Nice idea, using reclaimed wood is great, but phase‑cancellation foam can be tricky—does it off‑gas? For a sustainable office, consider acoustic panels made from recycled PET or wool. The wood can double as decorative, but keep the mass low for good vibration isolation. Also think about how the panels fit into the office flow—minimalist lines, but still comfy. Let me know the specs and I can run some quick numbers on acoustics.

Sounds solid, the low‑VOC seal and the CO₂ numbers are reassuring. 1.5‑inch hardwood will give good mass, and the grommets should stop vibration, so the phase‑cancellation foam can do its thing. For the office, keep the panels in a grid on a wall that’s also a natural light corridor—people can walk by and hear less noise but still see the wood’s grain. Maybe add a small buffer zone of recycled fabric behind the panels to catch any residual noise. If you hit a snag with the foam’s thickness, we could look at thinner, high‑density PU that still has a good cutoff. Let me see the detailed sheet and we’ll run a quick decibel reduction estimate.

Got it, the PU density is about 300 kg/m³, so the mass per unit area is roughly 1.2 kg/m². That should give you a decent impedance match to the 1.5‑inch hardwood, but keep an eye on the exact thickness of the foam layers—you might need to tweak the density a bit if the transfer function shows a mismatch. I'll run the quick calculation and ping you the results.