A Filter functions of the left ear of one subject are plotted for the midline cone of confusion before and B after passing through a cochlear filter model. Filter functions for the left ear of a different subject are plotted for the midline (D,E,F Azimuth 0, cf. red line in (C)) and 40 ° off the midline (G,H,I Azimuth −40, ; cf. blue line in (C)) are plotted without moulds (D and G) and with moulds (E and H). The data have been smoothed, as above, using the cochlear filter model. The differences between the bare and mould conditions for both lateral angles are plotted in (F) and (I).