手法を比較

	音線追跡（Acoustic Ray Tracing）	音響ホログラフィ
分野	音響学	音響学
系統	Process / pipeline	Process / pipeline
提唱年	1979	1985
提唱者	James Allen, David Berkley	James Maynard, Earl Williams, Yongjian Lee
種類	Computational room acoustics method	Sound field reconstruction method
原典	Allen, J. B., & Berkley, D. A. (1979). Image method for efficiently simulating small-room acoustics. Journal of the Acoustical Society of America, 65(4), 943–950.	Maynard, J. D., Williams, E. G., & Lee, Y. (1985). Near-field acoustic holography: I. Theory of generalized holography and the development of NAH. Journal of the Acoustical Society of America, 78(4), 1395–1413.
別名	ray tracing, geometric acoustics, image source method, sound ray propagation	NAH, near-field acoustics, sound field mapping, acoustic imaging
関連	5	5
概要	Acoustic ray tracing is a computational technique for predicting sound propagation in rooms by treating acoustic energy as rays that reflect specularly off surfaces. Formalized by Allen and Berkley in 1979 via the image source method, ray tracing is one of the most computationally efficient methods for room acoustic simulation, especially for early and mid-reflections. It is widely used in audio engineering, architectural acoustics, and interactive spatial audio for virtual environments.	Near-Field Acoustic Holography (NAH) is a technique for reconstructing 3D acoustic sound fields and visualizing sound radiation from sources by measuring pressure at a dense microphone array in the near field. Pioneered by Maynard, Williams, and Lee in 1985, NAH extends holographic principles from optics to acoustics, enabling detailed acoustic source characterization, noise source identification, and acoustic field visualization that is impossible with conventional single-point or line-array methods.