An amalgamation of an icon from the Tango! Desktop Project and a megaphone. Made in Adobe Illustrator
<a href="//commons.wikimedia.org/wiki/User:Penubag" title="User:Penubag">penubag</a>; <a rel="nofollow" class="external text" href="http://tango.freedesktop.org/The_People">The people from the Tango! project</a>.
CC BY-SA 2.5
Own work &amp; The <i><a rel="nofollow" class="external text" href="http://tango.freedesktop.org/Tango_Desktop_Project">Tango! Desktop Project</a></i>.