A superconductor coating inclusive, tape-like electrical conductor and windings using such conductor for magnets and electrical machines, etc. Both microphones are connected to processing means which are arranged to compute an intelligibility value based on both microphones’ signals. Water above an arbitrary terrain can be represented without consuming an excessive amount of memory and compute power, while focusing simulation effort on the area near the surface of the water to produce accurate results. A buffering member is provided so that the vibrating member strikes the buffering member when the vibration amplitude of the vibrating member has exceeded a predetermined value in a resonance region around the resonance point of the vibrating member. The optical delay device may include two such multi-pass optical cells and a mirror that optically couples the two said multi-pass optical cells. By activating the input means of such an electronic label, the electronic label transmits a request signal for requesting a parts inventory related action via the bidirectional wireless interface and the access point to the remote inventory controller.