| 摘要 |
<p>The invention relates to a sound control device for controlling sound transmitted through and/or reflected from a barrier member (10). The device includes a sensor (11) to sense said transmitted and/or reflected sound and to produce a signal representing the transmitted and/or reflected sound, an actuator (12) mounted on said barrier member (10) and arranged to conform to at least one surface (14) of the barrier member (10) and control means (13) responsive to said signal to provide a control signal to the actuator (12). The actuator may be made of a piezoelectric ceramic dispersed in a polymer material.</p> |
