Question

the rate of decay of oscillations is known as

Answer 1

damping coefficient...

Answer 2

Logarithmic decrement

Logarithmic decrement is utilized to track down the damping proportion of an underdamped framework in the time-space. The technique for logarithmic decrement turns out to be less and less exact as the damping proportion increments past around 0.5; it doesn't have any significant bearing whatsoever for a damping proportion more noteworthy than 1.0 in light of the fact that the framework is overdamped. The logarithmic decrement is characterized as the regular log of the proportion of the amplitudes of any two progressive pinnacles.