A practice room at Vienna Rehearsal Rooms for musicians in <a href="https://en.wikipedia.org/wiki/Vienna" class="extiw" title="en:Vienna">Vienna</a> / <a href="https://en.wikipedia.org/wiki/Austria" class="extiw" title="en:Austria">Austria</a> / <a href="https://en.wikipedia.org/wiki/European_Union" class="extiw" title="en:European Union">EU</a>. In the foreground a drum. A rear curtain of the sound insulation wall(Molleton for eg stages with special sound-damping properties and special requirements for fire protection).
<a href="//commons.wikimedia.org/wiki/User:Joadl" title="User:Joadl">Joadl</a>
CC BY-SA 3.0 at
<span class="int-own-work" lang="en">Own work</span>