On the Influence of Transfer Function Noise on Low Frequency Pressure Matching for Sound Zones

Martin Bo Moller, Jesper Kjaer Nielsen, Efren Fernandez Grande, Soren Krarup Olesen

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Abstract

Controlling the sound field in a room with loudspeakers, requires information about how each loudspeaker radiates sound to the regions of interest. This information can be estimated by in-situ measurements of the transfer functions. However, noise in the estimates can severely deteriorate how well the sound field is controlled. Accurate transfer functions are especially important for sound zones, which rely on destructive interference between multiple loudspeakers. In the presented study, transfer function measurements from eight 10” woofers were repeated 30 times in a room. Pressure matching was used to create sound zones between 20–300 Hz. The performance is evaluated for individual and averaged transfer function measurements. Additionally, the effect of Tikhonov regularization based on the estimated noise in the transfer functions is examined.
Original languageEnglish
Title of host publicationProceedings of 2018 IEEE 10th Sensor Array and Multichannel Signal Processing Workshop
PublisherIEEE
Publication date2018
Pages331-335
DOIs
Publication statusPublished - 2018
Event2018 IEEE 10th Sensor Array and Multichannel Signal Processing Workshop - The Diamond, Sheffield, United Kingdom
Duration: 8 Jul 201811 Jul 2018

Conference

Conference2018 IEEE 10th Sensor Array and Multichannel Signal Processing Workshop
LocationThe Diamond
CountryUnited Kingdom
CitySheffield
Period08/07/201811/07/2018
Series2018 Ieee 10th Sensor Array and Multichannel Signal Processing Workshop (sam)
ISSN2151-870x

Keywords

  • Sound Zones
  • Sound Field Control

Cite this

Bo Moller, M., Kjaer Nielsen, J., Fernandez Grande, E., & Krarup Olesen, S. (2018). On the Influence of Transfer Function Noise on Low Frequency Pressure Matching for Sound Zones. In Proceedings of 2018 IEEE 10th Sensor Array and Multichannel Signal Processing Workshop (pp. 331-335). IEEE. 2018 Ieee 10th Sensor Array and Multichannel Signal Processing Workshop (sam) https://doi.org/10.1109/SAM.2018.8448689