使用球形環繞聲喇叭系統以增強沈浸感體驗

Abstract

近年來隨著虛擬實境技術的發展，虛擬實境中的聲音系統也成為重要的研究議題。由於虛擬實境的體驗不像一般的電腦或電影體驗，使用者可能會在過程中轉動身體及頭部朝向不同的方向。也就是說，在虛擬實境的體驗中，前方並不是固定的方向。這個情形將導致原本的雙聲道喇叭或環繞音響系統不適用於虛擬實境，因此虛擬實境的聲音播放系統往往是使用耳機。在聲音技術方面，包含高度的三維立體聲技術也是近年重要的議題。本篇論文將使用6、12和19顆實體喇叭，以及球形環繞聲技術（Ambisonic）建立三套球形環繞聲喇叭系統，並透過實驗評估這三套系統之間在聲音定位準確度及在虛擬實境中臨場感的差異性，且研究視覺提示對這三種系統的聲音定位準確度的影響。

In recent years, with the development of the virtual reality (VR) technique, the sound systems of the VR content become an important research topic. Unlike the experience in computer or movies, the user would rotate his/her body and head toward different direction during the VR experience. That is to say, a fixed front side doesn’t exist in the VR environment. This circumstance results in the fact that the stereo speaker systems and the surround sound speaker systems is no longer suit in the VR application. Therefore, most of the VR sounds use the headphone for playback. In terms of the sound technique, a sound system with height channels is also an important topic these years. In this study, we use 6, 12 and 19 loudspeakers with Ambisonic technique to build 3 different layouts of periphonic system. An experiment is performed to evaluate the sound localization accuracy and the sense of presence in VR for each layout of speakers. In addition, the influence of the visual cue on sound localization is evaluated.