\documentclass{article}
\usepackage{tipa}
\usepackage{vowel}

\newcommand{\vowelbox}{\raise1ex\hbox to 2.5cm}
\newenvironment{texsrc}{\begin{minipage}[t]{7cm}}{\end{minipage}}

\begin{document}

\section{Drawing vowel diagrams}

\subsection{The {\tt vowel} environment}

The general format of the {\tt vowel} environment is as follows.

\medskip

\verb|\begin{vowel}[|{\it option\/}(,{\it option},...)\verb|]|

{\it commands for inputting vowels}

\verb|\end{vowel}|

\medskip

Options and commands for inputting vowels are explained below.

\subsection{The shapes of the diagram supported}

The default shape of the vowel diagram is the one used in the recent
IPA chart, as shown below.

\begin{center}
\begin{tabular}{ll}
  \begin{vowel}[t]
  \end{vowel} &
  \begin{minipage}[t]{5.5cm}
    \verb|\begin{vowel}|\\
    \verb|\end{vowel}|
  \end{minipage}
\end{tabular}
\end{center}

In this diagram, the bottom, back, and top sides are in the proportion
2:3:4, as was prescribed by Daniel Jones.

In order to change the shape of an diagram, specify the following
options.

\begin{itemize}\itemsep0pt
\item \texttt{plain}, \texttt{simple}, \texttt{standard},
  \texttt{ipanew} (=default)
\item \texttt{rectangle} \quad Draws a rectangular diagram.
\item \texttt{triangle} \quad Draws a triangular diagram.
\item \texttt{three} \quad Distinguishes only three levels of vowel
  height.
\end{itemize}

The first group of options are mutually exclusive, i.e.\ only one them
can be selected at a time.

\begin{center}
\begin{tabular}{ll}
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}|\\
    \verb|\end{vowel}|\\
    \emph{or}\\
    \verb|\begin{vowel}[ipanew]|\\
    \verb|\end{vowel}|}
  \end{minipage} &
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[plain]|\\
    \verb|\end{vowel}|}
  \end{minipage} \\
  \begin{vowel}[t]\end{vowel} &
  \begin{vowel}[t,plain]\end{vowel}
\end{tabular}

\begin{tabular}{ll}
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[simple]|\\
    \verb|\end{vowel}|}
  \end{minipage} &
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[standard]|\\
    \verb|\end{vowel}|}
  \end{minipage} \\
  \begin{vowel}[t,simple]\end{vowel} &
  \begin{vowel}[t,standard]\end{vowel}
\end{tabular}
\end{center}

Among the other options, \texttt{rectangle}
and \texttt{triangle} are mutually exclusive but each can be combined
with one of the options \texttt{plain}, \texttt{simple} or
\texttt{ipanew}. And the last option \texttt{three} can be combined
with one of the options \texttt{plain}, \texttt{simple} or
\texttt{ipanew}, and with one of the options \texttt{rectangle}
and \texttt{triangle}.

\begin{center}
\begin{tabular}{ll}
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[rectangle]|\\
    \verb|\end{vowel}|}
  \end{minipage} &
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[plain,rectangle]|\\
    \verb|\end{vowel}|}
  \end{minipage} \\
  \begin{vowel}[t,rectangle]\end{vowel} &
  \begin{vowel}[t,plain,rectangle]\end{vowel}
\end{tabular}

\begin{tabular}{ll}
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[simple,rectangle]|\\
    \verb|\end{vowel}|}
  \end{minipage} &
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[triangle]|\\
    \verb|\end{vowel}|}
  \end{minipage} \\
  \begin{vowel}[t,simple,rectangle]\end{vowel} &
  \begin{vowel}[t,triangle]\end{vowel}
\end{tabular}

\begin{tabular}{ll}
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[plain,triangle]|\\
    \verb|\end{vowel}|}
  \end{minipage} &
  \begin{minipage}[t]{5.5cm}{\small
    \verb|\begin{vowel}[simple,triangle]|\\
    \verb|\end{vowel}|}
  \end{minipage} \\
  \begin{vowel}[t,plain,triangle]\end{vowel} &
  \begin{vowel}[t,simple,triangle]\end{vowel}
\end{tabular}

\begin{tabular}{ll}
  \begin{minipage}[t]{5cm}{\small
    \verb|\begin{vowel}[simple,three]|\\
    \verb|\end{vowel}|}
  \end{minipage} &
  \begin{minipage}[t]{6cm}{\small
    \verb|\begin{vowel}[simple,triangle,three]|\\
    \verb|\end{vowel}|}
  \end{minipage} \\
  \begin{vowel}[t,simple,three]\end{vowel} &
  \hspace{.5cm}\begin{vowel}[t,simple,triangle,three]\end{vowel}
\end{tabular}
\end{center}


\subsection{Placing vowels on a diagram}

The following commands are prepared in order to place vowels in the
vowel diagram.

\begin{itemize}
  \item \verb+\putcvowel[l|r]{symbol}{+\emph{cardinal position}\verb+}+
  \item \verb+\putvowel[l|r]{symbol}{x}{y}+
\end{itemize}

The former command is used to place a vowel on a {\it cardinal
postion}, and the latter is used to place a vowel on a point specified
by {\it x} and {\it y}. In each case, an optional argument \verb|[l]|
or \verb|[r]| can be given, which specifies to put a symbol (usually a
dot) that indicates the point and a vowel is placed at the left or
right of the symbol.

