Abstract
The round robin 3 study examined a small but complex room with special diffusors. The room was measured and the material properties of all surfaces in the room were obtained in octave bands 125 Hz - 4k Hz. The study compared over 20 simulation tools to simulate the studio room of PTB institute. Results were given both with open curtains and closed curtains. The Schroeder frequency of this room is calculated Hz. A strong standing wave was present in the room and a large part of the wall area could be covered with curtains.
Key findings
- Treble's wave-based solver can show how T30 changes with different positions, while the other GA software simulations can’t.
- Treble's wave-based solver can predict T30 well at low frequencies, while the other GA software simulations overestimate absorption.
- At higher frequencies, Treble's GA solver simulations underestimated less compared to other software's GA simulations.
Recent posts
Join our webinar on February 26th unveiling new Treble SDK capabilities for advanced voice processing and audio AI, including dynamic scene simulation, a new source receiver device for own voice and echo cancellation scenarios and powerful tools for large scale synthetic data generation. Industry leaders in audio technology and voice AI will join to discuss how these advancements elevate product performance and accelerate research and development.
Meet Treble at ISE 2026
We will be at ISE 2026 in Barcelona on February 3-6 where wewill showcase the Treble Web Application for high-fidelity room acoustic simulations, giving visitors a hands-on look at our streamlined cloud-based approach to acoustic prediction and auralization.
Synthetic realism in speech enhancement: Training models for the real world with ai-coustics
Tim Janke, Co-founder and Head of Research at ai-coustics, examines why voice AI systems struggle outside controlled environments and how training data is often the limiting factor.
The article introduces synthetic realism as a data driven approach to teaching models what truly matters in real acoustic scenes, from distance and geometry to room acoustics. It also shows how physics based simulation with the Treble SDK enables spatially accurate training data that translates into more reliable speech enhancement and voice agent behavior in production.
