Figure 4 | Scientific Reports

Figure 4

From: Metadiffusers: Deep-subwavelength sound diffusers

Figure 4

(a) Phase and (b) magnitude of the spatially-dependent reflection coefficient of a PRD (black line) and the PR-metadiffuser (red doted). (c) Scaled scheme of the metadiffuser using N = 6 and M = 1. (d) Near field pressure distribution at 1 kHz of a PR-metadiffuser with prime number P = 7 and thickness L = 3.5 cm (e) phase grating QRD of thickness L = 17.1 cm and (f) reference flat plane reflector. (g) Far-field polar distribution of the PR-metadiffuser obtained by TMM (continuous blue) and FEM (dotted black), the reference PRD (dashed-grey), and a plane reflector with same width of the diffusers (continuous red).

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