| 摘要 |
A loudspeaker 1 according to the present invention comprises a hermetically-sealed enclosure 3, a first driver 2a arranged at outside of the enclosure 3 and along a wall of the enclosure 3, a second driver 2b arranged at inside of the enclosure 3 and parallel to the first driver 2a across the wall of the enclosure 3 from the first driver 2a, and a pipe 7 communicating the first driver and the second driver. Each of the drivers 2a and 2b has a diaphragm 4, and a frame 5 surrounding the diaphragm 4. The frame 5 has an opening 5a. The pipe 7 is connected to the opening 5a of the frame 4 of the first driver 2a, penetrates through the wall of the enclosure 3, and is connected to the opening 5a of the frame 4 of the second driver 2b, and thereby forming one hermetically-sealed space enclosed with the diaphragms 4 and the frames 5 of the two drivers 2a and 2b. The second driver 2b is configured to output a signal of opposite phase to that of the first driver 2a. Thus, reaction of the diaphragm 4 can be canceled, and a problem of back pressure of the loudspeaker 1 can be removed. |
