发明授权
- 专利标题: Speaker apparatus and electronic apparatus having speaker apparatus enclosed therein
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申请号: US09884588申请日: 2001-06-19
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公开(公告)号: US06621908B2公开(公告)日: 2003-09-16
- 发明人: Kohei Asada , Tooru Sasaki , Akira Kimura , Takayuki Mizuuchi
- 申请人: Kohei Asada , Tooru Sasaki , Akira Kimura , Takayuki Mizuuchi
- 优先权: JPP10-007012 19980116; JPP10-019954 19980130; JPP10-045910 19980226; JPP10-090245 19980402; JPPCT/JP99/00136 19990118
- 主分类号: H04R2500
- IPC分类号: H04R2500
摘要:
A speaker apparatus in which the acoustic sound is radiated by flexural oscillations of a diaphragm in the form of a panel having a substantially flat surface. The speaker apparatus includes a panel-shaped diaphragm the outer rim of which can be oscillated substantially freely at least in the direction along the diaphragm thickness and at least one driver unit constituting an oscillation source secured to the diaphragm surface for imparting oscillations to the diaphragm. The diaphragm is set into flexural oscillations by oscillations applied from the driver unit driven on the basis of the playback input signal. By flexurally oscillating the diaphragm to radiate the acoustic sound, optimum frequency response characteristics can be obtained over a wide frequency range from the low to high frequency range. Moreover, the acoustic sound of optimum sound quality may be radiated in a state of minimum sound pressure level fluctuations over a frequency range from the low to high frequency range.