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% Title of paper
\title{Heirarchical processing in natural hearing (working title)}

% List of authors, with corresponding author marked by asterisk
\author{
  KELAND MOORE\footnote{To whom correspondence should be addressed.} \and JAMES TRAER\\
  % Author addresses
  \textit{Department of Psychological and Brain Science}\\
  \textit{University of Iowa, 340 Iowa Ave, Iowa City, IA, USA}\\
  % E-mail address for correspondence
  keland-moore@uiowa.edu\\james-traer@uiowa.edu
}
\date{\today}
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\begin{document}
\maketitle

\begin{abstract}
{Abstract here}
{Key words here; and here; and here.}
\end{abstract}

\section{TODO}
\begin{enumerate}
  \item Decide on a title:
    \begin{itemize}
    \item Hearing a structured world
    \item Hearing a structured world with heirarchical processing
    \item Hearing heirarchical structure in the world
    \item Hearing the world with heirarchical processing
    \item Hierarchical processing in ecological auditory inference
    \end{itemize}
  \item Draft introduction
    \begin{itemize}
    \item outline story we want to tell
    \item add important references 
    \end{itemize}
  \item Outline methods
  \item Get data and draft preliminary figures
\end{enumerate}

% \pagebreak

\section{Introduction}
\label{sec1}

Sounds unfold over time and contain information that may not reveal itself simultaneously. Acoustic cues for speech are incrementalized and embedded in varying timescales, requiring listeners to aggregate prior features with anticipated ones.

We hypothesize that environmental sound processing is organized in an analogous fashion to that of speech processing. Information regarding material, size, shape, and identity of an environmental sound source may also be embedded in the signal at varied timescales/temporal groupings, or processed at varying levels of the environmental sound processing hierarchy.

We have designed an experiment in which participants will be asked to identify physical properties of sound source objects by listening to sound clips of varying durations. The experiment will probe the participant's ability to accurately infer certain physical properties when presented with sparse temporally relevant information.

Temporal groupings in sound are important features and are heavily relied upon in language processing. We have added 'clattering' sounds to our stimuli list in order to observe how changes in sound duration affect temporal groupings in these 'clattering' sounds. Furthermore, we are interested in how these temporal groupings can aid in the accurate inference of an object's physical properties and identity.

Many relevant cues from speech research have been identified and have been used to corroborate the existing hierarchical organization of language processing; this hierarchy includes phonemes, words, phrases, and sentences. To our knowledge there has been no such analog in environmental sound literature. This experiment may also provide insight in to the nature of acoustic cues present in environmental sounds and at what timescales these cues are being dynamically processed by the brain. The use of 'clattering' stimuli may prove useful in parsing out relevant temporal structure embedded in environmental sounds.

\section{Methods}
\label{sec2}


\section{Results}
\label{sec3}



\section{Discussion}
\label{sec4}



\section{Software}
\label{sec5}



\section{Supplementary Material}
\label{sec6}


\section*{Acknowledgments}



\end{document}
