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C. Gribben, and H. Lee, "The Frequency and Loudspeaker-Azimuth Dependencies of Vertical Interchannel Decorrelation on the Vertical Spread of an Auditory Image," J. Audio Eng. Soc., vol. 66, no. 7/8, pp. 537-555, (2018 July.). doi: https://doi.org/10.17743/jaes.2018.0040 C. Gribben, and H. Lee, "The Frequency and Loudspeaker-Azimuth Dependencies of Vertical Interchannel Decorrelation on the Vertical Spread of an Auditory Image," J. Audio Eng. Soc., vol. 66 Issue 7/8 pp. 537-555, (2018 July.). doi: https://doi.org/10.17743/jaes.2018.0040
Abstract: In horizontal stereophony, it is known that interchannel correlation relates to the horizontal spread of a phantom auditory image. However, little is known about the perceptual effect of interchannel correlation on vertical image spread (VIS) between two vertically-arranged loudspeakers. The present study investigates this through two subjective experiments: 1) a multiple comparison of relative VIS for stimuli with varying degrees of correlation; and 2) the absolute measurement of upper and lower VIS boundaries for extreme stimuli conditions. Octave-band (center frequencies: 63 Hz to 16 kHz) and broadband pink noise signals have been decorrelated using two techniques: all-pass filtering and complementary comb-filtering. These stimuli were presented from vertically-spaced loudspeaker pairs at three azimuth angles (0°, ±30°, and ±110°), with each angle assessed discretely. Both the relative and absolute test results show no significant effect of vertical correlation on VIS for the 63 Hz, 125 Hz, and 250 Hz bands. For the 500 Hz band and above, there is a general tendency for VIS to increase as correlation decreases, which is observed for both decorrelation methods.

@article{gribben2018the,
author={gribben, christopher and lee, hyunkook},
journal={journal of the audio engineering society},
title={the frequency and loudspeaker-azimuth dependencies of vertical interchannel decorrelation on the vertical spread of an auditory image},
year={2018},
volume={66},
number={7/8},
pages={537-555},
doi={https://doi.org/10.17743/jaes.2018.0040},
month={july},} @article{gribben2018the,
author={gribben, christopher and lee, hyunkook},
journal={journal of the audio engineering society},
title={the frequency and loudspeaker-azimuth dependencies of vertical interchannel decorrelation on the vertical spread of an auditory image},
year={2018},
volume={66},
number={7/8},
pages={537-555},
doi={https://doi.org/10.17743/jaes.2018.0040},
month={july},
abstract={in horizontal stereophony, it is known that interchannel correlation relates to the horizontal spread of a phantom auditory image. however, little is known about the perceptual effect of interchannel correlation on vertical image spread (vis) between two vertically-arranged loudspeakers. the present study investigates this through two subjective experiments: 1) a multiple comparison of relative vis for stimuli with varying degrees of correlation; and 2) the absolute measurement of upper and lower vis boundaries for extreme stimuli conditions. octave-band (center frequencies: 63 hz to 16 khz) and broadband pink noise signals have been decorrelated using two techniques: all-pass filtering and complementary comb-filtering. these stimuli were presented from vertically-spaced loudspeaker pairs at three azimuth angles (0°, ±30°, and ±110°), with each angle assessed discretely. both the relative and absolute test results show no significant effect of vertical correlation on vis for the 63 hz, 125 hz, and 250 hz bands. for the 500 hz band and above, there is a general tendency for vis to increase as correlation decreases, which is observed for both decorrelation methods.},}

TY - paper
TI - The Frequency and Loudspeaker-Azimuth Dependencies of Vertical Interchannel Decorrelation on the Vertical Spread of an Auditory Image
SP - 537 EP - 555
AU - Gribben, Christopher
AU - Lee, Hyunkook
PY - 2018
JO - Journal of the Audio Engineering Society
IS - 7/8
VO - 66
VL - 66
Y1 - July 2018 TY - paper
TI - The Frequency and Loudspeaker-Azimuth Dependencies of Vertical Interchannel Decorrelation on the Vertical Spread of an Auditory Image
SP - 537 EP - 555
AU - Gribben, Christopher
AU - Lee, Hyunkook
PY - 2018
JO - Journal of the Audio Engineering Society
IS - 7/8
VO - 66
VL - 66
Y1 - July 2018
AB - In horizontal stereophony, it is known that interchannel correlation relates to the horizontal spread of a phantom auditory image. However, little is known about the perceptual effect of interchannel correlation on vertical image spread (VIS) between two vertically-arranged loudspeakers. The present study investigates this through two subjective experiments: 1) a multiple comparison of relative VIS for stimuli with varying degrees of correlation; and 2) the absolute measurement of upper and lower VIS boundaries for extreme stimuli conditions. Octave-band (center frequencies: 63 Hz to 16 kHz) and broadband pink noise signals have been decorrelated using two techniques: all-pass filtering and complementary comb-filtering. These stimuli were presented from vertically-spaced loudspeaker pairs at three azimuth angles (0°, ±30°, and ±110°), with each angle assessed discretely. Both the relative and absolute test results show no significant effect of vertical correlation on VIS for the 63 Hz, 125 Hz, and 250 Hz bands. For the 500 Hz band and above, there is a general tendency for VIS to increase as correlation decreases, which is observed for both decorrelation methods.