The invention relates to an oscillator comprising two resonators, the direction of the vector of acceleration sensitivity of at least one first resonator of the at least two resonators, said direction being relative to the mounting surface of said first oscillator, corresponding substantially to the reflected direction that is reflected by a mirror plane of the vector of acceleration sensitivity of at least one second resonator of the at least two resonators, said direction being relative to the mounting surface of said second oscillator. The invention also relates to an oscillator comprising two resonators, the oscillator comprising a resistor which is effectively connected in parallel with one of the resonators and the resistance value of which is less than a hundred times that of the series resonator resistance of the combined resonator at the desired resonant frequency.