Emergence of a travelling wave on the BM due to a sinusoidally varying sound wave vibrating stapes (OW: oval window, RW: round window, ST: scala tympani, SV: scala vestibuli, H: helicotrema, BM: basilar membrane).
<ul><li><a href="//commons.wikimedia.org/wiki/File:Schematic_uncoiled_cochlea.png" title="File:Schematic uncoiled cochlea.png">Schematic_uncoiled_cochlea.png</a>: Kern A, Heid C, Steeb W-H, Stoop N, Stoop R</li>
<li>derivative work:  <b>— <a href="//commons.wikimedia.org/wiki/User:Mike.lifeguard" title="User:Mike.lifeguard"><b style="color:#309;">Mike</b></a>.<a href="//commons.wikimedia.org/wiki/User_talk:Mike.lifeguard" title="User talk:Mike.lifeguard"><b style="color:#309;">lifeguard</b></a></b></li></ul>
CC BY 2.5
<ul><li><a href="//commons.wikimedia.org/wiki/File:Schematic_uncoiled_cochlea.png" title="File:Schematic uncoiled cochlea.png">Schematic_uncoiled_cochlea.png</a></li></ul>