resonance curve, vertical: amplitude magnification factor, horizontal: frequency ratio, various input frequencies and DVA's mass ratios  (dynamic vibration absorber without damping)
<a href="//commons.wikimedia.org/wiki/User:Yapparina" title="User:Yapparina">Yapparina</a>
2014-05-06 18:07:34
<span class="int-own-work" lang="en">Own work</span>