| 主权项 |
1. A speaker apparatus, comprising,
a speaker assembly, the speaker assembly including a diaphragm and a motor, wherein application of a first electric current to the motor causes a first movement of a portion of the motor, the first movement causing the diaphragm to move and responsively create sound energy in a first and non-ultrasonic frequency range; a piezoelectric driver that is disposed in proximal relation to the speaker assembly, wherein application of a second electric current to the piezoelectric driver causes actuation of the piezoelectric driver, the actuation being effective to produce an impact of a portion of the piezoelectric driver with the speaker assembly and cause a second movement of the diaphragm within the speaker assembly, the second movement responsively creating sound energy in a second and ultrasonic frequency range. |
