Figure 1.

Elevation components of head-saccades to broadband sounds presented in the 2D frontal hemifield (α ∈ [−90°, +90°] and ε ∈ [−55°, +80°]). Colour code: normalized response density around the regression line. (A) Normal hearing. Note the high response gain and constant variability across the response range. The response distribution around the regression line is approximately Gaussian (inset left). (B) Localisation immediately after inserting moulds in both pinnae. Data from one subject, for whom each mould produced a comparable ipsilateral localisation deficit in elevation (but see⁹ for a more comprehensive analysis). Although these responses have zero gain, their variance is similar as for normal broad-band hearing (see Discussion). The azimuth response components for both conditions had a high gain and low variability (not shown). Red shading: data probability around the optimal fit.