基於波場合成的沉浸式聲音系統設計

Abstract

波場合成（Wave Field Synthesis, WFS）是一種精確還原聲場且不受聽眾位置影響的技術。在本研究中，我們製作了一條長180公分，由16個中高頻喇叭組成的陣列，並利用WFS技術計算所需的聲音訊號。我們進行了三項使用者研究，以評估聽者使用此系統時對音源位置的察覺與辨識能力。測試結果顯示，參與者在察覺音源左右移動時普遍比察覺前後移動更容易。在音源移動的辨識實驗結果中也顯示，參與者在大多數情況下能準確識別聲源移動的方向，但對較遠處的遠近距離差異會難以區分。此外，參與者對定點位置辨識差異所需的距離，會比音源移動的最小可覺察範圍更大，顯示聽者對移動的音源位置差異較為敏感。

Wave Field Synthesis (WFS) is a technology that accurately reproduces a sound field, unaffected by listener position. We constructed a 180cm long speaker array with 16 mid-high frequency speakers using WFS technology to calculate audio signal and conducted three user studies. Results showed that participants generally found it easier to detect sound source movements in the left-right direction compared to the front-back direction. Another study showed that participants were able to accurately identify the direction of sound source movement in most cases, but found it difficult to discriminate distance differences at greater distances. Additionally, the minimum distance required for participants to discriminate fixed positions is greater than the minimum perceptible range for moving sound sources, indicating that listeners are more sensitive to differences in the positions of moving sound sources.