Data for B1 and B2 plotted in comparison to data from sighted participants split by session, distance and sound (i.e. data replotted as from Fig 3).

<p>Note that the plot for B1 has two results superimposed. For results of significance tests between sighted participants and B1 and B2 please see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0154868#pone.0154868.t002" target="_blank">Table 2</a>.</p

Scatterplots between individual acoustic variables and performance.

<p>Data from B1 and B2 are highlighted in the plots.</p

Performance split by session, distance and sound.

<p>Error bars represent SEM across participants. *** p<.001.</p

Acoustic features of clicks.

<p>For reference, features of clicks made by the loud speaker and computed using our methods are given in the top row. Values are means. Standard deviations are given in parenthesis. The last two columns are values of the Dissimilarity Measure (DM) based on differences between mouth clicks and the speaker clicks in terms of peak intensity (I), frequency (F) or duration (D).</p

Performance split by distance and sound.

<p>Error bars represent SEM across participants. ** p< .01; *** p<.001.</p

Synthetic click parameters for EE1, EE2, and EE3.

<p>Synthetic click parameters for EE1, EE2, and EE3.</p

Frequency content of clicks for all echolocators.

<p>Top: Averaged spectrograms; Middle: Averaged power spectral density (PSD) plots; shaded regions denote 1 SD around the average; Bottom: Waterfall plots showing a set of PSD estimates for a subset of clicks and the average PSD estimate (black line at back).</p

Illustrations of click waveforms.

<p>Illustrations of waveforms of three clicks for each of the three echolocators.</p

Click synthesis.

<p>Synthetic clicks plotted for EE1 (left), EE2 (middle), and EE3 (right) in the frequency-time-domain (top), frequency-domain (middle), and time-domain (bottom).</p

Directivity diagrams.

<p>Top row: Azimuth directivity diagrams for EE mouth-clicks at 40cm. Markers indicate average of measured data; shaded regions denote 1 SD around the average; red line is fit of a modified cardioid. Middle row: Azimuth directivity diagrams for EE mouth-clicks at 100cm. Symbol and colour coding as in top row. Bottom row: Elevation directivity diagrams for EE mouth-clicks. Markers indicate average of measured data; shaded regions denote 1 SD around the average.</p