quality factor - definition. What is quality factor
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DIMENSIONLESS MEASURE FOR THE DAMPING OF AN OSCILLATOR
Quality factor; Resonance width; Quality Factor; Q-factor; Q Factor
  •  A damped oscillation.  A low Q factor – about 5 here – means the oscillation dies out rapidly.

Q factor         
In physics and engineering, the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. It is defined as the ratio of the initial energy stored in the resonator to the energy lost in one radian of the cycle of oscillation.
HMS Quality (G62)         
  • HMAS ''Quality'' during her short RAN service
1941 Q AND R-CLASS DESTROYER
HMAS Quality (G62); HMS Quality; HMAS Quality
HMS Quality (G62/D18) was a Q-class destroyer built for the Royal Navy. Entering service in 1942, the destroyer served in several theatres of World War II.
Sound quality         
ASSESSMENT OF THE AUDIO OUTPUT FROM AN ELECTRONIC DEVICE
Sound Quality; Audio quality; Delivered Audio Quality
Sound quality is typically an assessment of the accuracy, fidelity, or intelligibility of audio output from an electronic device. Quality can be measured objectively, such as when tools are used to gauge the accuracy with which the device reproduces an original sound; or it can be measured subjectively, such as when human listeners respond to the sound or gauge its perceived similarity to another sound.

ويكيبيديا

Q factor

In physics and engineering, the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is. It is defined as the ratio of the initial energy stored in the resonator to the energy lost in one radian of the cycle of oscillation. Q factor is alternatively defined as the ratio of a resonator's centre frequency to its bandwidth when subject to an oscillating driving force. These two definitions give numerically similar, but not identical, results. Higher Q indicates a lower rate of energy loss and 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 or vibrate longer.