手法を比較

	音線追跡（Acoustic Ray Tracing）	RT60 残響時間
分野	音響学	音響学
系統	Process / pipeline	Process / pipeline
提唱年	1979	1900
提唱者	James Allen, David Berkley	Wallace Clement Sabine
種類	Computational room acoustics method	Room acoustic descriptor
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.	Sabine, W. C. (1900). Collected Papers on Acoustics. Dover Publications.
別名	ray tracing, geometric acoustics, image source method, sound ray propagation	RT60, reverberation time, decay time
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.	RT60 (reverberation time) is the duration required for sound energy in a room to decay by 60 decibels after the source stops. Pioneered by Wallace Clement Sabine in 1900, RT60 is the most widely used single-number descriptor of room acoustic properties. It reflects how much sound is absorbed versus reflected by room surfaces and directly affects speech intelligibility, music clarity, and acoustic comfort.