Figure 3 | Scientific Reports

Figure 3

From: Metadiffusers: Deep-subwavelength sound diffusers

Figure 3

(a) Phase and (b) magnitude of the spatially-dependent reflection coefficient of a QRD (black line) and the QR-metadiffuser (red doted). (c) Scaled scheme of the QR-metadiffuser with N = 5 and M = 2. (d) Near field pressure distribution at 2 kHz of QR-metadiffuser with thickness L = 2 cm (e) phase grating QRD of thickness L = 27.4 cm and (f) flat plane reflector. (g) Far-field polar distribution of the QR-metadiffuser obtained by TMM (continuous blue) and FEM (dotted black), the reference QRD (dashed-grey), and a plane reflector with same width of the diffusers (continuous red).

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