The binaural performance of a cross-talk cancellation system with matched or mismatched setup and playback acoustics

Akeroyd, Michael A.; Chambers, J. D.; Bullock, D; Palmer, Alan R.; Summerfield, A. Quentin; Nelson, P.A.; Gatehouse, Stuart

doi:10.1121/1.2404625

Cited by 31 publications

(35 citation statements)

References 36 publications

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“…Such least-squares optimization can be based on measured transfer functions, which lifts many of the constraints on source positions imposed by the analytical approaches and is referred to herein as pressure matching (PM). PM represents a logical extension of binaural techniques such as crosstalk cancellation (e.g., Bai and Lee, 2006;Akeroyd et al, 2007) over a larger spatial region by allowing the definition of complex pressures, for instance, to define a plane wave propagating across the bright zone.…”

Section: Introductionmentioning

confidence: 99%

Acoustic contrast, planarity and robustness of sound zone methods using a circular loudspeaker array

Coleman

Jackson

Olik

et al. 2014

The Journal of the Acoustical Society of America

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Since the mid 1990s, acoustics research has been undertaken relating to the sound zone problem-using loudspeakers to deliver a region of high sound pressure while simultaneously creating an area where the sound is suppressed-in order to facilitate independent listening within the same acoustic enclosure. The published solutions to the sound zone problem are derived from areas such as wave field synthesis and beamforming. However, the properties of such methods differ and performance tends to be compared against similar approaches. In this study, the suitability of energy focusing, energy cancelation, and synthesis approaches for sound zone reproduction is investigated. Anechoic simulations based on two zones surrounded by a circular array show each of the methods to have a characteristic performance, quantified in terms of acoustic contrast, array control effort and target sound field planarity. Regularization is shown to have a significant effect on the array effort and achieved acoustic contrast, particularly when mismatched conditions are considered between calculation of the source weights and their application to the system.

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Section: Introductionmentioning

confidence: 99%

Acoustic contrast, planarity and robustness of sound zone methods using a circular loudspeaker array

Coleman

Jackson

Olik

et al. 2014

The Journal of the Acoustical Society of America

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“…HRTFs represent the directional-dependent transfer functions of sound to both ears (Blauert, 2001). In virtual acoustics, such as in SHB processing and cross-talk-cancellation (Akeroyd et al, 2007;Bauer, 1961;Møller, 1989), HRTFs may affect both the recording and the playback stage of sound reproduction. Møller et al (1996) demonstrated that there is no difference between localization in real life and when listening to recordings, if these are made using the subjects' own ears, and if headphones are equalized to their individual ears.…”

Section: E Individuality Of Hrtfsmentioning

confidence: 99%

Psychoacoustic evaluation of multichannel reproduced sounds using binaural synthesis and spherical beamforming

Song

Ellermeier

Hald

2011

The Journal of the Acoustical Society of America

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The binaural auralization of a 3D sound field using spherical-harmonics beamforming (SHB) techniques was investigated and compared with the traditional method using a head-and-torso simulator (HATS). The new procedure was verified by comparing simulated room impulse responses with measured ones binaurally. The objective comparisons show that there is good agreement in the frequency range between 0.1 and 6.4 kHz. A listening experiment was performed to validate the SHB method subjectively and to compare it to the HATS method. Two musical excerpts, pop and classical, were used. Subjective responses were collected in two head rotation conditions (fixed and rotating) and six spatial reproduction modes, including phantom mono, stereo, and surround sound. The results show that subjective scales of width, spaciousness, and preference based on the SHB method were similar to those obtained for the HATS method, although the width and spaciousness of the stimuli processed by the SHB method were judged slightly higher than the ones using the HATS method in general. Thus, binaural synthesis using SHB may be a useful tool to reproduce a 3D sound field binaurally, while saving considerably on measurement time because head rotation can be simulated based on a single recording.

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“…Distinguishing the points for system setup and performance evaluation is important for ensuring independence, especially when only one set of responses (from one measurement run) is available, or when analytical responses are used. Performance predictions based on the setup points lead to overestimated contrast that is never attainable in practice [12].…”

Section: Acoustic Contrast Control (Acc) Methodsmentioning

confidence: 99%

Influence of low-order room reflections on sound zone system performance

Olik¹,

Jackson²,

Coleman³

2013

Proceedings of Meetings on Acoustics

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Studies on sound field control methods able to create independent listening zones in a single acoustic space have recently been undertaken due to the potential of such methods for various practical applications, such as individual audio streams in home entertainment. Existing solutions to the problem have shown to be effective in creating high and low sound energy regions under anechoic conditions. Although some case studies in a reflective environment can also be found, the capabilities of sound zoning methods in rooms have not been fully explored. In this paper, the influence of low-order (early) reflections on the performance of key sound zone techniques is examined. Analytic considerations for small-scale systems reveal strong dependence of performance on parameters such as source positioning with respect to zone locations and room surfaces, as well as the parameters of the receiver configuration. These dependencies are further investigated through numerical simulation to determine system configurations which maximize the performance in terms of acoustic contrast and array control effort. The design rules for source and receiver positioning are suggested, for improved performance under a given set of constraints such as a number of available sources, zone locations and the direction of the dominant reflection.

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The binaural performance of a cross-talk cancellation system with matched or mismatched setup and playback acoustics

Cited by 31 publications

References 36 publications

Acoustic contrast, planarity and robustness of sound zone methods using a circular loudspeaker array

Acoustic contrast, planarity and robustness of sound zone methods using a circular loudspeaker array

Psychoacoustic evaluation of multichannel reproduced sounds using binaural synthesis and spherical beamforming

Influence of low-order room reflections on sound zone system performance

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