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1. 发明授权

US07376236B1 Piezoelectric film sonic emitter 有权
标题翻译：压电薄膜声发射体
公开(公告)号：US07376236B1
公开(公告)日：2008-05-20
申请号：US09478114
申请日：2000-01-04
申请人： Joseph O. Norris , James J. Croft, III , Alan Robert Selfridge , Pierre Khuri-Yakub
发明人： Joseph O. Norris , James J. Croft, III , Alan Robert Selfridge , Pierre Khuri-Yakub
IPC分类号： H04R3/00
CPC分类号： H04R17/00
摘要： A speaker device for emitting subsonic, sonic or ultrasonic compression waves comprising a generally hollow drum, a rigid emitter plate attached to the drum, and a plurality of apertures formed within the plate which are covered by a thin piezoelectric film disposed across the emitter plate. A pressure source is coupled to the drum for developing a biasing pressure with respect to the thin film at the apertures to distend the film into an arcuate emitter configuration capable of constricting and extending in response to variations in the applied electrical input at the piezoelectric film to thereby create a compression wave in a surrounding environment. Parametric ultrasonic frequency input is supplied to the piezoelectric film to propagate multiple ultrasonic frequencies having a difference component corresponding to the desired subsonic, sonic or ultrasonic frequency range.
摘要翻译：一种用于发射亚音速，声波或超声波压缩波的扬声器装置，其包括大致中空的鼓，附接到滚筒的刚性发射器板以及形成在该板内的多个孔，该多个孔由设置在发射极板上的薄压电薄膜覆盖。压力源耦合到滚筒，用于相对于孔处的薄膜产生偏置压力，以将薄膜扩展成弓形发射器配置，其能够响应于在压电薄膜上施加的电输入的变化而收缩和延伸，从而在周围环境中产生压缩波。将参数超声波频率输入提供给压电膜，以传播具有对应于期望的亚音速，声波或超声波频率范围的差分分量的多个超声波频率。

2. 发明授权

US06850623B1 Parametric loudspeaker with improved phase characteristics 有权
标题翻译：参数扬声器具有改进的相位特性
公开(公告)号：US06850623B1
公开(公告)日：2005-02-01
申请号：US09430801
申请日：1999-10-29
申请人： Elwood G. Norris , Joseph O. Norris , James J. Croft, III
发明人： Elwood G. Norris , Joseph O. Norris , James J. Croft, III
IPC分类号： H04R3/00 , H04R17/00 , H03G1/00 , G08B1/00 , G08C19/16 , H04R1/02
CPC分类号： H04R17/00 , H04R2217/03
摘要： A parametric loudspeaker which uses multiple piezoelectric bimorph transducers. These multiple piezoelectric bimorphs 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：使用多个压电双压电晶片的参数扬声器。这些多个压电双晶片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。

3. 发明授权

US07729498B2 Modulator processing for a parametric speaker system 有权
标题翻译：用于参数扬声器系统的调制器处理
公开(公告)号：US07729498B2
公开(公告)日：2010-06-01
申请号：US11651944
申请日：2007-01-09
申请人： Michael E. Spencer , James J. Croft, III , Joseph O. Norris
发明人： Michael E. Spencer , James J. Croft, III , Joseph O. Norris
IPC分类号： H04B3/00
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 when driving the air at saturation levels and below saturation levels. The parametric loudspeaker uses a pre-processed single sideband 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 pre-processor 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，其使用改进的调制器来补偿在饱和水平和低于饱和水平下驱动空气时空气中的参数过程的非线性。参数化扬声器使用预处理的单边带调制器，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，但是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了双边带，截断双边带或单边带处理的饱和限制的影响，以实现卓越的输出。

4. 发明授权

US06584205B1 Modulator processing for a parametric speaker system 有权
标题翻译：用于参数扬声器系统的调制器处理
公开(公告)号：US06584205B1
公开(公告)日：2003-06-24
申请号：US09384084
申请日：1999-08-26
申请人： James J. Croft, III , Michael E. Spencer , Joseph O. Norris
发明人： James J. Croft, III , Michael E. Spencer , Joseph O. Norris
IPC分类号： H03G500
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 when driving the air at saturation levels and below saturation levels. The parametric loudspeaker uses a pre-processed single sideband 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 pre-processor 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，其使用改进的调制器来补偿在饱和水平和低于饱和水平下驱动空气时空气中的参数过程的非线性。参数化扬声器使用预处理的单边带调制器，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，但是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了双边带，截断双边带或单边带处理的饱和限制的影响，以实现卓越的输出。

