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Open AccessFeature PaperArticle

Optimization of Virtual Loudspeakers for Spatial Room Acoustics Reproduction with Headphones

Department of Computer Science, Aalto University School of Science, P.O. Box 13300, 00076 Aalto, Finland
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Appl. Sci. 2017, 7(12), 1282; https://doi.org/10.3390/app7121282
Received: 31 October 2017 / Revised: 24 November 2017 / Accepted: 5 December 2017 / Published: 9 December 2017
(This article belongs to the Special Issue Sound and Music Computing)
The use of headphones in reproducing spatial sound is becoming more and more popular. For instance, virtual reality applications often use head-tracking to keep the binaurally reproduced auditory environment stable and to improve externalization. Here, we study one spatial sound reproduction method over headphones, in particular the positioning of the virtual loudspeakers. The paper presents an algorithm that optimizes the positioning of virtual reproduction loudspeakers to reduce the computational cost in head-tracked real-time rendering. The listening test results suggest that listeners could discriminate the optimized loudspeaker arrays for renderings that reproduced a relatively simple acoustic conditions, but optimized array was not significantly different from equally spaced array for a reproduction of a more complex case. Moreover, the optimization seems to change the perceived openness and timbre, according to the verbal feedback of the test subjects. View Full-Text
Keywords: Spatial audio; Spatial sound reproduction; SDM; Headphone reproduction; Optimization Spatial audio; Spatial sound reproduction; SDM; Headphone reproduction; Optimization
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Puomio, O.; Pätynen, J.; Lokki, T. Optimization of Virtual Loudspeakers for Spatial Room Acoustics Reproduction with Headphones. Appl. Sci. 2017, 7, 1282.

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