COMMUNITY-DRIVEN / OPEN-SOURCE / NON-PROFIT
Open Acoustics
Foundation
Healthy and good-sounding acoustic environments for everyone
OUR MISSION
Modern acoustics solutions for healthy, good-sounding environments increasingly depend on software. Yet many valuable research codes remain difficult to discover, reuse, and sustain. The Open Acoustics Foundation exists to democratize acoustics research and promote open, reproducible science by supporting the community initiatives that make this possible.
Sustainable foundation
The foundation revolves around (and is carried by) multiple stakeholders: researchers to provide new results and methods, sponsors and donators to enable maintaining and further developing the tools and to organize community events, and users to use the tools created and provide valuable feedback for improving them.
Community driven
The foundation supports community initiatives around open research results and methods, which are aimed at collaboration and growth of the community.
Impact vehicle
Innovative research developments are carried out outside the foundation, at universities and research institutes, while the foundation acts as an impact vehicle for the research results.
Open Source
The open source principle is key: all results and tools are openly made available to the public, for free and without limitations.
News & Events
To secure a sustainable software platform connected to its community
Autumn '26 - CHORAS event
A new CHORAS community event will take place, more info will follow later!
Sep '26 - Forum Acusticum
The Open Acoustics Foundation will be publicly launched at Forum Acusticum in Graz.
May '26 - Open Acoustics Foundation founded
The stichting Open Acoustics Foundation was founded on May 13th in Eindhoven.
May '26 - CHORAS introduced in two TU/e courses
TU/e Bachelor students of the Room Acoustics Course and Master students of the Techniques in Architectural Acoustics course use CHORAS to analyse and improve spaces.
May '26 - Second developer workshop
Developers of open-source room acoustics simulation tools work together in Eindhoven to connect their methods to CHORAS.
Nov '25 - First user workshop (ASSA)
Users explore CHORAS while using it and provide feedback and ideas to improve the platform.
April '25 - First developer workshop
Developers of open-source room acoustics simulation tools work together in Eindhoven to connect their methods to CHORAS.
OUR PROJECT
Our flagship and first project is CHORAS, the Community Hub for Open-source Room Acoustics Software. CHORAS is a web-based platform that brings together the newest room acoustics simulation methods: making them accessible to researchers, consultants, and students worldwide via an intuitive browser interface.
Built on open-source principles, CHORAS and its connected third-party back-end software projects below are freely available.
acousticDE
Simulation of room acoustics based on solving the Diffusion Equation method using the finite volume method.
edg-acoustics
Room acoustics solver based on the time-domain wave-based Discontinuous Galerkin (dg) method.
pyroomacoustics
Hybrid Image Source Model and Ray Tracing to simulate room acoustics.
Founders OPEN ACOUSTICS FOUNDATION
MEET THE FOUNDERS
From left to right
- Silvin Willemsen
- Marco Berzborn
- Cédric Van hoorickx
- Maarten Hornikx
- Bram Botterman
Questions
The foundation was established to democratize research outputs in acoustics for the built environment. We make scientific methods, software, and results openly accessible so that researchers, industry professionals, educators, and society can benefit from and contribute to advances in acoustics.
The foundation is a non-profit and independent organization. Its purpose is not to generate profit, but to maximize the impact, accessibility, and long-term sustainability of open research outcomes. This creates a neutral platform where collaboration and knowledge sharing come first.
Our work benefits a broad community. Researchers gain a platform to share and build upon scientific developments, industry gains access to reliable tools and methods, educators can use open resources in teaching, and society benefits from improved knowledge and innovation in acoustics.
CHORAS is the foundation’s first flagship platform. It provides open-source tools and methods for acoustics research and practice. The foundation supports its development, maintenance, community building, training, benchmarking activities, and deployment, ensuring that CHORAS remains accessible and useful for everyone.
Support can take many forms. Researchers can contribute methods and software, users can provide feedback and participate in the community, and organizations can sponsor activities, events, and platform development. Together, these contributions help ensure the long-term availability of open and reproducible acoustics research.
COMMUNITY-DRIVEN / OPEN-SOURCE / NON-PROFIT
The future of acoustic software is open source
Healthy and good-sounding acoustic environments for everyone