An electronic module, comprises: a circuit board; a piezoelectric device having a lid, the piezoelectric device being mounted on the circuit board; and an electronic component mounted on the circuit board. The system includes a processor driven controller unit programmed to control a selected device in dependence on generally contemporaneous aural and optical signals. The topmost conductive layer is disposed on the interlayer insulating layer in the cell array region. In one example, the hash values are concatenated and encrypted with a private key to generate the common signature value. and about 50% relative humidity for at least 15 hours. The mesh is made of a loop-type Velcro\xae material or the like which allows the mesh to be releasably engaged and disengaged from the hook-type material carried by the tacks so that the mesh can be appropriately positioned over the tissue.