This document provides an outline for a presentation or paper focusing on sound in public spaces and headphone usage. It begins with introducing the topic and outlines the following structure: background and influences, key themes to be discussed, examples of interdisciplinary projects, and ideas for future research. The themes involve behavior, objects like headphones, language and systems of sound, and the reconfiguration of public and private spaces through personal audio devices. The document provides several quotes analyzing the social and aesthetic impacts of headphones and personal stereos.