Figure 4
From: Improved speech intelligibility in the presence of congruent vibrotactile speech input
Vibrometry thresholds. (a) Participants’ individual vibrotactile detection thresholds for the four different carrier frequencies, displayed on a logarithmic displacement scale in μm. Cochlear implant users are plotted in yellow, normal-hearing participants in blue. (b) Estimated detection thresholds for the incongruent tactile signal (consisting of all four frequencies mixed) displayed with the tactile signal amplitude (rms of signal waveform). During speech testing, all signals were sent with an rms of 0.1, indicated by the dashed lines.
