In panel (a), the C-weighted peak sound pressure levels of all impulse signals for the settings FTS+CR, FTS+OL, FTS+NRSE, and FTS+INR relative to the values of setting FTS (∆L_Cpeak) are plotted (for the measurements without speech). In panel (b), the C-weighted sound pressure levels (no peak) during the 7 s long speech signal before the impulse signals for the settings FTS+CR, FTS+OL, FTS+NRSE, and FTS+INR relative to the values of setting FTS (∆L_C) are plotted for the signal keychain dropped (for the measurements with speech). In both panels the data of HA2 for the settings FTS+CR and FTS+OL were excluded, because CR was coupled with the settings of the OL so that the individual programming of each feature in the fitting software was not possible. For both plots, the average across repetitions and ears of the HATS are considered.