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The Effect of Calibration Errors When Combining Sound Field Interpolation with Head-Related Transfer Functions

Björkman, Anton ; Sundström, David LU ; Jakobsson, Andreas LU orcid and Elvander, Filip LU (2025) 2025 IEEE Statistical Signal Processing Workshop (SSP) p.106-110
Abstract
In this work, we study the problem of estimating the in-ear sound field using microphone measurements at nearby positions. Typically, the sound field is first interpolated to the position of the head under free-field assumptions, followed by filtering through pre-measured head-related transfer functions (HRTFs). While properties of free-field interpolation methods have been well studied with respect to calibration errors, less is known about these properties when used in combination with a head-related transfer function. Herein, these properties are evaluated through controlled experiments in an anechoic chamber. The results indicate that, in the presence of errors in the assumed temperature and diffuseness of the sound field, it is always... (More)
In this work, we study the problem of estimating the in-ear sound field using microphone measurements at nearby positions. Typically, the sound field is first interpolated to the position of the head under free-field assumptions, followed by filtering through pre-measured head-related transfer functions (HRTFs). While properties of free-field interpolation methods have been well studied with respect to calibration errors, less is known about these properties when used in combination with a head-related transfer function. Herein, these properties are evaluated through controlled experiments in an anechoic chamber. The results indicate that, in the presence of errors in the assumed temperature and diffuseness of the sound field, it is always beneficial to use HRTFs on top of free-field interpolation for interpolating the in-ear sound field. However, interestingly, for large errors in the assumed orientation of the head, the use of an HRTF can even produce worse interpolation as compared to free-field interpolation. (Less)
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author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
2025 IEEE Statistical Signal Processing Workshop (SSP) : 8-11 June 2025 - 8-11 June 2025
pages
106 - 110
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
conference name
2025 IEEE Statistical Signal Processing Workshop (SSP)
conference dates
2025-06-08 - 2025-06-11
external identifiers
  • scopus:105012193264
ISBN
979-8-3315-1800-4
DOI
10.1109/SSP64130.2025.11073276
language
English
LU publication?
yes
id
a8ae081c-7d0d-4aaf-a6f7-2310cb9073b4
alternative location
https://ieeexplore.ieee.org/document/11073276/
date added to LUP
2025-10-18 20:39:21
date last changed
2026-01-23 11:35:06
@inproceedings{a8ae081c-7d0d-4aaf-a6f7-2310cb9073b4,
  abstract     = {{In this work, we study the problem of estimating the in-ear sound field using microphone measurements at nearby positions. Typically, the sound field is first interpolated to the position of the head under free-field assumptions, followed by filtering through pre-measured head-related transfer functions (HRTFs). While properties of free-field interpolation methods have been well studied with respect to calibration errors, less is known about these properties when used in combination with a head-related transfer function. Herein, these properties are evaluated through controlled experiments in an anechoic chamber. The results indicate that, in the presence of errors in the assumed temperature and diffuseness of the sound field, it is always beneficial to use HRTFs on top of free-field interpolation for interpolating the in-ear sound field. However, interestingly, for large errors in the assumed orientation of the head, the use of an HRTF can even produce worse interpolation as compared to free-field interpolation.}},
  author       = {{Björkman, Anton and Sundström, David and Jakobsson, Andreas and Elvander, Filip}},
  booktitle    = {{2025 IEEE Statistical Signal Processing Workshop (SSP) : 8-11 June 2025}},
  isbn         = {{979-8-3315-1800-4}},
  language     = {{eng}},
  month        = {{06}},
  pages        = {{106--110}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  title        = {{The Effect of Calibration Errors When Combining Sound Field Interpolation with Head-Related Transfer Functions}},
  url          = {{http://dx.doi.org/10.1109/SSP64130.2025.11073276}},
  doi          = {{10.1109/SSP64130.2025.11073276}},
  year         = {{2025}},
}