梳理声场估计理论，揭示其在音频还原中的核心作用。
Sound Field Estimation: Theories and Applications
- 基于数学模型分两类声场估计方法，强调理论基础。
- 涵盖声场还原与耳机双耳播放等典型应用技术。
- 适合从事音频信号处理与声学系统设计的研究者。
声音的空间信息在日常生活与先进工程中具有关键作用。为充分发挥其潜力，学术界已开展大量空间音频信号处理研究。声场估计作为核心技术之一，可广泛应用于扬声器声场再现和头戴式耳机的双耳播放。本文旨在综述声场估计方法，先介绍必要的数学基础，再阐述两种不同方法的原理，并重点阐明各方法的核心理论，同时引用最新研究成果。最后，通过多个声学信号处理技术实例，展示声场估计的实际应用价值。
原文摘要 · Abstract (English)
The spatial information of sound plays a crucial role in various situations, ranging from daily activities to advanced engineering technologies. To fully utilize its potential, numerous research studies on spatial audio signal processing have been carried out in the literature. Sound field estimation is one of the key foundational technologies that can be applied to a wide range of acoustic signal processing techniques, including sound field reproduction using loudspeakers and binaural playback through headphones. The purpose of this paper is to present an overview of sound field estimation methods. After providing the necessary mathematical background, two different approaches to sound field estimation will be explained. This paper focuses on clarifying the essential theories of each approach, while also referencing state-of-the-art developments. Finally, several acoustic signal processing technologies will be discussed as examples of the application of sound field estimation.
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