음장 합성 기법은 라우드스피커 어레이를 사용하여 보다 넓은 청취 공간을 제공하는 음향 재생 기법이다. 이를 이용한 렌더링 성능을 좌우하는 요소 중 하나로 스피커의 간격이 있다. 스피커의 간격은 앨리어싱 주파수와 직접적인 관계가 있으며 간격이 좁을수록 높은 성능을 보인다. 그런데 좁은 간격의 어레이를 사용하는 경우 라우드스피커의 저역 한계 주파수가 높아지게 마련이며 따라서 필수적으로 저주파 대역을 위한 서브 우퍼를 사용해야 한다. 이런 경우에 서브 우퍼에 의한 음상정위 오류가 있을 수 있다. 본 논문에서는 선행 효과를 이용하여 이 문제에 대한 해결방안을 제시한다.
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