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Perceptual Evaluation Of A Multiband Acoustic Crosstalk Canceler Using A Linear Loudspeaker Array

Christoph Hohnerlein ; Jens Ahrens (Institutionen för arkitektur och samhällsbyggnadsteknik, Teknisk akustik)
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) p. 96-100. (2017)
[Konferensbidrag, refereegranskat]

We propose and evaluate an acoustic crosstalk canceler for binaural sound presentation based on an 8-channel linear loudspeaker array. The system uses traditional LSFI beamforming and path estimation in the mid and low frequency range, respectively. Simulations show a channel separation of around 40 dB over the vast part of the considered frequency range. The channel separation in a real-world implementation was measured to be 10 dB - 25 dB over a broadband spectrum of 250 Hz - 9000 Hz. When comparing localization precision of virtual binaural signals to ground-truth presentation with headphones, a 21 subject study revealed significantly higher localization precision (F(1) = 23.56, p < 0.001) when discounting front-back confusions, which in turn occurred significantly more often for most participants. Perceptually, externalization was rated significantly higher (t(20) = 3.983, p > 0.001); task difficulty, timbre and spaciousness where rated the same accross both presentation methods. Robustness of the method was high and no fixation of the subjects' heads was applied.

Nyckelord: spatial sound; transaural sound; crosstalk cancellation; beamforming; RACE

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Denna post skapades 2017-05-08. Senast ändrad 2018-01-16.
CPL Pubid: 249168


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