If the ossicles are stiff in their spring-like action, then they will vibrate well at high frequencies, but not at low frequencies. The resultant loss of amplitude at low frequencies constitutes low-frequency conductive hearing loss.
<a href="//commons.wikimedia.org/wiki/User:Mike.lifeguard" title="User:Mike.lifeguard">Mike.lifeguard</a>
2009-02-14 23:46
<span class="int-own-work" lang="en">Own work</span>