The next table shows a diagram indicating the cardinal positions and
an example of a vowel diagram containing the \verb|\putcvowel| commands.

\begin{center}
\begin{tabular}{lll}
  \begin{vowel}[t]
    \putcvowel{\footnotesize 1}{1}\putcvowel{\footnotesize 2}{2}
    \putcvowel{\footnotesize 3}{3}\putcvowel{\footnotesize 4}{4}
    \putcvowel{\footnotesize 5}{5}\putcvowel{\footnotesize 6}{6}
    \putcvowel{\footnotesize 7}{7}\putcvowel{\footnotesize 8}{8}
    \putcvowel{\footnotesize 9}{9}\putcvowel{\footnotesize 10}{10}
    \putcvowel{\footnotesize 11}{11}\putcvowel{\footnotesize 12}{12}
    \putcvowel{\footnotesize 13}{13}\putcvowel{\footnotesize 14}{14}
    \putcvowel{\footnotesize 15}{15}\putcvowel{\footnotesize 16}{16}
  \end{vowel} &
  \begin{vowel}[t]
    \putcvowel{i}{1}\putcvowel{e}{2}
    \putcvowel{\textipa{E}}{3}\putcvowel{a}{4}
    \putcvowel{\textipa{6}}{5}\putcvowel{\textipa{O}}{6}
    \putcvowel{o}{7}\putcvowel{u}{8}
    \putcvowel{\textipa{1}}{9}\putcvowel{\textipa{9}}{10}
    \putcvowel{\textipa{@}}{11}\putcvowel{\textipa{3}}{12}
    \putcvowel{\textipa{I}}{13}\putcvowel{\textipa{U}}{14}
    \putcvowel{\textturna}{15}\putcvowel{\ae}{16}
  \end{vowel} &
    \begin{minipage}[t]{4cm}
{\footnotesize\begin{verbatim}
  \begin{vowel}
    \putcvowel{i}{1}
    \putcvowel{e}{2}
    \putcvowel{\textipa{E}}{3}
    \putcvowel{a}{4}
    ...
  \end{vowel}
\end{verbatim}}
    \end{minipage}
\end{tabular}
\end{center}

The cardinal positions from 1 through 8 are the same with the numbers
of cardinal vowels determined by Daniel Jones. And the remaining
numbers (from 9 through 16) are extended cardinal positions that are
used to indicate the positions of all the remaining vowels that appear 
in the recent IPA chart, having no relation to the Jonesian system of
cardinal vowels.


\subsection{Chnaging the size of a diagram}

The usual commands for changing the size of text fonts such as
\verb|\small|, \verb|\large|, \verb|\Large|, etc.\ can be used to
change the size of a vowel diagram. 

\begin{center}
\begin{tabular}{lll}
\begin{minipage}{3.2cm}
{\small\begin{verbatim}
{\small
\begin{vowel}
\putcvowel{i}{1}
...
\end{vowel}}
\end{verbatim}}
\end{minipage} &
\begin{minipage}{3.2cm}
{\small\begin{verbatim}
\begin{vowel}
\putcvowel{i}{1}
...
\end{vowel}
\end{verbatim}}
\end{minipage} &
\begin{minipage}{3.2cm}
{\small\begin{verbatim}
{\large
\begin{vowel}
\putcvowel{i}{1}
...
\end{vowel}}
\end{verbatim}}
\end{minipage} \\
  {\small \begin{vowel}
    \putcvowel{i}{1}\putcvowel{e}{2}
    \putcvowel{\textepsilon}{3}\putcvowel{a}{4}
    \putcvowel{\textscripta}{5}\putcvowel{\textopeno}{6}
    \putcvowel{o}{7}\putcvowel{u}{8}
  \end{vowel}} &
  \begin{vowel}
    \putcvowel{i}{1}\putcvowel{e}{2}
    \putcvowel{\textepsilon}{3}\putcvowel{a}{4}
    \putcvowel{\textscripta}{5}\putcvowel{\textopeno}{6}
    \putcvowel{o}{7}\putcvowel{u}{8}
  \end{vowel} &
    {\large \begin{vowel}
    \putcvowel{i}{1}\putcvowel{e}{2}
    \putcvowel{\textepsilon}{3}\putcvowel{a}{4}
    \putcvowel{\textscripta}{5}\putcvowel{\textopeno}{6}
    \putcvowel{o}{7}\putcvowel{u}{8}
  \end{vowel}}
\end{tabular}
\end{center}

It is also possible to change the size of a vowel symbol and the
size of a diagram independently. 

