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公开(公告)号：US20080129470A1
公开(公告)日：2008-06-05
申请号：US11901270
申请日：2007-09-14
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：US20080239876A1
公开(公告)日：2008-10-02
申请号：US11901971
申请日：2007-09-18
IPC分类号： H04B1/02
CPC分类号： G08B15/00
摘要： An acoustic human and animal behavior modification system that is capable of creating a zone of exclusion immediately adjacent a surface vehicle comprises an array of acoustic transducers disposed on the vehicle in a location not readily seen nor accessible by humans adjacent the vehicle, and is configured to project an acoustic output radially outward in a radial sector at sound pressure levels above the ordinary human pain threshold to motivate animals and humans to move away from a vehicle or change their behavior.
摘要翻译： 一种声学人体和动物行为修改系统，其能够在紧邻表面车辆的地方形成排除区域，其包括在邻近车辆的人不容易看到且不被人接近的位置处设置在车辆上的声学换能器阵列，并且被配置为 在高于普通人类疼痛阈值的声压水平下在径向扇区径向向外投射声学输出，以激励动物和人类离开车辆或改变其行为。
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公开(公告)号：US5109416A
公开(公告)日：1992-04-28
申请号：US590087
申请日：1990-09-28
申请人： James J. Croft
发明人： James J. Croft
摘要： A dipole speaker for use with a multichannel sound reproduction system for producing an acoustical ambience signal. The dipole speaker comprises a transducer which is connected to the sound reproduction system so that it receives a difference signal from between the channels thereof. The transducer may be a unitary loudspeaker or a pair of identical, outward-facing loudspeakers. In response to a difference signal, the transducer generates first and second sound pressure lobes which extend in opposite directions from the dipole speaker, and which are 180 degrees out of phase so that they cancel one another out to produce a null zone which extends in a plane about the speaker. The dipole speaker is used in conjunction with conventional direct-path speakers which are connected to the sound reproduction system. The dipole speaker is positioned in a defined listening area so that the null zone is aligned towards the listener to avoid any sound travelling along a direct path from the speaker to the listener, and the sound pressure lobes are directed towards the walls of the listening area so that the acoustic signal of the dipole speaker is reflected therefrom and arrives at the listener by way of indirect paths. The acoustic signal of the dipole speaker is thus sensed by the listener as arriving from various directions, and its arrival is delayed relative to the arrival of the acoustic output of the direct-path speakers due to the longer lengths of the indirect paths, both of which enhance the ambience of effect of the acoustic output of the dipole speaker.
摘要翻译： 一种用于产生声学环境信号的多声道声音再现系统的偶极扬声器。 偶极扬声器包括连接到声音再现系统的换能器，以便它从其通道之间接收差分信号。 换能器可以是单一的扬声器或一对相同的向外扬声器。 响应于差分信号，换能器产生第一和第二声压波瓣，其从偶极扬声器以相反方向延伸，并且相位相差180度，使得它们彼此抵消以产生在 飞机关于扬声器。 偶极扬声器与连接到声音再现系统的常规直通扬声器结合使用。 偶极扬声器位于限定的收听区域中，使得零区域对准收听者，以避免沿着从扬声器到收听者的直接路径行进的任何声音，并且声压波瓣指向收听区域的墙壁 使得偶极扬声器的声信号从其反射并通过间接路径到达收听者。 偶极扬声器的声学信号因此由收听者感测为从各个方向到达，并且由于间接路径的较长的长度，它的到达相对于直通扬声器的声输出的到达被延迟 这增强了偶极扬声器的声输出效果的氛围。
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公开(公告)号：US4803733A
公开(公告)日：1989-02-07
申请号：US942879
申请日：1986-12-16
申请人： Robert W. Carver , James J. Croft
发明人： Robert W. Carver , James J. Croft
CPC分类号： H04R7/18 , H04R9/047 , Y10T29/49005
摘要： A loudspeaker diaphragm mounting system where there is a perimeter frame to which is mounted a planar flexible diaphragm having electrically conductive elements thereon. The frame has two perimeter sections which have matching perimeter grooves to receive an elongate tensioning member which presses the edge portion of the diaphragm into at least one of the grooves. By controlling the force with which the two frame sections are pushed together, tension on the diaphragm can be controlled.
摘要翻译： 扬声器隔膜安装系统，其中存在周边框架，其上安装有具有导电元件的平面柔性隔膜。 该框架具有两个周边部分，该周边部分具有匹配的周边凹槽，以接收将隔膜的边缘部分压入至少一个凹槽中的细长张紧构件。 通过控制两个框架部分被压在一起的力，可以控制隔膜上的张力。
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公开(公告)号：US20080175404A1
公开(公告)日：2008-07-24
申请号：US12006108
申请日：2007-12-28
申请人： Jeevan G. Bank , James J. Croft
发明人： Jeevan G. Bank , James J. Croft
CPC分类号： H03F3/2173 , H03F3/181 , H03F3/2171 , H03F3/2178 , H03F2200/541
摘要： A method for minimizing the reactance of a reactive load transducer at a carrier frequency in an amplifier with a power output stage for amplifying a signal, comprises: supplying a signal to the power output stage of the amplifier which includes at least one reactive component coupled to the amplifier; and counteracting transducer reactance at a carrier frequency by interacting the signal with the at least one reactive component.
摘要翻译： 一种用于使具有用于放大信号的功率输出级的放大器中的载波频率处的无功负载传感器的电抗最小化的方法包括：向放大器的功率输出级提供信号，该功率输出级包括至少一个耦合到 放大器; 以及通过将所述信号与所述至少一个无功分量相互作用来抵消载波频率处的换能器电抗。
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公开(公告)号：US20080137872A1
公开(公告)日：2008-06-12
申请号：US11986568
申请日：2007-11-20
申请人： James J. Croft
发明人： James J. Croft
IPC分类号： H04R29/00
CPC分类号： H04S3/002 , H04S3/00 , H04S2400/13
摘要： A signal processing system for use in a multi-channel audio system. The signal processing system includes a first channel having a first audio signal. A second channel is included that has at least a second audio signal. A processor is included that is responsive to a signal level threshold in the first channel, such that at the threshold and above the threshold, a portion of the first channel audio signal is mixed into the at least a second audio channel.
摘要翻译： 一种用于多声道音频系统的信号处理系统。 信号处理系统包括具有第一音频信号的第一信道。 包括具有至少第二音频信号的第二通道。 包括响应于第一通道中的信号电平阈值的处理器，使得在阈值和阈值之上，第一通道音频信号的一部分被混合到至少第二音频通道中。
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