Audiobooks and Cognitive Load

I saw this presentation at E-Learn 2008. It was good to see something that made sense for actual teaching and had some new insight on using media for learning.
This is the abstract:
Abstract:
Cognitive load theory (CLT) has been the theoretical framework for much of the research into multimedia learning over the past fifteen years. CLT is especially useful for understanding why meaningful learning is difficult to achieve. The inherent problem of achieving meaningful learning in any field can be understood in relation to the very limited processing capacity of working memory. CLT posits that working memory capacity can be explained by three different types of processing demands: intrinsic, extrinsic and germane load. In this article, the authors propose a model for understanding how audiobook learning packages (ALPs) can be effective in maximizing working memory capacity through efficient management of the three types of cognitive load. The model proposes five potential approaches to manage cognitive load for learners: focus, convenience, scaffolding, self-regulation and active learning.

Additionally the author has posted some more information regarding the tools used in creating audiobooks.