Capsule Calibration Approaches for Low-Cost Higher Order Ambisonic Microphone Arrays

Conference paper


Middlicott, C. and Wiggins, B. 2022. Capsule Calibration Approaches for Low-Cost Higher Order Ambisonic Microphone Arrays. 153rd Audio Engineering Society Convention. Audio Engineering Society.
AuthorsMiddlicott, C. and Wiggins, B.
TypeConference paper
Abstract

Low-cost electret microphone capsules, such as those accessible to the audio hobbyist or DIY audio electronics community are typically available ‘unmatched’. Ideally one would like to ensure these capsules all reside within a very small production/performance tolerance. In a cost-focused, mass-production environment it is not feasible to measure and match large batches of capsules hence the acoustic performance will differ from capsule to capsule. This paper summarises workaround approaches to capsule calibration in an effort to mitigate/overcome the problems caused by capsule mismatch, with a specific focus on its applications ambisonics and multi-microphone arrays.

KeywordsAmbisonics; Immersive Audio; Microphones; Calibration
Year2022
Conference153rd Audio Engineering Society Convention
PublisherAudio Engineering Society
Web address (URL)http://www.aes.org/e-lib/browse.cfm?elib=21914
Accepted author manuscript
License
File Access Level
Open
Output statusPublished
Publication dates
Online19 Oct 2022
Publication process dates
Deposited15 Nov 2022
Permalink -

https://repository.derby.ac.uk/item/9q8w6/capsule-calibration-approaches-for-low-cost-higher-order-ambisonic-microphone-arrays

Download files


Accepted author manuscript
AES153_Paper32_Middlicott.pdf
License: CC BY 4.0
File access level: Open

  • 9
    total views
  • 1
    total downloads
  • 2
    views this month
  • 1
    downloads this month

Export as

Related outputs

WHAM: To Asymmetry and Beyond!
Dring, M. and Wiggins, Bruce 2021. WHAM: To Asymmetry and Beyond! Institute of Acoustics.
The design and optimisation of surround sound decoders using heuristic methods
Wiggins, Bruce, Berry, Stuart, Lowndes, Val and Paterson-Stephens, Iain 2003. The design and optimisation of surround sound decoders using heuristic methods.
Development of an ambisonic guitar system GASP: Guitars with ambisonic spatial performance
Werner, Duncan, Wiggins, Bruce and Fitzmaurice, Emma 2021. Development of an ambisonic guitar system GASP: Guitars with ambisonic spatial performance. in: CRC Press/ Routledge.
WHAM - Webcam Head-tracked AMbisonics
Dring, M. and Wiggins, Bruce 2020. WHAM - Webcam Head-tracked AMbisonics. Institute of Acoustics.
Calibration approaches for higher order ambisonic microphones
Middlicott, Charlie and Wiggins, Bruce 2019. Calibration approaches for higher order ambisonic microphones.
The transparency of binaural auralisation using very high order circular harmonics
Dring, M. and Wiggins, Bruce 2019. The transparency of binaural auralisation using very high order circular harmonics. Institute of Acoustics.
Development of ambisonic microphone design tools – Part 1.
Middlicott, Charlie and Wiggins, Bruce 2018. Development of ambisonic microphone design tools – Part 1. Audio Engineering Society.
Development of ambisonic microphone design tools – Part 1.
Middlicott, Charlie and Wiggins, Bruce 2018. Development of ambisonic microphone design tools – Part 1. Proceedings of the 145th Convention of the Audio Engineering Society.
Analysis of binaural cue matching using ambisonics to binaural decoding techniques
Wiggins, Bruce 2017. Analysis of binaural cue matching using ambisonics to binaural decoding techniques.
Head tracked audio for all - the 3D audio VR revolution
Wiggins, Bruce 2016. Head tracked audio for all - the 3D audio VR revolution. Institute of Acoustics.
Modelling the performance of speaker arrays in domestic listening environments.
Dring, M., Middlicott, Charlie, Wiggins, Bruce and Vilkaitis, Alex 2017. Modelling the performance of speaker arrays in domestic listening environments. Institute of Acoustics.
GASP v2: Guitars with Ambisonic Spatial Performance
Werner, Duncan, Wiggins, Bruce, Box, Charlie, Dallali, Dominic, Hooley, Jack and Middlicott, Charlie 2016. GASP v2: Guitars with Ambisonic Spatial Performance.
AmbiFreeVerb 2—Development of a 3D ambisonic reverb with spatial warping and variable scattering
Wiggins, Bruce and Dring, M. 2016. AmbiFreeVerb 2—Development of a 3D ambisonic reverb with spatial warping and variable scattering. Audio Engineering Society.
Room acoustics and virtual reality: An implementation of auralisation and 360 degree image techniques to create virtual representations of spaces
Vilkaitis, Alex, Dring, M., Middlicott, Charlie, Hill, Adam J. and Wiggins, Bruce 2016. Room acoustics and virtual reality: An implementation of auralisation and 360 degree image techniques to create virtual representations of spaces. Institute of Acoustics.
GASP: Guitars with ambisonic spatial performance
Werner, Duncan, Wiggins, Bruce, Lawson, Tom, Weightman, Tom and Callister, Joe 2015. GASP: Guitars with ambisonic spatial performance.
Inside-outside: 3-D music through tissue conduction
McKenzie, I., Lennox, Peter and Wiggins, Bruce 2015. Inside-outside: 3-D music through tissue conduction.
Has Ambisonics come of age?
Wiggins, Bruce 2008. Has Ambisonics come of age? Reproduced Sound 24 Conference Proceedings Vol 30. Pt 6.
Tissue-conducted spatial sound fields
McKenzie, I., Lennox, Peter and Wiggins, Bruce 2014. Tissue-conducted spatial sound fields. Institute of Acoustics.
Hearing Without Ears
McKenzie, I., Lennox, Peter and Wiggins, Bruce 2014. Hearing Without Ears. International Community for Auditory Display.
Validation of a quad-rotor helicopter matlab/simulink and solidworks models
Poyi, Gwangtim Timothy, Wu, Mian Hong, Bousbaine, Amar and Wiggins, Bruce 2013. Validation of a quad-rotor helicopter matlab/simulink and solidworks models.
The generation of panning laws for irregular speaker arrays using heuristic methods
Wiggins, Bruce 2007. The generation of panning laws for irregular speaker arrays using heuristic methods. Audio Engineering Society.
Distance coding and performance of the mark 5 and st350 SoundField microphones and their suitability for Ambisonic reproduction.
Wiggins, Bruce and Spenceley, Thomas 2009. Distance coding and performance of the mark 5 and st350 SoundField microphones and their suitability for Ambisonic reproduction. Proceeding of the Institute of Acoustics, Vol 31, Pt 4..
An investigation into the real-time manipulation and control of three-dimensional sound fields
Wiggins, Bruce 2004. An investigation into the real-time manipulation and control of three-dimensional sound fields. Thesis