👉 In physics, a "frigidoreceptor" is a type of resonator in which the frequency of oscillation depends on the amplitude of the applied voltage. This property can be useful for applications where the energy or power required to generate the oscillations is limited by the available electrical source. Frictionless oscillators are those that do not experience any friction, while frictionless oscillators can have a frictional resistance that varies with the frequency of oscillation.