Digital loudspeaker with enhanced performance

摘要

Digital loudspeaker comprising a support, a plurality of first membranes suspended on the support, said first membranes being bistable, and said loudspeaker comprising actuator for each of the first membranes that can change each of the first membranes from a first stable state to a second stable state and vice versa, and a controller for controlling said first actuator.

主权项

1. A digital loudspeaker comprising:
a support; a plurality of first membranes suspended on the support, said first membranes being bistable; a plurality of first actuators, each corresponding to one of the first membranes and each configured to cause a corresponding one of the first membranes to transition between a first stable state and a second stable state; and a controller to control at least one of said first actuators through application of a control signal to the at least one of the first actuators, the control signal being withdrawn when a respective first membrane completes transition from one of the first and second stable states to the other of the first and second stable states, the respective first membrane membranes remaining in the other of the first and second stable states after withdrawal of the control signal, wherein, prior to sending the control signal, the controller sends a reinitialization signal to the at least one of the plurality of first actuators to change a state of the respective first membrane to prepare the respective first membrane to generate acoustic pressure in response to the control signal.