embodiment shown in fig1 will now be described the first resonator has an elastic constant k 1 5 u00b7 10 u2212 6 n m rad and an inertia i 1 16 u00b7 10 u2212 10 kg u00b7 m 2 which corresponds to a natural frequency f 1 9 2 hz the second resonator has an elastic constant k 2 1 u00b7 10 u2212 4 n m rad and an inertia of i 2 5 u00b7 10 u2212 10 kg u00b7 m 2 which corresponds to a natural frequency of f 2 71 hz when the two resonators are mechanically coupled the value of coupling constant u201c k c u201d depends upon the shape of the foot that joins the two resonators this coupling frequency was made to vary between the values 1 u00b7 10 u2212 8 and 1 u00b7 10 u2212 4 and is shown in fig4 with a logarithmic scale of the natural frequencies of the coupled system as can be seen frequencies f 1 and f 2 are influenced by the variation in coupling coefficient k c the graph of fig5 shows as a function of a variation in coupling coefficient k c within the aforementioned limits a study of interference in the first resonator due for example to a shock i e a comparison of the effect of the interference on the first resonator frequency variation.