Let “voice range profile” (a.k.a, “phonetogram”) be the term for a graph of the maximum phonatory range of a voice on the fo×SPL plane, i.e., a closed contour. Let “voice map” be the term for a map of a scalar metric over some relevant range,not necessarily to the extremes, on that same plane, i.e., a 2D scalar field. For imaging several metrics, one voice map can have several “layers”, all derived from the same recording. This paradigm for collection and collation of voice data is useful, because it accounts for how the chosen metrics vary systematically with fo and SPL. Both fo and SPL are influential and typically nonlinear covariates of other voice metrics. Not accounting for them can obscure the effects of an intervention. Here we summarize some central concepts, rationales and techniques related to voice mapping.