Three-dimensional acoustic sound field reproduction based on hybrid combination of multiple parametric loudspeakers and electrodynamic subwoofer

Sugibayashi, Yutaro; Kurimoto, Sota; Ikefuji, Daisuke; Morise, Masanori; Nishiura, Takanobu

doi:10.1016/j.apacoust.2012.03.009

Cited by 17 publications

(9 citation statements)

References 5 publications

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“…In the field of virtual reality, the mixed reality (MR) system has recently been drawing attention as a prime technology for experiencing the virtual world [1]. This system can provide a higher realistic sensation with a combination of technologies to reproduce 3-dimensional (3-D) sound fields.…”

Section: Introductionmentioning

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: Introductionmentioning

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)

Self Cite

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“…Another way to add sound reproduction capabilities to objects is to utilize the parametric speaker technology [16,28]. This technology utilizes ultrasound to modulate with the sound signal, producing highly directional sound at the source.…”

Section: Introductionmentioning

confidence: 99%

Uminari

Ishiguro

Israr

Rothera

et al. 2014

Proceedings of the Ninth ACM International Conference on Interactive Tabletops and Surfaces

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“…In the field of virtual reality, the mixed reality (MR) system has recently been drawing attention as a technology for experiencing the virtual world [1]. This system can provide a higher realistic sensation with a combination of technologies to reproduce 3-dimensional (3-D) sound fields.…”

Section: Introductionmentioning

confidence: 99%

“…This system can provide a higher realistic sensation with a combination of technologies to reproduce 3-dimensional (3-D) sound fields. Therefore, we previously proposed a system for reproducing 3-D sound fields that uses a multiple parametric array loudspeaker (PAL) [1]. The PAL, which uses an ultrasound wave, can transmit acoustic sound to a particular area called an "audio spot" [2].…”

Section: Introductionmentioning

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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Three-dimensional acoustic sound field reproduction based on hybrid combination of multiple parametric loudspeakers and electrodynamic subwoofer

Cited by 17 publications

References 5 publications

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

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

Uminari

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

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