Acoustic phase gratings for reduced specular reflection

摘要: Abstract The use of acoustic phase grating surfaces, Schroeder diffusers, to attenuate specular reflections has been investigated. concept primitive root diffusers is reviewed and developed. Some guidelines for proper design are given, the limitations identified. A modification sequence suggested which results in a null reflection direction at multiples frequency. This improves performance gratings particularly modulated periodic arrangements. optimisation achieve better broadband notch detailed.