch panels
The TOUO and the Temgcuam panels are 1 inch thick, and the SD SODOCT and the Knightsacoustic panels are 2 inches thick. A 1-inch panel suits a wall where depth matters, and a 2-inch panel suits a room where echo control matters more. The SD SODOCT panels use a pyramid shape, and the TOUO, Knightsacoustic and Temgcuam panels use a wedge shape. Compare the thickness and the shape before you choose.
Count the panels and the coverage
Panel count decides how much wall the pack covers. The TOUO pack holds 12 panels, the SD SODOCT pack holds 24 panels, the Knightsacoustic pack holds 50 panels, and the Temgcuam pack holds 54 panels. The SD SODOCT pack covers 24 square feet, and the Knightsacoustic pack covers 7200 square inches. Measure the wall area first, then match the pack count and the coverage to that area.
Check flame retardant foam and mounting
Flame retardant foam and mounting differ from pack to pack. The SD SODOCT and the TOUO panels are flame retardant, and the SD SODOCT panels carry a flame retardant certification. The TOUO pack includes 60 pieces of double-sided adhesive tape, and the Temgcuam pack includes 270 adhesive pads. The Knightsacoustic panels do not include adhesive, so buy adhesive separately if the pack has none.
What you need
SD SODOCT 24 Pack 2” Thick Pyramid Acoustic Foam
A 24-pack of 2-inch pyramid foam panels with 24 square feet of coverage, flame retardant certification 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 retardant 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 with 7200 square inches of coverage, 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 mounting on walls or 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
Is a 2-inch panel better than a 1-inch panel?
A 2-inch panel holds more foam than a 1-inch panel, so it absorbs more sound at lower frequencies. A 1-inch panel suits a wall where depth matters, so match the thickness to the room.
How many panels do I need for a wall?
Count the panels in the pack and the coverage it gives. The packs here hold 12, 24, 50 or 54 panels, so measure the wall area first and match the pack to that area.
Do these panels stop outside noise?
No. These panels absorb sound inside a room and reduce echo, and the SD SODOCT panels are not intended for full soundproofing or noise isolation from outside.
Ranked acoustic panels lists
More how-to guides
Product details come from each Amazon listing and can change. Check the listing before you buy.