A connector assembly (22) includes a first side connector (26) and a second side connector (28). The first side connector (26) includes a first protective housing (32), a first inductor including a first end face (36), and a first physical connector elemen...

A tire pressure decrease detection apparatus comprising: rotation speed information detection means, rotation acceleration information calculation means, resonance frequency estimate means for time-series estimating a torsional resonance frequency of the r...