\begin{tikzpicture}
\begin{axis}[%
name=speech,
axis lines*=middle,
xlabel=$t$,
ylabel=$x(t)$,
scale only axis,
axis on top,
%separate axis lines,
% every outer x axis line/.append style={white!15!black},
% every x tick label/.append style={font=\color{white!15!black}},
xmin=3364,
xmax=10100,
ytick=\empty,
xtick=\empty,
axis line style={->,>=stealth},
every axis x label/.style={
	at={(ticklabel* cs:0.97)},
	anchor=north,
},
every axis y label/.style={
	at={(ticklabel* cs:1)},
	anchor=south,
},
every axis y label/.style={at=(current axis.above origin),anchor=south},
%every axis x label/.style={at=(current axis.right of origin),anchor=west},
ymin=-1,
ymax=1,
]
\addplot [line width = 1.5pt, color=blue2!90] table [x={time}, y={sound}] {figs/speech_data.dat};
\end{axis}

\onslide<2|handout:1>{
\begin{axis}[
at=(speech.east), %anchor=east,
anchor=origin,
%at={(1200,380)},
xmin=-5,
xmax=5,
width=3.5in,
height=2in,
no markers,
rotate around={-90:(current axis.origin)}, % Rotate around the origin
axis lines*=center,
every axis y label/.style={at=(current axis.above origin),anchor=south},
every axis x label/.style={at=(current axis.right of origin),anchor=west},
%height=5cm, width=8cm,
xtick=\empty,
ymin=0,
ymax=0.6,
ytick=\empty,
xlabel=$x$,
ylabel=$p_{x(t)}(x)$,
enlargelimits=false, clip=false, axis on top,
grid = major,
axis line style={->,>=stealth},
every axis x label/.style={
	at={(ticklabel* cs:0)},
	xshift=0.3cm,
	anchor=north,
},
every axis y label/.style={
	at={(ticklabel* cs:1)},
	anchor=south,
},
x dir=reverse,
]
\addplot [very thick,black, fill=blue2!70,domain=-5:5, samples=101, clip=true] {laplacian(0,0.9)};
\node at (axis cs: 3, 0.5) {$\displaystyle p_{x(t)}(x) = \frac{1}{2b}\exp\bigg(-\frac{|x-\mu|}{b}\bigg)$};
\node[text width=3.5cm, align=center] at (axis cs: -1.5, 0.5) {Estimated probability density function};
\end{axis}
}
\end{tikzpicture}%