Can you hear it?

With limited resorces this gives students an opportunity to test out "sound proofing"

You just need a table, paper clip, ruler and a selection of materials that may be useful in blocking out the noise from a noisy neighbour

Give the students as much guidance as you like or alternatively, as I prefer, just give them the limited resorces and tell them to devise a "fair" test.

Potential for discussion, competition and looking silly walking around with ear protectors made out of the winning material