The invention relates to a method for filtering information emitted, on the basis of pressure measurements taken by a pressure sensor mounted on a wheel of a vehicle equipped with a tire, to a central unit mounted on the vehicle. According to this method, a value representative of the pressure of the air in the tire is measured periodically, with a period .theta., and from this any possible variations .DELTA.P in pressure between the values of the pressures successively measured are deduced; in parallel, with the same period .theta., a value representative of the temperature of the air in the tire is measured. In addition, when there is a variation .DELTA.P in pressure between two measured pressure values, that is greater in terms of absolute value than a predetermined threshold Sp, the variation .DELTA.T between the two temperature values measured at the same instants as the measured pressures is calculated. The emission of a signal representative of a variation in pressure to the central unit is commanded only if the comparative change in the pressure and in the measured temperature might be representative of a variation of the amount of air in the tire.