| 摘要 |
An acoustic device having a panel-form member adapted to support bending wave vibration and having a frequency distribution of resonant bending wave modes. The member is of substantially triangular form with the parameters of the member being selected to provide a desired frequency distribution of resonant modes. At least one of the parameters is selected from the ratio of the effective lengths of two of the sides of the triangular form, the effective angle between at least two of the sides of the triangular form, and the curvature of at least one side.
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