Towards Modeling Dynamic Head-Above-Torso Orientations in Head-Related Transfer Functions (en)

* Presenting author
Day / Time: 07.03.2023, 16:20-16:40
Room: Saal Y9
Typ: Vortrag (strukturierte Sitzung)
Abstract: 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 of up to 20 dB. 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 developed a 3D head and torso model that can rotate its head with three degrees of freedom based on a schematic model of the average healthy young cervical spine. The model can be used to numerically simulate HRTFs for the physically possible range of head-above-torso orientations. The model is intended to analyze the torso effect in more detail and to acoustically model dynamic head-above-torso movements for virtual acoustic reality.


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