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| 遮音等級× | BEM Acoustics× | |
|---|---|---|
| 分野 | 音響学 | 音響学 |
| 系統 | Process / pipeline | Process / pipeline |
| 提唱年≠ | 1961 | 1971 |
| 提唱者≠ | ASTM International | Carlos Brebbia, Robert Butterfield |
| 種類≠ | Building partition acoustic rating | Computational simulation for acoustics |
| 原典≠ | ASTM E413-16 (2016). Classification for Rating Sound Insulation. American Society for Testing and Materials. link ↗ | Burton, A. J., & Miller, G. F. (1971). The application of integral equation methods to the numerical solution of some exterior boundary-value problems. Proceedings of the Royal Society A, 323(1553), 201–210. DOI ↗ |
| 別名≠ | STC, sound transmission loss, acoustic isolation | BEM, boundary element method, indirect BEM, direct BEM |
| 関連 | 5 | 5 |
| 概要≠ | Sound Transmission Class (STC) is a single-number rating used to describe how well building elements (walls, doors, windows) reduce sound transmission between adjacent spaces. Standardized by ASTM International and ISO, STC is calculated from sound transmission loss (STL) measurements across the speech frequency range (125 Hz–4 kHz). It is the primary metric used in building codes, product specifications, and acoustic design to ensure privacy, noise control, and occupant comfort. | The Boundary Element Method (BEM) is a numerical technique for solving acoustic wave equations in complex geometries. Unlike finite element methods (FEM) that mesh entire volumes, BEM discretizes only the acoustic boundaries (surfaces), reducing computational cost and memory. First applied to acoustics by Burton and Miller in 1971, BEM is widely used for predicting room acoustics, exterior noise radiation, and acoustic scattering without the need for volumetric meshing. |
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