Individualization of head related transfer function


Head related transfer functions (HRTFs) are needed to present virtual spatial sound sources via headphones. Since individually measured HRTFs are very costly and time consuming, in this paper the individualization of the dummyhead’s HRTFs will be discussed. Here, the individualization is based on a scalable ellipsoidal head model. From this model the individualization is splitted into the individualization of the interaural time difference (ITD) and the spectral domain. The ellipsoidal modeling of the ITD gives quantitatively good results, considering the individual measurements. The second approach in spectral domain scales the transfer function in frequency. An angle dependent scaling factor is calculated by the head dimensions of the subject. Afterwards, the scaling results are compared and discussed with individual measurements.

Keywords:
binaural technology, virtual reality, HRTF


Autoři: Marcia Lins;  Ramona Bomhardt
Působiště autorů: Institute of Technical Acoustics - RWTH Aachen University, Aachen, Germany
Vyšlo v časopise: Lékař a technika - Clinician and Technology No. 1, 2014, 44, 26-32
Kategorie: Původní práce

Souhrn

Head related transfer functions (HRTFs) are needed to present virtual spatial sound sources via headphones. Since individually measured HRTFs are very costly and time consuming, in this paper the individualization of the dummyhead’s HRTFs will be discussed. Here, the individualization is based on a scalable ellipsoidal head model. From this model the individualization is splitted into the individualization of the interaural time difference (ITD) and the spectral domain. The ellipsoidal modeling of the ITD gives quantitatively good results, considering the individual measurements. The second approach in spectral domain scales the transfer function in frequency. An angle dependent scaling factor is calculated by the head dimensions of the subject. Afterwards, the scaling results are compared and discussed with individual measurements.

Keywords:
binaural technology, virtual reality, HRTF


Zdroje

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