In order to change only the size of a vowel symbol, use the commands
such as \verb|\small|, \verb|\large|, etc.\ within the
\verb|\putcvowel| command.

And in order to change only the size of a diagram, give appropriate
values to the parameters \verb|\vowelhunit| and \verb|\vowelvunit|.
\verb|\vowelhunit| stands for the horizontal unit length, and
\verb|\vowelvunit| the vertical unit length.  By default both
\verb|\vowelhunit| and \verb|\vowelvunit| are equal to 2em. And if
only the former is modified by an user, the latter is automatically
adjusted to the same length.

\begin{quote}
\begin{tabular}{ll}
  \vowelbox{\hss
    \begin{vowel}[t]
      \putcvowel{i}{1}
      \putcvowel{\large e}{2}
      \putcvowel{\Large\textipa{E}}{3}
      \putcvowel{\huge a}{4}
    \end{vowel}} &
\begin{texsrc}
\begin{verbatim}
\begin{vowel}
\putcvowel{i}{1}
\putcvowel{\large e}{2}
\putcvowel{\Large\textipa{E}}{3}
\putcvowel{\huge a}{4}
\end{vowel}
\end{verbatim}
\end{texsrc}
\end{tabular}
\end{quote}

\begin{quote}
\begin{tabular}{ll}
  \vowelbox{\hss
    {\vowelhunit=1em
      \begin{vowel}[t]
        \putcvowel{i}{1}
        \putcvowel{e}{2}
        \putcvowel{\textipa{E}}{3}
        \putcvowel{a}{4}
      \end{vowel}}} &
\begin{texsrc}
\begin{verbatim}
{\vowelhunit=1em
\begin{vowel}
\putcvowel{i}{1}
...
\end{vowel}}
\end{verbatim}
\end{texsrc}
\end{tabular}
\end{quote}

\begin{quote}
\begin{tabular}{ll}
  \vowelbox{\hss
    {\vowelvunit=2.31em
      \begin{vowel}[t]
        \putcvowel{i}{1}
        \putcvowel{e}{2}
        \putcvowel{\textipa{E}}{3}
        \putcvowel{a}{4}
      \end{vowel}}} &
\begin{texsrc}
\begin{verbatim}
{\vowelvunit=2.31em
\begin{vowel}
\putcvowel{i}{1}
...
\end{vowel}}
\end{verbatim}
\end{texsrc}
\end{tabular}
\end{quote}

In the later works of Daniel Jones, it is reported that he had used
such a diagram that the angle of the upper-left corner is 60
degrees. In this case, the bottom, right, and top sides are in the
proportion of 2:\(\sqrt{12}\):4. %See Ashby.


%\end{document}



This is the following paragraph. This is the following paragraph.
This is the following paragraph. This is the following paragraph.
This is the preceding paragraph. This is the preceding paragraph.
This is the preceding paragraph. This is the preceding paragraph.

\def\testitem{\lower.08ex\hbox{$\bullet$}}
%\def\testitem{%
%  \hbox{\vbox{\offinterlineskip\hsize=1ex
%    \hrule
%    \hbox to 1ex {\vrule height 1ex depth 0pt width .4pt \hfil
%      \vrule height 1ex depth 0pt width .4pt}
%    \hrule}}}

{\vowelsep0pt
\begin{vowel}[plain]
  \putcvowel{\testitem}{1}
  \putcvowel{\testitem}{2}
  \putcvowel{\testitem}{3}
  \putcvowel{\testitem}{4}
  \putcvowel{\testitem}{5}
  \putcvowel{\testitem}{6}
  \putcvowel{\testitem}{7}
  \putcvowel{\testitem}{8}
  \putcvowel{\testitem}{9}
  \putcvowel{\testitem}{10}
  \putcvowel{\testitem}{11}
  \putcvowel{\testitem}{12}
  \putcvowel{\testitem}{13}
  \putcvowel{\testitem}{14}
\end{vowel}

\begin{vowel}[noerase]
  \putcvowel{\testitem}{1}
  \putcvowel{\testitem}{2}
  \putcvowel{\testitem}{3}
  \putcvowel{\testitem}{4}
  \putcvowel{\testitem}{5}
  \putcvowel{\testitem}{6}
  \putcvowel{\testitem}{7}
  \putcvowel{\testitem}{8}
  \putcvowel{\testitem}{9}
  \putcvowel{\testitem}{10}
  \putcvowel{\testitem}{11}
  \putcvowel{\testitem}{12}
  \putcvowel{\testitem}{13}
  \putcvowel{\testitem}{14}
\end{vowel}

