An assembly for mobile electronic devices enhances audio by shaping the direction of emitted waves. Such a wave-shaping assembly is retractable so as to be flush or nearly flush with a surface of a mobile electronic device, and is extendable for playing audio to a listener more than a certain distance away from the mobile device. The wave-shaping assembly is suitable for voice, music, and other audible sound effects. The length and width of the extension of the wave-shaping assembly is variable, depending on the application and the industrial design of the mobile electronic device. The wave-shaping assembly is included either as a feature at time of manufacture, or as an added, optional attachment to a mobile electronic device.