| 摘要 |
PURPOSE:To reduce the space of a cabinet and to increase the woof reproducing frequency band with the 2nd compliance that is formed by a part of a diaphragm and an isolated inside or outside space of the cabinet. CONSTITUTION:A diaphragm 1 is supported by an edge 7 and driven by a voice coil 5. The coil 5 is set in a magnetic space of a field part 6. A ring-shape structure 10 and an edge-shape elastic matter 11 having the airtightness and connecting the structural body 10 to a frame 3 are provided to the diaphragm 1. Thus a dynamic loudspeaker is obtained. This speaker is loaded to a cabinet 8 of a type excepting a sealed-up type and having a bass-reflex port 9. Then the 2nd compliance is decided by a >=20% vibrating area of the diaphragm 1 and the capacity of the cabinet 8 in addition to the 1st compliance which is decided by a <=80% vibrating area of the diaphragm and the capacity of the cabinet 8. The woof reproducing frequency band is increased by the 2nd compliance. |
