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1. 发明申请

WO2001015491A1 MODULATOR PROCESSING FOR A PARAMETRIC SPEAKER SYSTEM 审中-公开
标题翻译：参数扬声器系统的调制器处理
公开(公告)号：WO2001015491A1
公开(公告)日：2001-03-01
申请号：PCT/US2000/023392
申请日：2000-08-25
申请人： AMERICAN TECHNOLOGY CORPORATION , SPENCER, Michael, E. , CROFT, James, J., III , NORRIS, Joseph, O. , REDDI, Seenu
发明人： SPENCER, Michael, E. , CROFT, James, J., III , NORRIS, Joseph, O. , REDDI, Seenu
IPC分类号： H04R3/00
CPC分类号： H04R3/00 , H04R2217/03
摘要： A parametric loudspeaker system using improved modulators to compensate for the non-linearity of the parametric process in air (NLD) when driving the air at saturation levels and below saturation levels. The parametric loudspeaker uses a preprocessed (Nth order distortion compensator) single sideband (SSB) modulator that offers ideal linearity as characterized by square root pre-processed double sideband modulators but with a lower carrier frequency and without the wide bandwidth requirements. By eliminating some or all of the lower sideband the carrier frequency can be reduced without producing sideband frequencies in the audible range. Lower operational frequencies result in greater translation efficiency and greater output capability before reaching the saturation limit of air. A preprocessor minimizes the effects of saturation limits for double sideband, truncated double sideband or single sideband processing to achieve superior output.
摘要翻译：参数化扬声器系统使用改进的调制器来补偿空气中参数过程（NLD）的非线性，当在饱和水平和低于饱和水平下驱动空气时。参数扬声器使用预处理（第N阶失真补偿器）单边带（SSB）调制器，其提供理想的线性度，其特征在于平方根预处理的双边带调制器，但具有较低的载波频率并且没有宽带宽要求。通过消除部分或全部低边带，可以减小载波频率，而不会在可听范围内产生边带频率。较低的操作频率在达到空气饱和极限之前会产生更大的翻译效率和更大的输出能力。预处理器最大限度地减少双边带，截断双边带或单边带处理饱和度限制的影响，以实现出色的输出。

2. 发明申请

WO0115491A9 MODULATOR PROCESSING FOR A PARAMETRIC SPEAKER SYSTEM 审中-公开
标题翻译：参数扬声器系统的调制器处理
公开(公告)号：WO0115491A9
公开(公告)日：2002-09-06
申请号：PCT/US0023392
申请日：2000-08-25
申请人： AMERICAN TECH CORP , SPENCER MICHAEL E , CROFT JAMES J III , NORRIS JOSEPH O , REDDI SEENU
发明人： SPENCER MICHAEL E , CROFT JAMES J III , NORRIS JOSEPH O , REDDI SEENU
IPC分类号： H04R3/00
CPC分类号： H04R3/00 , H04R2217/03
摘要： A parametric loudspeaker system using improved modulators to compensate for the non-linearity of the parametric process in air (NLD) when driving the air at saturation levels and below saturation levels. The parametric loudspeaker uses a preprocessed (Nth order distortion compensator) single sideband (SSB) modulator that offers ideal linearity as characterized by square root pre-processed double sideband modulators but with a lower carrier frequency and without the wide bandwidth requirements. By eliminating some or all of the lower sideband the carrier frequency can be reduced without producing sideband frequencies in the audible range. Lower operational frequencies result in greater translation efficiency and greater output capability before reaching the saturation limit of air. A preprocessor minimizes the effects of saturation limits for double sideband, truncated double sideband or single sideband processing to achieve superior output.
摘要翻译：参数化扬声器系统使用改进的调制器来补偿空气中参数过程（NLD）的非线性，当在饱和水平和低于饱和水平下驱动空气时。参数扬声器使用预处理（第N阶失真补偿器）单边带（SSB）调制器，其提供理想的线性度，其特征在于平方根预处理的双边带调制器，但具有较低的载波频率并且没有宽带宽要求。通过消除部分或全部低边带，可以减小载波频率，而不会在可听范围内产生边带频率。较低的操作频率在达到空气饱和极限之前会产生更大的翻译效率和更大的输出能力。预处理器最大限度地减少双边带，截断双边带或单边带处理饱和度限制的影响，以实现出色的输出。

3. 发明申请

WO0133902A3 PARAMETRIC LOUDSPEAKER WITH IMPROVED PHASE CHARACTERISTICS 审中-公开
标题翻译：具有改进相位特性的参数扬声器
公开(公告)号：WO0133902A3
公开(公告)日：2002-02-14
申请号：PCT/US0041689
申请日：2000-10-27
申请人： AMERICAN TECH CORP , NORRIS ELWOOD G , NORRIS JOSEPH O , CROFT JAMES J III
发明人： NORRIS ELWOOD G , NORRIS JOSEPH O , CROFT JAMES J III
IPC分类号： H04R3/00 , H04R17/00 , H04R25/00
CPC分类号： H04R17/00 , H04R2217/03
摘要： A parametric loudspeaker which uses multiple piezoelectric bimorph transducers (62). These multiple piezoelectric bimorphs (62) have a resonant frequency which varies from unit to unit. The phase response at and near the resonant frequency changes at a very high rate with slight changes in frequency. The associated modulator electronics have a primary carrier frequency that is optimized for maximum parametric output. This is achieved by aligning the carrier frequency with the flattest portions of the phase curve for maximum phase coordination among the multiple devices.
摘要翻译：一个使用多个压电双压电晶体传感器（62）的参数扬声器。这些多个压电双晶片（62）具有从单元到单元不同的谐振频率。谐振频率及其附近的相位响应以非常高的频率变化，频率略有变化。相关联的调制器电子器件具有针对最大参数输出而优化的主载波频率。这是通过将载波频率与相位曲线的平坦部分进行对准来实现的，以便在多个装置之间实现最大相位协调。

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