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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：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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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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5.发明授权公开(公告)号：US10090819B2
公开(公告)日：2018-10-02
申请号：US14978280
申请日：2015-12-22
申请人： James J. Croft, III
发明人： James J. Croft, III
摘要： A signal processing system for controlling a lower frequency acoustic range of an acoustic output of a loudspeaker system. The system includes an input to receive at least a first channel audio signal, corresponding to the acoustic output of at least one loudspeaker with at least one electro-acoustic transducer with a vibratile diaphragm. The signal processing system includes at least one transpositional gain controller processor for transposition of at least a portion of the amplitude of at least one band of frequencies in a lower frequency audio signal range of the audio signal, to an increased gain in at least one transpositional target frequency in the lower frequency audio signal range. The transpositional gain controller processor includes at least one of at least one, static or dynamic, transpositional gain controller. The system may include at least one additional signal processor, supporting preservation of a perceived fidelity of the acoustic output.
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公开(公告)号：US08194502B1
公开(公告)日：2012-06-05
申请号：US12100000
申请日：2008-04-09
申请人： James J. Croft, III
发明人： James J. Croft, III
IPC分类号： H03G5/00
CPC分类号： G10K11/343
摘要： A system and method for varying the directionality of an acoustic output of a loud hailing and warning device is disclosed. The method includes the operation of placing a sliding high-pass filter in a signal path of a transducer array having a frequency-dependant dispersion characteristic. A control is provided that varies a lower cutoff frequency of the sliding high-pass filter. The lower cutoff frequency of an electronic audio signal is variably controlled and sent to the transducer array to variably control the directionality of the acoustic output of the loud hailing and warning device.
摘要翻译： 公开了一种用于改变声音输出和警告装置的声输出的方向性的系统和方法。 该方法包括将滑动高通滤波器放置在具有频率依赖色散特性的换能器阵列的信号路径中的操作。 提供了改变滑动高通滤波器的较低截止频率的控制。 电子音频信号的较低截止频率被可变地控制并被发送到换能器阵列以可变地控制大声呼叫和警告装置的声输出的方向性。
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公开(公告)号：US07551062B2
公开(公告)日：2009-06-23
申请号：US11901270
申请日：2007-09-14
IPC分类号： G08B3/10
CPC分类号： H04R1/406
摘要： A directional acoustic device configured for producing a directional output along an acoustic axis, including at least one transducer configured to create at least two wave trains which are directed along differing pathways by at least one wave guide, and so disposed that in directions more than ninety degrees off the acoustic axis the SPL of the output is greatly diminished by cancellation effects between the wave trains; improvement over previous gradient and quarter-wave pipe directional systems being enabled.
摘要翻译： 定向声学装置，其被配置用于沿着声轴产生定向输出，包括至少一个换能器，其构造成产生至少两个波段，所述至少两个波列通过至少一个波导引导沿着不同的路径，并且被设置为沿着超过九十 离开声轴，输出的SPL通过波列之间的抵消效应大大减少; 改进了以前的梯度和四分之一波导管系统的启用。
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公开(公告)号：US20090116660A1
公开(公告)日：2009-05-07
申请号：US11921822
申请日：2006-02-09
CPC分类号： H04R27/00 , H04R2217/03
摘要： Parametric sound reproduction in high-intensity audio signaling, for example in hailing and warning at relatively large distances, is disclosed in one example by producing a primary audio signal in the audio frequency range, and producing a secondary audio signal in the audio frequency range by modulation of the primary audio signal, wherein the primary signal is chosen to enable an improved effect, for example one of directional reproduction, exploiting greater sensitivity of human hearing, exploiting an efficient or maximum intensity frequency range of a transducer used to reproduce the audio signals, and another parameter effecting distance, intelligibility, or intensity of an audio signal.
