i'm currently preparing some experiments about using Bluetooth in real life. And to make the data more vary, i need some materials that can really giving side effects to Bluetooth functionality. i've been trying simple test with concrete walls (~7 in) and wooden door (~3.5 cm) and they seems not giving significant change
after some research, i've found that Bluetooth use radio wave (https://en.wikipedia.org/wiki/Bluetooth), and after many search results later i only found this as the possible nearest explanation (How can I create hindrances to radio waves?) but they only explained conductive materials only
is there any material (other that conductive one, prefer common types that we usually found around) that can interrupt Bluetooth connectivity?