Following the solution given in this thread, I am using
Code: Select all
\renewcommand{\nomlabel}[1]{\smash{\parbox[t]{1.5cm}{#1}}\hfil}
\nomgroup
(see below).
Code: Select all
\documentclass{article}
\usepackage{ifthen}
\usepackage{calc}
\usepackage[noprefix]{nomencl}
% Configure title of groups
\newcommand{\bfdz}[1]{\bf\fontsize{12}{14}\selectfont #1}
\newcommand{\meru}[1]{\rule[2pt]{\textwidth-(\widthof{#1})}{.5pt}}
% Enable two line label
\renewcommand{\nomlabel}[1]{\smash{\parbox[t]{1.5cm}{#1}}\hfil}
% Create Groups
\renewcommand{\nomgroup}[1]{%
\ifthenelse{\equal{#1}{A}}{\vspace{5mm} \item[\bfdz General Symbols] \meru{\bfdz General Symbols~~}}{%
\ifthenelse{\equal{#1}{G}}{\vspace{5mm} \item[\bfdz Greek Symbols] \meru{\bfdz Greek Symbols~~}}{}}}
\makenomenclature
\begin{document}
\printnomenclature[1.5cm]
\nomenclature[A]{$p(r_m,t)$, $p_m(t)$}{Received signal at the $m^{th}$ microphone\nomrefpage}%{}{}
\nomenclature[G]{$\Delta t_{\vec{x}}$}{Emission time delay at focus point $\vec{x}$, $\Delta t_{\vec{x}}=r_{\vec{x}} / c$\nomrefpage}%{}{}
\end{document}
Thanks,
Will