• Rasmus Bo Bertelsen
3. term, Acoustics and Audio Technology, Master (Master Programme)
The spatial perception of the human auditory system is determined by the head-related transfer function (HRTF), which is based on the geometrical properties of the human outer ear and head.

People using hearing aids will, however, have their spatial perception significantly altered by listening through the hearing aid microphone, often placed far from the ear canal. How this effect applies to different microphone positions is hard to measure due to a large number of needed measurement positions.

In this project, a numerical simulation of HRTFs at different positions in the ear, based on the boundary element method (BEM), has been realized.

Simulations of HRTFs have been performed on a 3D model of a KEMAR artificial head where the results show good agreement with previous physical HRTF measurements.

Additional simulations have been carried out with the measurement point at different points around the ear, with results showing that the spectral features are generally not preserved above a certain frequency in most places in the pinna, which is in good agreement with previous research. Similar measurements were done on a different set of pinnas, showing similar results.

The findings suggest that BEM-based simulations are a good numerical alternative to physical measurements.
Publication date21 Dec 2020
Number of pages79
ID: 395189030