The formation of attentional filters for a missing-fundamental complex tone and frequency-gliding tones

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In this study, we investigated the effect of pitch frequency in forming the attentional filters of complex tone and frequency-gliding tones in signal detection tasks. The attentional filters were measured at spectral regions where there is no real power or no power convergence on a single frequency. In Experiment I, the attentional filter around the missing-fundamental frequency was measured by the probe-signal method. The cue tone was a complex tone composed of 13 components from 1, 000 Hz up to 4, 000 Hz, whose fundamental frequency is 250 Hz. In Experiment II, we also investigated the formation of attentional filters in relation to frequency-gliding tonal cues. The frequency was changed from 925 Hz to 1, 075 Hz in an upward-frequency glide and from 1, 075 Hz to 925 Hz in a downward-frequency glide. The overall pitch was first measured by pitch-matching and the attentional filter was then measured around the overall pitch frequency. In conclusion, an attentional filter can be formed at the fundamental frequency region, where is no real power, and at the frequency corresponding to overall pitch of frequency-gliding tone.
社団法人日本音響学会の論文