The realization of stereo effects with parametric loudspeaker and multiple reflectors

Sota Kurimoto, Yutaro Sugibayashi, Masanori Morise, Takanobu Nishiura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Human-beings can localize a direction from which a sound transmits. This is attributed to a difference of arrival time between two ears. This difference is defined as Interaural Time Difference (ITD). In other words, a sound image at a desired position is designed by controlling the ITD. A stereo effect has been proposed as the technique to control ITD for designing a sound image and requires two loudspeakers. On the other hand, we have focused on the stereo effects with a parametric loudspeaker, which has a sharper directivity because an ultrasound is utilized. In addition, the reflected sound of the signal emitted by the parametric loudspeaker also has a sharper directivity. We assumed that a single parametric loudspeaker can realize stereo effects, provided that this loudspeaker is able to emit a sound to two directions based on these characteristics. In this paper, we proposed the system to realize the stereo effects with a single parametric loudspeaker. We carried out the experiments for designing the sound image and moving the sound image. As a result, we confirmed that a single parametric loudspeaker could realize stereo effects and design a sound image and a moving sound image.

Original languageEnglish
Title of host publication40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Pages1037-1041
Number of pages5
Publication statusPublished - 1 Dec 2011
Event40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 - Osaka, Japan
Duration: 4 Sep 20117 Sep 2011

Publication series

Name40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Volume2

Conference

Conference40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
CountryJapan
CityOsaka
Period4/09/117/09/11

Keywords

  • Interaural time difference
  • Parametric loudspeaker
  • Sound image
  • Stereo effect

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    Kurimoto, S., Sugibayashi, Y., Morise, M., & Nishiura, T. (2011). The realization of stereo effects with parametric loudspeaker and multiple reflectors. In 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 (pp. 1037-1041). (40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011; Vol. 2).