| 摘要 |
PROBLEM TO BE SOLVED: To increase and output the low band even if a speaker enclosure is small. SOLUTION: When the speaker 10 is activated, vibrations of cone paper of the speaker 10 are propagated to the air in the speaker enclosure 20. A vibration region 22a of a diaphragm 22 is vibrated by the vibrations of the air. At that time, the diaphragm 22 vibrating while it is kept airtight by an edge 30 compresses or decompresses the air volume in the speaker enclosure 20 when it vibrates. Accordingly, another resonance frequency is generated between the compliance to which an air spring of the speaker enclosure 20 is added in addition to the elasticity of the diaphragm 30 and the equivalent mass of the diaphragm 22. As a result, sound is generated as reproduced around the resonance frequency of the diaphragm 22. COPYRIGHT: (C)2007,JPO&INPIT
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