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?
Best Answer
Such a material (apart from conductive ones) typically doesn't exist. The reason: when a material is interrupting bluetooth, it's either reflecting or absorbing the radio wave. Reflective materials are also absorptive materials, so this comes down to finding a material that absorbs radio waves.
For metals and other conductive materials, electrons are very mobile, and act as the absorbers. For non-conductive materials, absorption tends to be a quantum phenomena. The energy of a single photon must be the same as the transition energy from a quantum base state to an excited state. These energies tend to be much higher than the energy of a radio frequency photon, meaning you won't find any material that absorbs radio waves that isn't also conductive.
Your best bet is either a metal or a thick partially conductive ceramic to block the bluetooth. Concrete is one example, but you'd need a very thick piece. You'd also have to ensure that the concrete is large enough such that the wave won't refract around it.