TY - GEN
T1 - Ear Centering for Near-Distance Head-Related Transfer Functions
AU - Urviola, Ayrton
AU - Sakamoto, Shuichi
AU - Salvador Castaneda, Cesar Daniel
N1 - Funding Information:
This study started when Ayrton Urviola and César D. Salvador were at Silicon Integrated (SI) Co., Ltd, China. This study was partly supported by SI, China and JSPS KAKENHI Grant Number 19H04145, Japan.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - The head-related transfer functions (HRTF) are a major tool in spatial sound technology for personal use. They are linear filters describing the transmission of sound from a point in space to the ears. The HRTFs are typically obtained for a sparse set of points at a single far distance, from which datapoints at near distances are synthesized using the spherical Fourier transform (SFT) and distance-varying filters (DVF). Ear centering is further required to match the center of the SFT (the center of the head) and the measurement positions (the ears). Hitherto, plane-wave (PW) translation operators have yield effective ear centering when synthesizing HRTFs at far distances. We propose to use spherical-wave (SW) translation operators for ear centering when synthesizing HRTFs at near distances. We contrasted the performance of SW and PW ear centering. Synthesis errors decreased consistently when applying SW ear centering and the enhancement was observed up to the maximum frequency determined by the input far-distance dataset.
AB - The head-related transfer functions (HRTF) are a major tool in spatial sound technology for personal use. They are linear filters describing the transmission of sound from a point in space to the ears. The HRTFs are typically obtained for a sparse set of points at a single far distance, from which datapoints at near distances are synthesized using the spherical Fourier transform (SFT) and distance-varying filters (DVF). Ear centering is further required to match the center of the SFT (the center of the head) and the measurement positions (the ears). Hitherto, plane-wave (PW) translation operators have yield effective ear centering when synthesizing HRTFs at far distances. We propose to use spherical-wave (SW) translation operators for ear centering when synthesizing HRTFs at near distances. We contrasted the performance of SW and PW ear centering. Synthesis errors decreased consistently when applying SW ear centering and the enhancement was observed up to the maximum frequency determined by the input far-distance dataset.
KW - Acoustic centering
KW - Distance-varying filter
KW - Head-related transfer functions
KW - Spherical Fourier transform
KW - Translation operator
UR - http://www.scopus.com/inward/record.url?scp=85123210433&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85123210433&partnerID=8YFLogxK
U2 - 10.1109/I3DA48870.2021.9610891
DO - 10.1109/I3DA48870.2021.9610891
M3 - Conference contribution
AN - SCOPUS:85123210433
T3 - 2021 Immersive and 3D Audio: From Architecture to Automotive, I3DA 2021
BT - 2021 Immersive and 3D Audio
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 Immersive and 3D Audio: From Architecture to Automotive, I3DA 2021
Y2 - 8 September 2021 through 10 September 2021
ER -