The bandwidth, 
, or f1 to f2, of a damped oscillator is shown on a graph of energy versus frequency. The Q factor of the damped oscillator, or filter, is 
. The higher the Q, the narrower and ‘sharper’ the peak is. Higher Q indicates a lower rate of energy loss relative to the stored energy of the resonator; the oscillations die out more slowly. A pendulum suspended from a high-quality bearing, oscillating in air, has a High Q, while a pendulum immersed in oil has a low one. Resonators with High quality factors have low damping so that they ring longer.
, or f1 to f2, of a damped oscillator is shown on a graph of energy versus frequency. The Q factor of the damped oscillator, or filter, is . The higher the Q, the narrower and ‘sharper’ the peak is. Higher Q indicates a lower rate of energy loss relative to the stored energy of the resonator; the oscillations die out more slowly. A pendulum suspended from a high-quality bearing, oscillating in air, has a High Q, while a pendulum immersed in oil has a low one. Resonators with High quality factors have low damping so that they ring longer.