Physical Factors and Spatial Impressions of Surround Sound Recording

Kamekawa, Toru; Marui, Akira

doi:10.1109/snpd.2012.116

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…If the sound image is constructed to the left side of the listener, the ILD is higher than zero. In this experiment, we also evaluate a performance of the sound image localization by using interaural cross coefficient (IACC) [12]. IACC demonstrates the performance of the sound image localization by measuring the arrival time difference of an acoustic sound to each ear.…”

Section: A Objective Evaluation Experimentsmentioning

confidence: 99%

Robust sound image localization for moving listener with curved-type parametric loudspeaker

Ikefuji

Nakayama

Nishiura

et al. 2015

2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA)

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Recently, technologies for reproducing a 3-D sound field are required for providing highly realistic sensations. We previously proposed a system with multiple parametric loudspeakers that have a higher directivity by using ultrasound to reproduce an audible sound in a particular area. These loudspeakers can design sound images on walls, ceilings, and floors by reflecting an emitted sound, and thus, the proposed system can easily present incoming sound from various directions. However, it is difficult to maintain the performance of sound image localization when a listener moves away from the reproduction area of the emitted sound. In this paper, we propose a sound image design method with robust localization for moving listeners. In order to constantly present the sound image localization, the method needs to steer the direction of emission in accordance with the movement of the listener. To enable this, we developed a curved-type parametric loudspeaker consisting of ultrasonic transducers arranged in an arc. The proposed method can steer the emitting direction by switching the input ultrasonic transducers without moving itself. Experimental results clearly demonstrate the effectiveness of the proposed method.

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Section: A Objective Evaluation Experimentsmentioning

confidence: 99%

Robust sound image localization for moving listener with curved-type parametric loudspeaker

Ikefuji

Nakayama

Nishiura

et al. 2015

2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA)

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“…We evaluated the performance of the sound image localization and reverberation sensation by using the inter-aural cross coefficient (IACC) in the designed sound field with the proposed method [6]. Table TABLE I I shows the conditions of this experiment.…”

Section: A Objective Experiments On Adding Reverberationmentioning

confidence: 99%

Reverberation steering and listening area expansion on 3-D sound field reproduction with parametric array loudspeaker

Ikefuji

Tsujii

Masunaga

et al. 2014

Signal and Information Processing Association Annual Summit and Conference (APSIPA), 2014 Asia-Pacific

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Recently, technologies for reproducing a 3dimensional sound field are required for providing highly realistic sensations. Therefore, we previously proposed a system with multiple parametric array loudspeakers (PAL). PALs can design sound images on walls, ceilings, and floors by using the higher directivity of ultrasound. Thus, the proposed system can easily present incoming sound from various directions. However, it is difficult to provide a realistic sensation depending on the reverberation time. In addition, the listening area of one PAL is small. In this paper, we therefore propose two approaches for overcoming these problems. First, we propose reverberation steering with indirect electrodynamic loudspeakers and PALs. We also attempt to expand the listening area of the sound image with a curved-type PAL. As a result of evaluation experiments for each proposed approach, we could confirm the effectiveness of each approach.

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