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1. 发明授权

US6081064A Acoustic transducer system 失效
标题翻译：声学传感器系统
公开(公告)号：US6081064A
公开(公告)日：2000-06-27
申请号：US217033
申请日：1998-12-21
申请人： Helmut Pfeiffer , Gerold Klotz-Engmann , Karl Flogel
发明人： Helmut Pfeiffer , Gerold Klotz-Engmann , Karl Flogel
IPC分类号： H04R9/00 , G10K9/13 , G10K11/35 , G10K13/00 , H04R7/04 , H02R17/00 , H01L41/053
CPC分类号： G10K11/35 , G10K13/00 , G10K9/13
摘要： The acoustic transducer system includes a flexural vibrating plate coupled to an electromechanical transducer and so configured that it is stimulated to higher order flexural vibrations at the system operating frequency, at which nodal lines form on the flexural vibrating plate between which first and second antinodal zones are located oscillating alternatingly opposite in phase. For influencing the sound radiation, in the second antinodal zones oscillating in phase with respect to each other and opposite in phase in relation to the first antinodal zones one mass ring each is arranged on the rear side of the flexural vibrating plate facing away from the transmission medium concentrically to the centerpoint of the flexural vibrating plate. Due to the increased mass the second antinodal zones oscillate at a substantially smaller amplitude than the first antinodal zones so that the sound waves opposite in phase generated by the first and second antinodal zones are unable to fully cancel each other out, as a result of which a radiation pattern materializes having a pronounced directivity in the direction perpendicular to the flexural vibrating plate.
摘要翻译：声换能器系统包括耦合到机电换能器的弯曲振动板，并且被配置为在系统工作频率下被刺激到更高阶的弯曲振动，在该操作频率处，在第一和第二防结区之间的弯曲振动板上形成节点线位于相位交替地相反地摆动。为了影响声辐射，在相对于彼此相对于第一反节点相位相位振荡的第二反节点区域中，相对于第一反节点区域相反地振动一个质量环，每个环形配置在弯曲振动板的背离透射体的后侧与中心点相同，与弯曲振动板的中心点相同。由于质量增加，第二抗结块区域以比第一抗结块区域更小的振幅振荡，使得由第一和第二抗结扎区产生的相位相反的声波不能完全抵消彼此，结果是辐射图案在垂直于弯曲振动板的方向上具有明显的方向性。

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