Box plots showing the perception accuracy of HINT sentences in speech-shaped noise (SSN) and four-talker babble (FTB) in four voice conditions (L_foL_VTR, L_foH_VTR, H_foH_VTR, and H_foL_VTR) at three signal-to-noise ratios (SNRs) of −3, 0, and +3 dB. In each condition, the box represents the 25th and 75th percentiles of the performance, the notch represents the median, and the whiskers represent the range. Outliers are plotted with filled symbols.