Back to results
US 6,023,123 AGranted
Acoustic vibration generator
AssigneeHollandse Signaalapparaten B.V.
InventorWillem Petiet
Life of this patent
Estimating the term…
Abstract
The invention relates to an arrangement for generating sound waves or anti-sound waves. For the sound waves. For the sound wave transducer, use can be made of window glass (1) or other types of transparent material, which is set into vibration by means of one or a plurality of actuators (6), such as piezo elements or actuators based on electrostatic attraction and repulsion.
Claims7
A noise dampening system for dampening acoustic vibrations entering a building via a window, comprising:
- a first substantially flat windowpane;
- a second substantially flat windowpane parallel to the first windowpane, said first windowpane having a vibrational rigidity higher than the second windowpane;
- an actuator configured to generate acoustic vibrations in at least one of the first and second windowpanes;
- a sensor attached to the second windowpane and configured to sense motion of the second windowpane;
- and
- a control unit coupled to the sensor and the actuator, said control unit being configured to control the actuator to minimize the motion of the second windowpane using signals received from the sensor, said signals corresponding to the motion of the second windowpane sensed by the sensor.
3 more elements
A windowpane arrangement, comprising:
- a first substantially flat windowpane;
- a second substantially flat windowpane parallel to said first windowpane, said first windowpane having a vibrational rigidity higher than the second windowpane;
- an actuator configured to generate acoustic vibrations in at least one of said first windowpane and said second windowpane;
- a sensor attached to the second windowpane and configured to sense motion of the second windowpane;
- and
- connecting means for connecting the sensor and the actuator to a control system for minimizing the motion of the second windowpane using signals received from the sensor, said signals corresponding to the motion of the second windowpane sensed by the sensor.
3 more elements
Dependencies are inferred from the claim text.