---
title: "Overview of geometrical room acoustic modeling techniques"
authors: ["Lauri Savioja", "U. Peter Svensson"]
year: 2015
venue: "The Journal of the Acoustical Society of America"
arxiv: null
doi: "10.1121/1.4926438"
source: "https://doi.org/10.1121/1.4926438"
topics: [survey, geometric-acoustics, diffraction, auralization, geometric, radiosity]
seed_rank: 1694
seed_batch: "audio-harvest-2026-09-09"
reviewed: "2026-09-09"
pool: "graphics"
relevance_score: 10
lineage: geometric-acoustics
cites:
  - title: "Image method for efficiently simulating small-room acoustics"
    url: "https://doi.org/10.1121/1.382599"
    year: 1979
    arxiv: null
    doi: "10.1121/1.382599"
  - title: "Calculating the acoustical room response by the use of a ray tracing technique"
    url: "https://doi.org/10.1016/0022-460X(68)90198-3"
    year: 1968
    arxiv: null
    doi: "10.1016/0022-460X(68)90198-3"
  - title: "An analytic secondary source model of edge diffraction impulse responses"
    url: "https://doi.org/10.1121/1.428071"
    year: 1999
    arxiv: null
    doi: "10.1121/1.428071"
  - title: "Modeling Acoustics in Virtual Environments Using the Uniform Theory of Diffraction"
    url: "https://doi.org/10.1145/383259.383323"
    year: 2001
    arxiv: null
    doi: "10.1145/383259.383323"
  - title: "The Room Acoustic Rendering Equation"
    url: "https://doi.org/10.1121/1.2766781"
    year: 2007
    arxiv: null
    doi: "10.1121/1.2766781"
see:
  - "1674-image-method-for-efficiently-simulating-small-room-acoustics"
  - "1685-calculating-the-acoustical-room-response-by-the-use-of-a-ray-tracing"
  - "1673-an-analytic-secondary-source-model-of-edge-diffraction-impulse-responses"
  - "1668-modeling-acoustics-in-virtual-environments-using-the-uniform-theory-of"
  - "1677-the-room-acoustic-rendering-equation"
---

# Overview of geometrical room acoustic modeling techniques

## One-sentence takeaway

Savioja & Svensson 2015 JASA: the definitive survey of geometrical room-acoustic modeling — paths, surfaces, diffraction, auralization, radiosity.

## Why it matters here

Before minting another tracer, read this. It classifies image source / ray / beam / radiosity / diffraction (UTD vs BTM) and what each cannot do. The geometric-acoustics syllabus card for Anoptic.

## Key ideas

- **Taxonomy.** Path-based vs surface-based; specular vs diffuse vs diffracted.
- **Diffraction review.** UTD vs BTMS vs energy-based approximations.
- **Auralization practice.** How modeling choices hit the ear.
- **JASA 2015.** Harvest: 'definitive modern survey.'

## Caveats

Survey cutoff 2015 (pre-BDPT audio 2016, pre-diffraction pathfinding 2021, pre-differentiable 2025). Not a wave-methods survey (that's FDTD/FVTD papers).

## Links

- DOI: https://doi.org/10.1121/1.4926438