Patent ID: 9407979
Filing Date: 2016-08-02
CPC Classification: H04R

Claim Text:
1. A loudspeaker, comprising: a hermetically-sealed enclosure; a first driver arranged along a wall of the enclosure outside of the enclosure; a second driver arranged parallel to the first driver across the wall of the enclosure from the first driver inside of the enclosure; and a pipe communicating the first driver and the second driver, wherein each of the drivers has a diaphragm, and a frame surrounding the diaphragm, each of the frames has an opening at a side facing the wall of the enclosure, the pipe is connected to the opening of the frame of the first driver, penetrates through the wall of the enclosure, and is connected to the opening of the frame of the second driver, thereby forming one hermetically-sealed space enclosed with the diaphragms and the frames of the two drivers, and the second driver is configured to output a signal of opposite phase to that of the first driver.