Arrowzoom Pyramid 10/15cm Thick Acoustic Foam Series PRO - Black - KK1471 Sound Diffuser and scatters on many axes

and scatters on many axes — not one

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Ideal for uninsulated doors

Use a cordless rotary hammer to drill holes on the marked positions on the wall

STC 27 (most foam sellers won't publish numbers because they don't have them)

Arrowzoom Pyramid 10/15cm Thick Acoustic Foam Series PRO - Black - KK1471 Sound Diffuser and scatters on many axesQuiet your room in one afternoon KK1471 is Arrowzoom's Series PRO pyramid foam engineered for home studios, podcast rooms, drum rooms, and gaming setups where thin 2 foam doesn't cut it. With NRC 0. 92 across the speech and music bands, it absorbs reflections that cause echo, flutter, and that boxy "small room" sound. Pick the 4 (10cm) tile for vocals and speech, or step up to 6 (15cm) when you need to tame low mid bass build up. How acoustic foam