what does high Q(quality factor) value represent?

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what does high Q(quality factor) value represent?..

Answer / haris.k.a

* A system with high quality factor (Q > ½) is said to
be underdamped. Underdamped systems combine oscillation at a
specific frequency with a decay of the amplitude of the
signal. Underdamped systems with a low quality factor (a
little above Q = ½) may oscillate only once or a few times
before dying out. As the quality factor increases, the
relative amount of damping decreases. A high-quality bell
rings with a single pure tone for a very long time after
being struck. A purely oscillatory system, such as a bell
that rings forever, has an infinite quality factor. More
generally, the output of a second-order low-pass filter with
a very high quality factor responds to a step input by
quickly rising above, oscillating around, and eventually
converging to a steady-state value.

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what does high Q(quality factor) value represent?..

Answer / srallanki

Higher Q indicates a lower rate of energy loss relative to
the stored energy of the oscillator; 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. Oscillators with high quality
factors have low damping so that they ring longer.

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