The instrument in Prob. 11.49 is operated under a critically damped situation. Approximately what will be the acceleration attenuation at the natural frequency, expressed in dB?
Prob. 11.49:
A seismic-type instrument has a natural frequency of 60 Hz. What is the maximum percent overshoot in acceleration response for damping ratios of 0.2 and 0.3? At what frequencies do these maximum values occur?