| 摘要 |
A panel that can change its stiffness and/or surface roughness and thereby its sound quality is provided. The panel includes a layer having an outer surface and an inner surface oppositely disposed from the outer surface. The panel can also include an electroactive actuator that is operable to change its shape when a voltage is applied thereto. The change in shape of the electroactive actuator results in a change in stiffness and/or surface roughness of the panel and therefore a change in the panel's acoustic characteristics. In some instances, the electroactive actuator is at least partially within the panel and upon changing of its shape results in a change in the roughness of a surface that faces a sound source. In other instances, the activation of the electroactive actuator results in an increase in stiffness of the panel.
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