A dictation system is formed of two personal computers connected by an e-mail system. The determined wheel speeds which enter in the transversal acceleration value are corrected by vehicle wheels in a tolerance balance module of the wheels when a dynamic tire radius in one of the vehicle wheels diverges from a tire radius given in an optimum tire geometry. The buffer may use a write pointer and a read pointer which may be clocked by two different clocks allowing independent write and read accesses to the buffer. The combination of short duration wavelets and encoding techniques are used to spread the signal energy over a an ultra wide frequency band such that the energy is not concentrated in any particular narrow band and is not detected by conventional narrow band receivers so it does not interfere with those communication systems. The invention also relates to a seat for a passenger vehicle and, more particularly, an aircraft, the pivotal rotation of which is provided with such a device. With feedback from the output of through, the gain and any offset of is divided down by the gain of.