Guest post by Marco Caniato University of Applied Science HFT of Stuttgart, based on his recent presentation at Forum Acousticum / Euronoise 2025 conference in Málaga.
Background
Reverberation time (RT) is a fundamental parameter in room acoustics, directly affecting speech intelligibility, comfort, and the overall acoustic quality of a space. Yet, despite decades of research and the availability of both analytical models (like Sabine, Eyring, Millington) and advanced 3D simulation tools, accurately predicting RT remains a major challenge.
The challenge
The problem lies in the complexity of real environments. Predictive models often rely on simplified assumptions—uniform sound decay, ideal absorption coefficients, and perfect geometry—that rarely reflect reality. In practice, factors such as irregular room shapes, furniture, human presence, and the actual behavior of materials after installation introduce significant variability. Even 3D simulations, while more refined, frequently underestimate RT in treated spaces and struggle with low-frequency accuracy.
Recent analysis
In the recent study by Marco Caniato and Federica Bettarello, over 20 different environments were analysed, comparing predicted RT values with real measurements. The results revealed consistent mismatches, highlighting the limitations of current methodologies and the urgent need for more robust, hybrid approaches that combine empirical data with computational modelling.
Round Robin proposal
To support this advancement, the authors propose a Round Robin Test—a collaborative initiative where researchers apply their prediction methods to shared scenarios. While participation is encouraged, the core message is broader: improving RT prediction is essential not just for technical precision, but for designing spaces that truly support communication, learning, and well-being.
International participation needed
Acoustic professionals are invited to reflect on their tools and contribute to refining the science. Only through collective effort can we close the gap between theory and reality—and build environments that sound as good as they look.
Call to action
This Round Robin Test is more than a technical exercise—it’s a call to action. By participating, you contribute to a collective scientific effort that seeks to refine acoustic prediction models, improve design practices, and ultimately enhance the quality of our built environments.
Whether you’re an academic, engineer, or practitioner, your input matters. Let’s push the boundaries of knowledge together.
Interested in joining? Contact [email protected] by December 2025.
Together, we can build a stronger foundation for acoustic science—one reverberation at a time!
Conference paper available in the Forum Acousticum / Euronoise 2025 proceedings.
Faculty of Civil Engineering, Building Physics and Business Management, University of Applied Science HFT of Stuttgart Germany
Many thanks to Marco for this guest post and pioneering work! Thanks also to Colin Campbell for catching up with Marco in Malaga after his presentation to discuss how we at Acoustic Bulletin.com could support this excellent initiative!
Other post with work by Maro Caniato:
