the present disclosure relates to a method of adjusting the resonance frequency of a vibrating element , comprising measuring the resonance frequency of the vibrating element , determining , using abacuses and as a function of the resonance frequency measured , a dimension and a position of at least one area of modified thickness to be formed on the vibrating element so that the resonance frequency thereof corresponds to a setpoint frequency , and forming on the vibrating element , an area of modified thickness of the determined dimension and position .