Sketch-thinking in the design domain is a complex representational
activity, emerging from the reflective conversation with the
sketch. A recent line of research on computational support for
sound design has been focusing on the exploitation of voice, and
especially vocal imitations, as effective representation strategy for
the early stage of the design process. A set of introductory exercises
on vocal sketching, to probe the communication effectiveness of vocal imitations for design purposes, are presented and discussed, in the scope of the research-through-design workshop activities of the EU project SkAT-VG.