5. 发明授权

US08199931B1 Parametric loudspeaker with improved phase characteristics 有权
标题翻译：参数扬声器具有改进的相位特性
公开(公告)号：US08199931B1
公开(公告)日：2012-06-12
申请号：US12106909
申请日：2008-04-21
申请人： Elwood G. Norris , Joseph O. Norris , James J. Croft, III
发明人： Elwood G. Norris , Joseph O. Norris , James J. Croft, III
IPC分类号： H04R1/40
CPC分类号： H04R17/00 , H04R2217/03
摘要： A method is disclosed for increasing a parametric output of a parametric loudspeaker system. The method can include the operation of providing multiple ultrasonic frequency emission zones that output signals in a frequency band. The phase relationships of the ultrasonic frequency emission zones can be correlated and controlled to increase phase coherence between each ultrasonic frequency emission zone to maximize parametric output. Correlating and controlling the phase relationships can include offsetting a frequency of a carrier signal applied to each emission zone from a resonant frequency of each emission zone in view of a rate of change of phase of each emission zone in a vicinity of each resonant frequency. Ultrasonic energy from the ultrasonic frequency emission zones can be generated, using the correlated phase relationship to increase the parametric output.
摘要翻译：公开了一种用于增加参数化扬声器系统的参数输出的方法。该方法可以包括提供在频带中输出信号的多个超声频率发射区域的操作。超声波发射区的相位关系可以进行相关和控制，以增加每个超声频率发射区之间的相位相干性，以最大化参数输出。考虑到每个发射区在每个共振频率附近的相位变化率，相关和控制相位关系可以包括从每个发射区的谐振频率偏移施加到每个发射区的载波信号的频率。可以产生超声波发射区的超声波能量，利用相关的相位关系增加参数输出。

6. 发明授权

US07343017B2 System for playback of pre-encoded signals through a parametric loudspeaker system 有权
标题翻译：通过参数化扬声器系统播放预编码信号的系统
公开(公告)号：US07343017B2
公开(公告)日：2008-03-11
申请号：US10091950
申请日：2002-03-04
申请人： Joseph O. Norris , James J. Croft, III
发明人： Joseph O. Norris , James J. Croft, III
IPC分类号： H04B3/00 , H04B5/00
CPC分类号： H04R17/00 , H04B11/00 , H04R3/00 , H04R2217/03
摘要： A method and system for generating parametric output directly from a prerecorded and error corrected parametric signal for playback in a parametric loudspeaker system. The method includes the step of retrieving a pre-encoded audio signal from an electronically readable storage medium. In addition, an ultrasonic carrier signal has at least one sideband which represents the pre-encoded audio signal. The next step is playing back the pre-encoded audio signal through an ultrasonic amplifier and emitter.
摘要翻译：一种用于直接从预记录和纠错参数信号产生参数输出的方法和系统，用于在参数化扬声器系统中回放。该方法包括从电子可读存储介质检索预编码音频信号的步骤。此外，超声载波信号具有表示预编码音频信号的至少一个边带。下一步是通过超声波放大器和发射器播放预编码的音频信号。

7. 发明授权

US07162042B2 Modulator processing for a parametric speaker system 有权
标题翻译：用于参数扬声器系统的调制器处理
公开(公告)号：US07162042B2
公开(公告)日：2007-01-09
申请号：US10393893
申请日：2003-03-21
申请人： Michael E. Spencer , James J. Croft, III , Joseph O. Norris
发明人： Michael E. Spencer , James J. Croft, III , Joseph O. Norris
IPC分类号： H04B3/00
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 when driving the air at saturation levels and below saturation levels. The parametric loudspeaker uses a pre-processed single sideband 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 pre-processor 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，其使用改进的调制器来补偿在饱和水平和低于饱和水平下驱动空气时空气中的参数过程的非线性。参数化扬声器使用预处理的单边带调制器，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，但是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了双边带，截断双边带或单边带处理的饱和限制的影响，以实现卓越的输出。

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