TY - GEN
T1 - TOWARDS MODELING DYNAMIC HEAD-ABOVE-TORSO ORIENTATIONS IN HEAD-RELATED TRANSFER FUNCTIONS
AU - Brinkmann, Fabian
AU - Smith, Dannie
AU - Anderst, William J.
AU - Amengual Garí, Sebastià V.
AU - Alon, David Lou
AU - Weinzierl, Stefan
N1 - Publisher Copyright:
© 2023 Brinkmann et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - The torso and shoulder affect the head-related transfer function (HRTF) by means of reflection and diffraction. The reflection is strongest if the ear, source, and shoulder are approximately aligned and superimposes a comb-filter upon the HRTF magnitude spectrum that can have a depth of up to 5 dB above approximately 700 Hz. In case the direct sound path to the ear is obstructed by the shoulder or torso, they act as a low-pass with a high frequency damping starting at approximately 1 kHz and reaching up to 20 dB at 20 kHz. However, relatively little is known about the exact nature of the torso effect for different head-above-torso orientations with current data being based either on simplified geometric models, a neutral head-above-torso orientation, or head-above torso rotations in a single plane. To close this gap, we aim at developing a 3D head and torso model that can rotate its head with three degrees of freedom based on a functional model of the average healthy young cervical spine. In this work, we introduce the parameterization of the model. The model can be used to numerically simulate HRTFs for the anatomically possible range of head-above-torso orientations and is intended to analyze the torso effect in more detail and to acoustically model dynamic head-above-torso movements for virtual acoustic reality.
AB - The torso and shoulder affect the head-related transfer function (HRTF) by means of reflection and diffraction. The reflection is strongest if the ear, source, and shoulder are approximately aligned and superimposes a comb-filter upon the HRTF magnitude spectrum that can have a depth of up to 5 dB above approximately 700 Hz. In case the direct sound path to the ear is obstructed by the shoulder or torso, they act as a low-pass with a high frequency damping starting at approximately 1 kHz and reaching up to 20 dB at 20 kHz. However, relatively little is known about the exact nature of the torso effect for different head-above-torso orientations with current data being based either on simplified geometric models, a neutral head-above-torso orientation, or head-above torso rotations in a single plane. To close this gap, we aim at developing a 3D head and torso model that can rotate its head with three degrees of freedom based on a functional model of the average healthy young cervical spine. In this work, we introduce the parameterization of the model. The model can be used to numerically simulate HRTFs for the anatomically possible range of head-above-torso orientations and is intended to analyze the torso effect in more detail and to acoustically model dynamic head-above-torso movements for virtual acoustic reality.
KW - cervical spine
KW - head-above-torso orientation
KW - head-related transfer function
UR - https://www.scopus.com/pages/publications/85191257350
M3 - Conference contribution
AN - SCOPUS:85191257350
T3 - Proceedings of Forum Acusticum
BT - Forum Acusticum 2023 - 10th Convention of the European Acoustics Association, EAA 2023
PB - European Acoustics Association, EAA
T2 - 10th Convention of the European Acoustics Association, EAA 2023
Y2 - 11 September 2023 through 15 September 2023
ER -