\begin{vowel}[rectangle]
  \putcvowel{\testitem}{1}
  \putcvowel{\testitem}{2}
  \putcvowel{\testitem}{3}
  \putcvowel{\testitem}{4}
  \putcvowel{\testitem}{5}
  \putcvowel{\testitem}{6}
  \putcvowel{\testitem}{7}
  \putcvowel{\testitem}{8}
  \putcvowel{\testitem}{9}
  \putcvowel{\testitem}{10}
  \putcvowel{\testitem}{11}
  \putcvowel{\testitem}{12}
  \putcvowel{\testitem}{13}
  \putcvowel{\testitem}{14}
\end{vowel}
}

This is the following paragraph. This is the following paragraph.
This is the following paragraph. This is the following paragraph.

\begin{tabular}{lll}
\begin{vowel}
    \putvowel[l]{i}{0pt}{0pt}
    \putvowel[r]{y}{0pt}{0pt}
    \putcvowel[l]{e}{2}
    \putcvowel[r]{\o}{2}
    \putcvowel[l]{\textepsilon}{3}
    \putcvowel[r]{\oe}{3}
    \putcvowel[l]{a}{4}
    \putcvowel[r]{\textscoelig}{4}
    \putcvowel[l]{\textscripta}{5}
    \putcvowel[r]{\textturnscripta}{5}
    \putcvowel[l]{\textturnv}{6}
    \putcvowel[r]{\textopeno}{6}
    \putcvowel[l]{\textbaro}{7}
    \putcvowel[r]{o}{7}
    \putvowel[l]{\textturnm}{4\vowelhunit}{0pt}
    \putvowel[r]{u}{4\vowelhunit}{0pt}
    \putvowel[l]{\textbari}{2\vowelhunit}{0pt}
    \putvowel[r]{\textbaru}{2\vowelhunit}{0pt}
    \putcvowel{\textreve}{10}
    \putcvowel{\textschwa}{11}
    \putcvowel{\textrevepsilon}{12}
    \putcvowel{\textsci}{13}
    \putcvowel{\textupsilon}{14}
\end{vowel} &
\begin{vowel}[rectangle]
    \putvowel[l]{i}{0pt}{0pt}
    \putvowel[r]{y}{0pt}{0pt}
    \putcvowel[l]{e}{2}
    \putcvowel[r]{\o}{2}
    \putcvowel[l]{\textepsilon}{3}
    \putcvowel[r]{\oe}{3}
    \putcvowel[l]{a}{4}
    \putcvowel[r]{\textscoelig}{4}
    \putcvowel[l]{\textscripta}{5}
    \putcvowel[r]{\textturnscripta}{5}
    \putcvowel[l]{\textturnv}{6}
    \putcvowel[r]{\textopeno}{6}
    \putcvowel[l]{\textbaro}{7}
    \putcvowel[r]{o}{7}
    \putvowel[l]{\textturnm}{4\vowelhunit}{0pt}
    \putvowel[r]{u}{4\vowelhunit}{0pt}
    \putvowel[l]{\textbari}{2\vowelhunit}{0pt}
    \putvowel[r]{\textbaru}{2\vowelhunit}{0pt}
    \putcvowel{\textreve}{10}
    \putcvowel{\textschwa}{11}
    \putcvowel{\textrevepsilon}{12}
    \putcvowel{\textsci}{13}
    \putcvowel{\textupsilon}{14}
\end{vowel} &
\begin{vowel}
    \putcvowel[l]{o}{1}
    \putcvowel[r]{o}{1}
    \putcvowel[l]{o}{2}
    \putcvowel[r]{o}{2}
    \putcvowel[l]{o}{3}
    \putcvowel[r]{o}{3}
    \putcvowel[l]{o}{4}
    \putcvowel[r]{o}{4}
    \putcvowel[l]{o}{5}
    \putcvowel[r]{o}{5}
    \putcvowel[l]{o}{6}
    \putcvowel[r]{o}{6}
    \putcvowel[l]{o}{7}
    \putcvowel[r]{o}{7}
    \putcvowel[l]{o}{8}
    \putcvowel[r]{o}{8}
    \putcvowel[l]{o}{9}
    \putcvowel[r]{o}{9}
    \putcvowel{o}{10}
    \putcvowel{o}{11}
    \putcvowel{o}{12}
    \putcvowel{o}{13}
    \putcvowel{o}{14}
\end{vowel}
\end{tabular}

\end{document}