摘要翻译： 在一个示例中，通过在音频范围中产生主音频信号，并且通过在音频频率范围内产生辅助音频信号，从而在音频频率范围内产生辅助音频信号，例如在高强度音频信号中的参数声音再现，例如在相对较大距离的呼叫和警告中 主要音频信号的调制，其中选择主信号以实现改进的效果，例如定向再现之一，利用人类听觉更大的灵敏度，利用用于再现音频信号的换能器的有效或最大强度频率范围 ，以及影响音频信号的距离，清晰度或强度的另一参数。
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公开(公告)号：US06704426B2
公开(公告)日：2004-03-09
申请号：US09753297
申请日：2001-01-02
申请人： James J. Croft, III
发明人： James J. Croft, III
IPC分类号： H04R2500
CPC分类号： H04R1/2842 , H04R1/2834 , H04R1/2849
摘要： A bandpass loudspeaker enclosure system including at least one electro-acoustic transducer with a vibratable diaphragm having a first acoustical coupling surface and a second acoustical coupling surface, and at least one differential area passive radiator with three separate acoustical coupling surface areas. The first acoustical coupling surface of the vibratable diaphragm is substantially air coupled through a first enclosure volume to a first of the three separate acoustical coupling surface areas of the at least one differential area passive radiator. A second of the three separate acoustical coupling surface areas of the at least one differential area passive radiator is substantially air coupled through a second chamber to the external environment through a restricted acoustic opening or passive acoustic radiator of predetermined characteristics. A third and largest of the three separate acoustical coupling surface areas of the at least one differential area passive radiator is acoustically coupled to the external environment, and the second acoustical coupling surface of the vibratable diaphragm is acoustically coupled into a third enclosure volume.
摘要翻译： 一种带通扬声器封闭系统，包括至少一个电声换能器，其具有具有第一声耦合表面和第二声耦合表面的可振动膜片，以及至少一个具有三个独立声耦合表面区域的差分区域无源辐射器。 可振动隔膜的第一声耦合表面基本上通过第一外壳体积耦合到至少一个差分区域无源辐射器的三个分离的声耦合表面区域中的第一个。 所述至少一个差分区域无源辐射器的三个独立的声耦合表面区域中的第二个通过第二腔室通过具有预定特性的有限声学开口或无源声辐射器实质上空气耦合到外部环境。 所述至少一个差分区域无源辐射器的三个独立的声耦合表面区域中的第三和最大的声耦合表面区域声耦合到外部环境，并且可振动隔膜的第二声耦合表面声耦合到第三封闭体积中。
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公开(公告)号：US06393129B1
公开(公告)日：2002-05-21
申请号：US09374813
申请日：1999-08-16
IPC分类号： H04R2500
CPC分类号： H04R19/00 , H04R19/02 , H04R23/02 , H04R2217/03
摘要： An electroacoustic transducer which includes at least one stator member with an operating surface positioned adjacent to an emitter diaphragm. The stator member is comprised of at least one stiff sheet of paper having perforations for acoustic transparency. The stator also includes a means to develop electrical conductivity and to receive an applied voltage. An emitter diaphragm is suspended adjacent to and spaced a sufficient distance from the operating surface of the stator member to enable diaphragm oscillation in response to an applied signal voltage. This arrangement permits diaphragm movement within at least one emitter section without creating restrictive contact on the operating surface of the stator member. The diaphragm may be composed of paper with electrical conductivity sufficient to receive an acoustic signal voltage from a voltage source and to vibrate as an acoustic emitter with respect to forces applied at the stator member. Alternatively, the stator member may be of conventional construction, and combined with an emitter diaphragm constructed of a paper composition. Electrical contacts are also positioned on the stator member and the emitter diaphragm for coupling to appropriate voltage sources.
摘要翻译： 一种电声换能器，其包括至少一个具有邻近发射器隔膜定位的操作表面的定子构件。 定子构件由至少一张具有用于声学透明度的穿孔的刚性纸片构成。 定子还包括显影电导率和接收施加电压的装置。 发射器隔膜与定子构件的操作表面相邻并且间隔开足够的距离，以响应于施加的信号电压使振动膜振动。 这种布置允许膜片在至少一个发射器部分内移动，而不会在定子构件的操作表面上产生限制性接触。 隔膜可以由具有足以从电压源接收声信号电压并且相对于施加在定子构件上的力作为声发射器振动的导电性的纸构成。 或者，定子构件可以是常规构造，并且与由纸组合物构成的发射器隔膜组合。 电触点也位于定子构件和发射器隔膜上，用于耦合到适当的电压源。
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