\documentclass{article}
\begin{document}

\begin{table}
\begin{center}
  \caption{Correct matches for each octave using detail coefficients}
  \vspace{0.2in}
  \begin{tabular}{|c|c|c|c|c|c|}
     \hline
 & Octave 1 & Octave 2 & Octave 3 & Octave 4 & Octave 5 \\
 & Detail & Detail & Detail & Detail & Detail \\
     \hline
Clipped & &   &   &   &  \\
'a'  & 2 & 2 & 3 & 2 & 0 \\
'e'  & 0 & 0 & 0 & 2 & 2 \\
'i'  & 3 & 2 & 2 & 1 & 1 \\
'o'  & 3 & 3 & 3 & 3 & 2 \\
'uu' & 1 & 4 & 2 & 2 & 3 \\
     \hline
Extended & &   &   &   &  \\
'er'  & 1 & 0 & 1 & 2 & 0 \\
'ee'  & 1 & 0 & 3 & 1 & 0 \\
'uh'  & 0 & 2 & 3 & 2 & 4 \\
'oo'  & 1 & 1 & 1 & 3 & 1 \\
     \hline
Dipthong & &   &   &   &  \\
'ai'  & 4 & 0 & 0 & 0 & 0 \\
'ay'  & 1 & 2 & 3 & 4 & 1 \\
'oe'  & 1 & 2 & 2 & 1 & 0 \\
'ow'  & 0 & 0 & 2 & 1 & 2 \\
     \hline
  \end{tabular}
  \label{tab:detail_results}
\end{center}
\end{table}

\end{document}