Vielleicht gefällt jemandem ja diese Variante.
## Code
\documentclass[tikz,convert=false]{standalone}
\documentclass[tikz,convert]{standalone}
\usetikzlibrary{shapes.arrows,calc,decorations.pathmorphing}
\begin{document}
\begin{tikzpicture}[nodes=draw]
\begin{tikzpicture}%[nodes=draw]
\node[outer sep=5pt] sep=5pt, anchor=base] (x) {Sender};
\node[outer sep=5pt] sep=5pt, anchor=base] at (4.8,0) (y) {Empf\"anger};
\path let \p0=($(y.west)-(x.east)$) in
(x) --
node [
pos=.5,
auto=false,
shape=single arrow,
anchor=tail,
draw=none,
% line join=round,
xshift=-veclen(\p0)/2,
minimum height=veclen(\p0)-\pgfkeysvalueof{/pgf/outer xsep},
fill=yellow!90!black,
decorate, decoration={
name=random steps,
segment length=+.5pt,
amplitude=.5pt}
] {St\"orung}
(y);
\end{tikzpicture}
\end{document}
## Output
![alt text][1]
[1]: http://texwelt.de/wissen/upfiles/de77-0.pnghttp://texwelt.de/wissen/upfiles/de77-0_1.png
