Recently, a new model for the propagation of sound in interior volumes known as the acoustic diffusion model has been explored as an alternative method for acoustic predictions and analysis. The model uses statistical methods standard in high frequency room acoustics to compute a spatial distribution of acoustic energy over time as a diffusion process. For volumes coupled through a structural p...

t-shape profile barriers are one of the most successful barriers among many different profiles. it has been shown that using welled diffusers on the top of t-shaped barriers makes a reactive barrier that shows better performance than that of any other used profile barriers compared with their equivalent absorbent barrier. the contribution of the top surface of reactive t-profile barriers to the...

abstract nature has developed materials, objects and processes that function from the macro scale to the nano scale. the understanding of the functions provided by objects and processes found in nature can guide us to imitate and produce appropriate architectural forms. biomimicry is a science that derives inspiration for solutions to human problems through the study of natural designs, systems...

Imagine that you are blindfolded inside an unknown room. You snap your fingers and listen to the room's response. Can you hear the shape of the room? Some people can do it naturally, but can we design computer algorithms that hear rooms? We show how to compute the shape of a convex polyhedral room from its response to a known sound, recorded by a few microphones. Geometric relationships between...

Post-secondary institutions require appropriately designed informal learning spaces (ILSs) outside of classrooms for studying and group-work activities, but few studies have investigated how these spaces perform, especially in terms of acoustics. We measured objective acoustical characteristics and architectural features in 23 such spaces, and captured environmental assessments and well-being o...

1 Robert O. Lawton Distinguished Professor, Department of Mathematics, Fellow AIAA. 2 Post-Doctoral Research Associate, Department of Mathematics. 3 Research Scientist, Structural Acoustics Branch, Aerodynamics, Aerothermodynamics and Acoustics Competency, Member AIAA. 4 Senior Research Scientist, Computational Modeling and Simulation Branch, Aerodynamics, Aerothermodynamics and Acoustics Compe...

This paper presents a unique insight into the way acousticians, computing specialists and sound designers describe the dimensions of sound they use. Seventy-five audio professionals completed a detailed questionnaire created to elicit common definitions of the words noise and soundscape, and to establish common methods of reifying sound, architectural acoustics and hearing abilities. The respon...