A wearable personal audio system to audibly deliver audio information, even at a low volume level, to the wearer. The system includes an audio unit, and at least one miniature speaker, that are located within and suitably fixed to the article of clothing so as to be supported in an unseen manner. Each...http://www.google.es/patents/US20020090103?utm_source=gb-gplus-sharePatente US20020090103 - Personal wearable audio system
