The document discusses mobile audio practices and their implications for experiencing urban spaces. It describes how personal audio devices allow listeners to immerse themselves in private soundscapes while in public, potentially disconnecting from shared social experiences of the city. This represents a "radical auditory re-prioritization" of urban experience. The document also examines projects that use location-based audio to amplify spatial experiences or convey a place's auditory past, potentially helping listeners learn to get lost in cities as Benjamin advocated.