What are the common materials used for sound diffusion in sound architecture?

Some common material used for sound diffusion in sound architecture are:

1. Wood paneling

2. Acoustic foam

3. Stone walls

4. Concrete surfaces

5. Angle-cut foam panels

6. Fiberglass insulation

7. Diffuser arrays

8. Metal grilles

9. Fabric panels

10. Curved and perforated metal sheets.

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