foot wide hexagonal and smaller triangular felt sound tiles arranged up the corner of a room in overlapping but still mostly tiling 3D method, in white black and two shades of grey. Below, the limb of a monitor and speaker on a desk.
https://mastodon.triggerphra.se/system/media_attachments/files/112/081/422/625/918/905/original/20c2bd61759c0b5a.jpeg