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By T. Cox, P. D'Antonio

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Sample text

The wavefront from a diffuser is just complicated; it is not incoherent. To achieve physical incoherence, the surface would have to move or change in a random fashion over time. Another terminology commonly used is to say the reflection is diffuse. There is no formal definition of this, but it refers to the case where the reflection is dispersed both spatially and temporally. Many modern designs are designed by examining the spatial dispersion and assuming that this will be accompanied by temporal dispersion.

The original design for the diffusers in the Hummingbird Centre was for Schroeder diffusers, which were to be cloth covered to hide their visual appearance. This is a common story in diffuser design. The acoustical treatment needs to complement the visual appearance of the room to be acceptable to architects. 2 Application of optimized curved diffusers (OptiCurveTM ) in the Hummingbird Centre, Toronto (after D’Antonio and Cox [1]). Chapters 7 and 9, this would have turned the side wall diffusers into absorbers.

The acoustical treatment needs to complement the visual appearance of the room to be acceptable to architects. 2 Application of optimized curved diffusers (OptiCurveTM ) in the Hummingbird Centre, Toronto (after D’Antonio and Cox [1]). Chapters 7 and 9, this would have turned the side wall diffusers into absorbers. (Another solution architects often apply to acoustical treatment that does not fit with the visual requirement of a space, is to remove the treatment completely. ) In the Hummingbird Centre, the designers were encouraged to try a new method for designing optimized curved surfaces, which will be outlined in Chapter 10.

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