본 논문에서는 인공적인 가상 환경에서 사실적인 충격응답을 제공할 수 있는 방법을 모색하기 위한 첫 단계로서 실제 청취 공간에서 충격응답을 획득하고 장애물이 존재할 때 그 충격응답이 어떻게 변화하는지 살펴보기 위하여 충격응답 변화 실측에 대한 실험 결과를 제시한다. 실험은 일상적인 공간으로서 한국전자통신연구원의 회의실과 휴게실에서 수행하였으며, 실험 결과 장애물의 존재에 따라 그리고 청취 위치에 따라 주파수 영역에서 차이점이 발생하는 것을 확인할 수 있었다. 향후 흡음률 등 장애물에 대한 물리적 정보를 조사, 분석하고 보다 더 다양한 공간과 위치에서 장애물에 대한 충격응답의 변화로부터, MPEG-I Immersive Audio 등의 애플리케이션에서 사실적인 공간감을 제공하기 위한 인공적인 충격응답을 가공 방법을 제안할 수 있을 것으로 기대한다.
KSP Keywords
MPEG-I, immersive audio
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