Embodied sound design is a process of sound creation that involves the designer's vocal apparatus and gestures. The possibilities of vocal sketching were investigated by means of an art installation. An artist-designer interpreted several vocal self-portraits and rendered the corresponding synthetic sketches by using physics-based and concatenative sound synthesis. Both synthesis techniques afforded a broad range of artificial sound objects, from concrete to abstract, all derived from natural vocalisations. The vocal-to-synthetic transformation process was then automated in SEeD, a tool allowing to set and play interactively with physics-or corpus-based sound models. The voice-driven process and tool, developed and evaluated through design exercises, show how an embodied sound sketching system can work in supporting the externalisation of sonic concepts.