Research Article
Sound Attenuation of Membranes Loaded with Square Frame-Shaped Masses
Table 2
Properties of frame-shaped mass inclusions.
| Configuration | Central mass (g) | Frame I (g) | Frame II (g) | Distance from the center: Frame I (mm) | Distance from the center: Frame II (mm) | Frames I and II width (mm) |
| Model I | 0.32 | — | — | — | — | — | Model II | — | 0.32 | — | 2.14 | — | 0.856 | Model III | 0.32 | 0.32 | — | 2.14 | — | 0.856 | Model IV | — | 0.32 | 0.32 | 2.14 | 3.85 | 0.856 |
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