公开(公告)号：US4944018A

公开(公告)日：1990-07-24

申请号：US383295

申请日：1989-07-18

申请人： Amar G. Bose ,  Joseph L. Veranth

发明人： Amar G. Bose ,  Joseph L. Veranth

IPC分类号： H03G3/32

CPC分类号： H03G3/32

摘要： A vehicle has an engine and a sound amplifying system characterized by a frequency response including a signal source and a manually operable sound level setting control that establishes the sound level of the desired signal in the vehicle, a power amplifier and an electroacoustical transducer. The manually operable sound level setting control comprises a dynamic equalization circuit for providing a predetermined equalization over the bass frequency range depending on the sound level setting of the sound level setting control. A variable gain device associated with the sound level setting control responds to an input electrical audio signal to be amplified by the system for providing a signal of controlled amplitude. The variable gain device controls the gain of the system to increase and decrease in response to the engine being on and off respectively. The manually operable sound level setting control changes the frequency response of the system when altering the gain of the system much more significantly than when the variable gain device alters the gain such that the frequency response with the engine being on is always different from the frequency response with the engine being off.

摘要翻译： 车辆具有发动机和声音放大系统，其特征在于包括信号源和手动可操作的声级设置控制的频率响应，其建立车辆中的期望信号的声级，功率放大器和电声换能器。 手动操作的声级设置控制包括一个动态均衡电路，用于根据声级设置控制的声级设置，在低音频率范围上提供预定均衡。 与声级设置控制相关联的可变增益设备响应于要由系统放大以输入受控幅度的信号的输入电音频信号。 可变增益装置控制系统的增益，以响应于发动机分别开启和关闭而增加和减少。 与可变增益装置改变增益相比，当改变系统的增益时，可手动操作的声级设置控制改变了系统的频率响应，使得与引擎的频率响应始终不同于频率响应 发动机关闭。

公开(公告)号：US5033577A

公开(公告)日：1991-07-23

申请号：US280707

申请日：1988-12-06

申请人： Joseph L. Veranth

发明人： Joseph L. Veranth

IPC分类号： H04S1/00 ,  H04R1/28 ,  H04R5/02 ,  H04S3/00 ,  H04S7/00

CPC分类号： H04R1/2842 ,  H04R1/2834 ,  H04R5/02

摘要： Stereo electroacoustical transducing apparatus for providing acoustical reproduction in a room at least partially bounded by a room bounding surface including a floor, sidewalls, and a ceiling, the apparatus including a nonlocalizable woofer module that is mounted outside of the room and communicates with an opening in the room bounding surface, upper frequency drivers located within the room, and electronics for providing audio electrical signals to the nonlocalizable woofer module and the upper frequency drivers.

公开(公告)号：US6055420A

公开(公告)日：2000-04-25

申请号：US51321

申请日：1993-02-18

申请人： Joseph L. Veranth

发明人： Joseph L. Veranth

IPC分类号： H01Q7/00 ,  H01Q9/04 ,  H04B1/18

CPC分类号： H01Q9/0442 ,  H01Q7/005 ,  H04B1/18

摘要： A tunable antenna system for operation over a predetermined frequency range includes a high Q antenna having a length and width each significantly less than a quarter wavelength within the predetermined frequency range. A controllable reactive element is coupled to the antenna and has a variable reactance for tuning the antenna in a high Q resonant circuit to the frequency of a desired signal in the frequency range coupled to the antenna. An antenna tuning circuit responsive to the frequency to which the antenna is tuned provides an antenna tuning signal to the controllable reactive element so that the antenna remains tuned to the frequency of the desired signal.

摘要翻译： 用于在预定频率范围内操作的可调谐天线系统包括具有在预定频率范围内显着小于四分之一波长的长度和宽度的高Q天线。 可控电抗元件耦合到天线，并且具有用于将高Q谐振电路中的天线调谐到耦合到天线的频率范围内的期望信号的频率的可变电抗。 响应天线被调谐的频率的天线调谐电路提供天线调谐信号到可控电抗元件，使得天线保持调谐到期望信号的频率。

公开(公告)号：US4146744A

公开(公告)日：1979-03-27

申请号：US719949

申请日：1976-09-02

申请人： Joseph L. Veranth

发明人： Joseph L. Veranth

IPC分类号： H04R1/28

CPC分类号： H04R1/2819 ,  H04R1/227 ,  H04R1/2826 ,  H04R1/2834 ,  H04R3/12

摘要： A multiple driver loudspeaker system comprises two angularly spaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers with a port tube passing through the center of each rear baffle and the junction therebetween. A front baffle carries a small centrally located loudspeaker. The front loudspeaker is backed by a cavity that is vented through the port tube at the intersection between the rear baffles. Each of the remaining loudspeakers is backed by a cavity with the four cavities associated with each rear baffle being vented through the associated port tube through channels located at the front of each cavity. Two bullets are cantilevered from the front baffle rearward and essentially concentric within the respective centrally located ports. The volume of each of the nine cavities is substantially the same. The nine loudspeakers are connected in phase and in series and energized through an active equalizer having a sharp low-frequency cutoff that prevents the loudspeakers from being energized with appreciable energy much below the port tube and cavity resonance of each ported enclosure, typically 40 Hz while coacting with the loudspeakers to provide substantially uniform acoustic power radiation over substantially the full audio frequency range. In an alternative embodiment of the invention there is a common cavity behind eight drivers, and a pair of port tubes include damping material inside to lower the Q of the resonant elements comprising the cavity and port tubes.

公开(公告)号：US3953806A

公开(公告)日：1976-04-27

申请号：US322923

申请日：1973-01-12

申请人： Joseph L. Veranth

发明人： Joseph L. Veranth

IPC分类号： H03F3/08 ,  H03F17/00

CPC分类号： H03F3/08 ,  H03F17/00

摘要： A sequence of light emitting diodes are progressively illuminated with progressively increasing instantaneous amplifier output signal amplitude with the last pair of light emitting diodes illuminated simultaneously to indicate amplifier clipping.

摘要翻译： 一系列发光二极管随着逐渐增加的瞬时放大器输出信号幅度而逐渐照明，同时最后一对发光二极管同时点亮以指示放大器限幅。