公开(公告)号：US07142688B2

公开(公告)日：2006-11-28

申请号：US10055821

申请日：2002-01-22

Applicant: James J. Croft, III ,  David Graebener

Inventor： James J. Croft, III ,  David Graebener

IPC: H04R25/00

CPC classification number: H04R9/047

Abstract: A planar-magnetic electro-acoustic transducer including a support structure and a magnetic structure carried by the support structure, the magnetic structure comprising a multiplicity of high-energy magnets configured so as to have shared loop field maxima and local loop field maxima, and a diaphragm carried by the support structure, comprising a plurality of conductors carried by and coupled to the diaphragm, said conductors being disposed in relation to local loop maxima and configured to exploit the energy of local loop maxima, as well as the energy of shared loop maxima in driving the diaphragm to produce an acoustic output; and the magnetic structure can be configured so that it includes magnet rows, and the transverse cross-sectional width of the magnets does not exceed their transverse cross-sectional height, and the distance between adjacent elongated magnet rows is greater than one half the width of either of the magnets of the adjacent magnet rows.

公开(公告)号：US20090097693A1

公开(公告)日：2009-04-16

申请号：US12079415

申请日：2008-03-25

Applicant: James J. Croft, III ,  David Graebener

Inventor： James J. Croft, III ,  David Graebener

IPC: H04R9/04 ,  H04R9/06

CPC classification number: H04R9/047 ,  H04R7/22 ,  H04R9/06

Abstract: A planar magnetic transducer having enhanced magnetic structures which increases performance over a signal-ended device but mitigates some of the drawback of double ended devices, including a supporting structure, a diaphragm incorporating a coil conductor at least primary magnetic structure, and a secondary magnetic structure can be added, including mitigation of high frequency resonance and attenuation by providing a more open architecture, including spacing the magnets wider apart, configuring the inter-magnet spaces to provide better acoustic performance, using high-energy magnets, which magnets can be shaped to form at least a part of the shaped inter-magnet space.

Abstract translation: 一种具有增强的磁结构的平面磁换能器，其增加了信号端装置的性能，但是减轻了双端装置的一些缺点，包括支撑结构，至少包含初级磁结构的线圈导体的振膜和辅助磁结构 可以通过提供更开放的架构来减轻高频谐振和衰减，包括使磁体间隔较宽，配置磁体间空间以提供更好的声学性能，使用高能磁体，磁体可以成形为 形成成形的磁体间空间的至少一部分。

公开(公告)号：US06934402B2

公开(公告)日：2005-08-23

申请号：US10075936

申请日：2002-01-25

Applicant: James J. Croft, III ,  David Graebener

Inventor： James J. Croft, III ,  David Graebener

IPC: H04R9/02 ,  H04R7/02 ,  H04R7/06 ,  H04R7/16 ,  H04R9/04 ,  H04R25/00

CPC classification number: H04R9/047 ,  H04R7/22 ,  H04R9/06

Abstract: A planar magnetic transducer having enhanced magnetic structures which increases performance over a single-ended device but mitigates some of the drawbacks of double ended devices, including a supporting structure, a diaphragm incorporating a coil conductor at least a primary magnetic structure, and a secondary magnetic structure can be added, including mitigation of high frequency resonance and attenuation by providing a more open architecture, including spacing the magnets wider apart, configuring the inter-magnet spaces to provide better acoustic performance, using high-energy magnets, which magnets can be shaped to form at least a part of the shaped inter-magnet space.

Abstract translation: 一种具有增强的磁结构的平面磁换能器，其增加了单端器件的性能，但是减轻了双端器件的一些缺点，包括支撑结构，包含至少一个主磁结构的线圈导体的隔膜和次级磁 可以添加结构，包括通过提供更开放的架构来减轻高频谐振和衰减，包括使磁体间隔较宽，配置磁体间空间以提供更好的声学性能，使用高能磁体，磁体可以被成形 以形成成形的磁体间空间的至少一部分。

公开(公告)号：US10090819B2

公开(公告)日：2018-10-02

申请号：US14978280

申请日：2015-12-22

Applicant: James J. Croft, III

Inventor： James J. Croft, III

IPC: H03G5/16 ,  H04R1/28 ,  H04R3/04 ,  H04R3/00

Abstract: 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.

公开(公告)号：US08194502B1

公开(公告)日：2012-06-05

申请号：US12100000

申请日：2008-04-09

Applicant: James J. Croft, III

Inventor： James J. Croft, III

IPC: H03G5/00

CPC classification number: G10K11/343

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07551062B2

公开(公告)日：2009-06-23

申请号：US11901270

申请日：2007-09-14

Applicant: James J. Croft, III ,  Wensen Liu ,  Clifton Wynn Thompson

Inventor： James J. Croft, III ,  Wensen Liu ,  Clifton Wynn Thompson

IPC: G08B3/10

CPC classification number: H04R1/406

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20090116660A1

公开(公告)日：2009-05-07

申请号：US11921822

申请日：2006-02-09

Applicant: James J. Croft, III ,  Wensen Liu ,  Elwood G. Norris

Inventor： James J. Croft, III ,  Wensen Liu ,  Elwood G. Norris

IPC: H04B3/00 ,  G08B3/00

CPC classification number: H04R27/00 ,  H04R2217/03

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06704426B2

公开(公告)日：2004-03-09

申请号：US09753297

申请日：2001-01-02

Applicant: James J. Croft, III

Inventor： James J. Croft, III

IPC: H04R2500

CPC classification number: H04R1/2842 ,  H04R1/2834 ,  H04R1/2849

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06393129B1

公开(公告)日：2002-05-21

申请号：US09374813

申请日：1999-08-16

Applicant: Terry J. Conrad ,  Elwood G. Norris ,  James J. Croft, III

Inventor： Terry J. Conrad ,  Elwood G. Norris ,  James J. Croft, III

IPC: H04R2500

CPC classification number: H04R19/00 ,  H04R19/02 ,  H04R23/02 ,  H04R2217/03

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20160112023A1

公开(公告)日：2016-04-21

申请号：US14978280

申请日：2015-12-22

Applicant: James J. Croft, III

Inventor： James J. Croft, III

IPC: H03G5/16 ,  H04R1/28 ,  H04R3/04

CPC classification number: H03G5/165 ,  H04R1/2811 ,  H04R1/2819 ,  H04R3/002 ,  H04R3/04 ,  H04R2430/03

Abstract: 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.

Abstract translation: 一种用于控制扬声器系统的声输出的较低频率声学范围的信号处理系统。 该系统包括用于接收至少一个第一声道音频信号的输入，该第一声道音频信号对应于具有振动膜片的至少一个电声换能器的至少一个扬声器的声输出。 信号处理系统包括至少一个转置增益控制器处理器，用于将音频信号的较低频率音频信号范围中的至少一个频带频带的幅度的至少一部分转换为至少一个转置中的增加的增益 低频音频信号范围内的目标频率。 转置增益控制器处理器包括至少一个静态或动态变换增益控制器中的至少一个。 该系统可以包括至少一个附加信号处理器，支持声输出的感知保真度的保留。