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公开(公告)号：US07224219B2
公开(公告)日：2007-05-29
申请号：US11523363
申请日：2006-09-18
申请人： Michael E Spencer
发明人： Michael E Spencer
IPC分类号： H03F3/38
CPC分类号： H04B11/00 , H03F3/2171 , H03F3/66 , H03F2200/331
摘要： A method and device for frequency shifting and amplifying an audio signal for use in a parametric loudspeaker system is disclosed. The method includes the operation of receiving an input audio signal and creating a reference signal. The audio signal is compared with the reference signal to derive a compared product signal. The compared product signal is sent to a switching power stage. Nonlinear preprocessing is performed with respect to the input audio signal, and/or a non-triangle wave is created as the reference signal. The input audio signal is shifted and amplified by modulating the reference signal in the switching power stage.
摘要翻译： 公开了一种用于对参数化扬声器系统中使用的音频信号进行频移和放大的方法和装置。 该方法包括接收输入音频信号并创建参考信号的操作。 将音频信号与参考信号进行比较以得到比较产品信号。 将比较的产品信号发送到开关功率级。 对输入音频信号执行非线性预处理，和/或创建非三角波作为参考信号。 输入音频信号通过调制开关功率级中的参考信号而被移位和放大。
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公开(公告)号：US07224808B2
公开(公告)日：2007-05-29
申请号：US10234958
申请日：2002-09-03
CPC分类号： G10K15/02 , H04R2217/03
摘要： A system configured to dynamically adjust the ultrasonic carrier level in a parametric array system in response to changing source signal input levels, and which employs a look-ahead delay strategy to enable optimal modulation of the carrier wave to eliminate constant ultrasonic carrier emission and reduce the ultrasonic carrier emission to what is actually needed to accommodate the db range of the source material, and at the same time, to also minimize noticeable distortion and sound artifacts of a high-power ultrasonic carrier, and/or distortion/artifacts arising from modulation of an ultrasonic carrier to reduce average power output; and thus it realizes advantages of carrier modulation based on source-signal level, while minimizing inherent drawbacks of carrier modulation.
摘要翻译： 一种被配置为响应于源信号输入电平变化而在参数阵列系统中动态调整超声波载波电平的系统，并且采用先行延迟策略以实现载波的最佳调制以消除恒定的超声波载波发射并减少 超声波载波发射到实际需要以适应源材料的db范围的同时，并且同时还使大功率超声波载体的显着失真和声音伪影最小化和/或由调制产生的失真/伪像 超声波载体降低平均功率输出; 因此它实现了基于源信号电平的载波调制的优点，同时最小化载波调制的固有缺点。
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公开(公告)号：US07729498B2
公开(公告)日：2010-06-01
申请号：US11651944
申请日：2007-01-09
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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公开(公告)号：US07109789B2
公开(公告)日：2006-09-19
申请号：US10501896
申请日：2003-01-21
申请人： Michael E. Spencer
发明人： Michael E. Spencer
IPC分类号： H03F3/38
CPC分类号： H04B11/00 , H03F3/2171 , H03F3/66 , H03F2200/331
摘要： A modulator-amplifier configured for use in parametric sound reproduction systems, including an input configured for receiving at least one input signal, a reference signal generator configured for generating a reference signal, and a comparator stage coupled to the input and the reference signal generator, the comparator stage configured for detecting relationships between a first signal based on the input signal and the reference signal. A switching power stage coupled to the comparator is configured to receive a second signal derived from a combination of an output from the comparators and the input signal, wherein there is a non-linear relationship between the input signal and the timing of state transitions in the switching power stage for the purpose of generating an output that has been shifted in frequency relative to a frequency of the input signal, and which includes at least one sideband.
摘要翻译： 配置用于参数声音再现系统的调制器 - 放大器，包括被配置为接收至少一个输入信号的输入，被配置为产生参考信号的参考信号发生器，以及耦合到所述输入端和所述参考信号发生器的比较器级， 所述比较器级被配置用于检测基于所述输入信号的第一信号与所述参考信号之间的关系。 耦合到比较器的开关功率级被配置为接收从比较器的输出和输入信号的组合导出的第二信号，其中在输入信号和状态转换的定时之间存在非线性关系 开关功率级，用于产生相对于输入信号的频率在频率上移位并且包括至少一个边带的输出。
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公开(公告)号：US06584205B1
公开(公告)日：2003-06-24
申请号：US09384084
申请日：1999-08-26
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。
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6.发明申请ENVIRONMENTALLY CONTROLLED FREQUENCY RESPONSE MODIFICATION FOR LONG RANGE HAILING SYSTEM 审中-公开环境危害系统的环境控制频率响应修改公开(公告)号：US20080013753A1
公开(公告)日：2008-01-17
申请号：US11775796
申请日：2007-07-10
IPC分类号： H03G5/00
CPC分类号： H03G5/025
摘要： Systems and methods for altering audio for more effective delivery to long range targets. An example of the present invention includes a speaker coupled to a processor and one or more sensors suitable for sensing environmental conditions such as temperature and humidity. The processor reads the output of the sensors and compensates for frequency dependent attenuation likely to occur at the sensed environmental condition. In one embodiment, the user specifies a range that the sound is to travel and an equalization table compensating for attenuation at the desired range is selected according to the user input.
摘要翻译： 用于改变音频以更有效地传送到远程目标的系统和方法。 本发明的示例包括耦合到处理器的扬声器和适于感测诸如温度和湿度的环境条件的一个或多个传感器。 处理器读取传感器的输出，并补偿可能在感测环境条件下发生的频率相关衰减。 在一个实施例中，用户指定声音要行进的范围，并且根据用户输入选择补偿在期望范围内的衰减的均衡表。
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公开(公告)号：US07162042B2
公开(公告)日：2007-01-09
申请号：US10393893
申请日：2003-03-21
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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