Higher-order stereophony
Higher-order stereophony
This work introduces a new theory for spatial audio recording and reproduction named Higher Order Stereophony. Through the use of the Taylor expansion, the technique accurately reproduces a sound field across a line that is orientated as the interaural axis of a listener, to attempt to recreate a set of desired binaural signals. The technique utilises loudspeaker amplitude panning, and is shown to encompass in its framework traditional Stereophony approaches such as the stereo sine law. Therefore, the technique expands Stereophony to higher orders and more loudspeakers, leading to a greater frequency range of accurate reproduction, in a similar manner to Higher Order Ambisonics. Higher Order Stereophony is shown to exhibit many similarities to Higher Order Ambisonics, and decoders to transition between the different sound field representations are derived. Higher Order Stereophony is also re-derived through a mode matching approach using a subset of spherical harmonics, those with degree index equal to zero only. The theoretical results are then validated through experimental measurements using various microphone arrays, considering the reproduced sound field across a single line and the reproduced spherical harmonic coefficients of the sound field.
Ear, Harmonic analysis, Loudspeakers, Microphone arrays, Spatial audio, Taylor series, Three-dimensional displays, higher order ambisonics (HOA), panning, stereophony
2872-2885
Hollebon, Jacob
75e4dd71-cfb5-4d28-82a5-7ee1bee73207
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
24 July 2023
Hollebon, Jacob
75e4dd71-cfb5-4d28-82a5-7ee1bee73207
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Hollebon, Jacob and Fazi, Filippo Maria
(2023)
Higher-order stereophony.
IEEE/ACM Transactions on Audio, Speech, and Language Processing, 31, .
(doi:10.1109/TASLP.2023.3297953).
Abstract
This work introduces a new theory for spatial audio recording and reproduction named Higher Order Stereophony. Through the use of the Taylor expansion, the technique accurately reproduces a sound field across a line that is orientated as the interaural axis of a listener, to attempt to recreate a set of desired binaural signals. The technique utilises loudspeaker amplitude panning, and is shown to encompass in its framework traditional Stereophony approaches such as the stereo sine law. Therefore, the technique expands Stereophony to higher orders and more loudspeakers, leading to a greater frequency range of accurate reproduction, in a similar manner to Higher Order Ambisonics. Higher Order Stereophony is shown to exhibit many similarities to Higher Order Ambisonics, and decoders to transition between the different sound field representations are derived. Higher Order Stereophony is also re-derived through a mode matching approach using a subset of spherical harmonics, those with degree index equal to zero only. The theoretical results are then validated through experimental measurements using various microphone arrays, considering the reproduced sound field across a single line and the reproduced spherical harmonic coefficients of the sound field.
Text
Higher-Order_Stereophony
- Accepted Manuscript
More information
Accepted/In Press date: 6 July 2023
Published date: 24 July 2023
Additional Information:
Publisher Copyright:
© 2014 IEEE.
Keywords:
Ear, Harmonic analysis, Loudspeakers, Microphone arrays, Spatial audio, Taylor series, Three-dimensional displays, higher order ambisonics (HOA), panning, stereophony
Identifiers
Local EPrints ID: 480090
URI: http://eprints.soton.ac.uk/id/eprint/480090
ISSN: 2329-9304
PURE UUID: 98f29de2-246b-4324-a943-6f6d9e7da595
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Date deposited: 01 Aug 2023 16:46
Last modified: 18 Mar 2024 03:11
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