How can an oscillator’s microphonic responses be reduced?
Use NP0 capacitors
Reduce noise on the oscillator’s power supply
Increase the gain
Mechanically isolate the oscillator circuitry from its enclosure✓Bonne réponse
Explication
Because microphonics originate in mechanical vibration reaching the frequency-determining parts, the remedy is mechanical: isolate or shock-mount the oscillator assembly from the enclosure and build it rigidly so vibration cannot move the components.