Optimizing Speech Intelligibility in Practical Applications using State-of-the-Art Acoustic Simulation Tools (Paper)
"Optimizing Speech Intelligibility in Practical Applications using State-of-the-Art Acoustic Simulation Tools", paper presented at the International Acoustics & Sound Reinforcement Conference, 2024 January 22-26, Le Mans, France.
Link to the paper in the AES Online E-Library. (You have to be a member of the AES online library. Please note that subscription costs are low.)
Stefan Feistel
AFMG Technologies, Berlin, Germany
Daniele Ponteggia
Studio Ponteggia, Terni, Italy
Abstract
The objective evaluation of speech intelligibility of sound systems using the Speech Transmission Index (STI) is nowadays common practice. This paper discusses various aspects of optimizing intelligibility of sound systems for public spaces as driven by regulatory standards and client requirements. New workflows, utilizing acoustic modelling software and targeted towards the optimization of the STI, are showcased. Parameters such as predicted loudspeaker coverage, reflections, signal and noise levels, and corresponding spectra are considered. Special emphasis is put on the investigation of the effects of signal and noise masking. Results from real-world examples reveal a strong correlation between STI predictions and measurements.
Practical benefits
The paper takes a closer look at Speech Intelligibility and allows an acoustic design professional to apply advanced STI optimization techniques, revise and improve workflows, and increase simulation accuracy.
