Results of the pure tone audiometry for the hearing threshold (HT) and uncomfortable loudness level (UCL) of the 24 hearing-impaired (a) and 20 normal-hearing subjects (b). For the hearing-impaired subjects, also the HT of type N3 according to IEC 60118-15 is plotted. The error bars indicate plus/minus one standard deviation. For some measurements with the hearing-impaired subjects, the audiometer limit of 120 dB HL was reached and those values are omitted in the plot of the individual data as well as for the computation of the mean values. Overall, data of two subjects for the HTs and data of five subjects for the UCLs were affected.