Figure 1
From: Spectral Weighting Underlies Perceived Sound Elevation
Color-coded HRTFs (amplitude spectra (1–16 kHz) between −15 dB (dark blue) and +20 dB (dark red)) as function of elevation for a typical human subject, with our high-contrast stimuli overlaid in black lines. NR: notch region (6–9 kHz); OR: outer region. Note the prominent elevation-dependent spectral notch (blue). Also, between 4–6 kHz spectral cues vary monotonically with elevation, albeit less strongly than in the NR. The cues above 9 kHz vary in a much more complex way with elevation. At the low frequencies, the ear-canal resonance around 2.5 kHz (red) is direction-independent.
