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Filter bank responses to pure tones at 500 Hz and 4000 Hz (top two rows) and spectral magnitudes of single-channel responses to white noises (bottom two rows) for sounds of 40-, 70-, or 100-dB SPL (bottom-to-top coloured curves, respectively). In the first two rows, the responses represent excitation patterns at the simulated CFs. The coloured markers indicate the amplitudes at the (off-frequency) CFs one ERBN below (grey) and one ERBN above (yellow or orange) the on-frequency CF (502 or 4013 Hz). These markers are highlighted using the same colours in Figure 5. In the third and fourth rows, the average FFT response of two cochlear-filters (CFs of 502 Hz or 4013 Hz) in response to six 500-ms white noise sections are shown in grey, and the corresponding smoothed responses are shown in colour. This type of responses was used to assess the quality factors of Figure 6. The dashed black lines indicate the corresponding −3-dB filter bandwidths. All responses were shifted vertically by the reference gains given in Table 2 (see the text for details). Literature: Figure 1A from , Figure 2C–E from , and Figure 2 from .
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