Head-related transfer function range extrapolation and near-field compensated high-order Ambisonics

Head-related transfer function range extrapolation (HRTF-RE) predicts HRTFs at various source distances from the known HRTFs at a fixed source distance and discrete directional grid. Near-field-compensated higher order Ambisonics (NFC-HOA) recreates virtual source at various distances by using a set...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2016-10, Vol.140 (4), p.3276-3277
Main Author: Xie, Bo-sun
Format: Article
Language:English
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Summary:Head-related transfer function range extrapolation (HRTF-RE) predicts HRTFs at various source distances from the known HRTFs at a fixed source distance and discrete directional grid. Near-field-compensated higher order Ambisonics (NFC-HOA) recreates virtual source at various distances by using a set of loudspeakers arranged on a spherical surface with fixed radius. HRTF-RE and NFC-HOA seem to be two different fields and were studied individually in previous works. The present work analyzes the relationship between HRTF-RE and NFC-HOA. Based on the spherical harmonics-Bessel expansion of sound field, it is proved that HRTF-RE and NFC-HOA are mathematically equivalent and therefore share some common characters and limitations. Based on the equivalence, the interchanging some of the methods used by the two fields is discussed. [This work was supported by the Guangzhou Science and Technology Plan Projects under No. 2014Y2-00021.]
ISSN:0001-4966
1520-8524
DOI:10.1121/1.4970410