Model configurations and numeric results. Middle ear: Details of frequency response of the middle-ear filters. Cochlear filter bank: 40 dB and 100 dB refer to filter characteristics between 160 and 8000 Hz in response to white noises of 40 and 100 dB SPL, respectively. IHC: Parameters and frequency response of the LP filter structures. Subcortical processing: Theoretical and estimated BMF of the modulation filter with the closest BMF to 100 Hz and peak-to-peak amplitude of the simulated IC outputs in response to 70-dB-peSPL clicks of positive (A) and negative (−A) (see Sect. 4.4 for more details). Performance: Time required to process a 1-s long stimulus using each of the selected auditory models, between Stages 1 and 6 (Fig. 2). All fcut-off in this table were measured at the −3 dB points of the amplitude spectrum.
|Passband gain in Fig. 3 (dB)||–||−6.0||24.0||18.0||−6.0||–||−66.9||0.00|
|Lower fcut-off (Hz)||–||577.6||601.0||601.1||577.6||–||474.8||474.8|
|Higher fcut-off (Hz)||–||6061.9||2995.3||3993.1||6061.9||–||1230.2||1230.2|
|Cochlear filter bank|
|Reference gain in Figs. 4–5 (dB)||−0.6||−44.1||−77.9||−101.9||−44.1||−43.9||26.9||−1.9|
|40 dB: Number of filters||34||51||59||52||51||34||36||34|
|40 dB: Average filter bandwidth (ERB)||0.903||0.588||0.505||0.579||0.588||0.904||0.848||0.905|
|100 dB: Number of filters||34||20||12||15||20||33||27||34|
|100 dB: Average filter bandwidth (ERB)||0.903||1.57||3.046||2.299||1.57||0.925||1.147||0.905|
|Number of filter sections||1||7||1||–||7||1||1||5|
|Order of each filter section||1||1||2||–||1||1||2||1|
|fcut-off of each filter section (Hz)||1000||3000||1000||–||3000||1000||1000||2000|
|fcut-off of the total filter structure (Hz)||1000||966||642||–||966||1000||1000||771|
|Theoretical BMF (Hz)||77.2||85.4||82.4||82.4||85.4||94.0||77.2||77.2|
|Estimated BMF from Fig. 14a (Hz)||70||35||45||60||45||65||70||70|
|Unit of the amplitude||MU||spikes/s||μV||μV||spikes/s||a.u.||MU||MU|
|Click of amplitude A||407.3||116.5||0.245||0.401||117.6||1.64 · 10−4||423.1||155.9|
|Click of amplitude −A||437.4||115.8||0.237||0.407||117.3||1.67 · 10−4||408.9||157.3|
|Total time (s)||0.80||86.6||122.9||319.5||163.1||1.86||7.70||0.622|
|Number of cochlear channels||31||66||401||401||66||31||60||31|
|Time per channel (s)||0.026||1.31||0.306||0.797||2.47||0.060||0.128||0.020|
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