公开(公告)号：US5537479A

公开(公告)日：1996-07-16

申请号：US235552

申请日：1994-04-29

Applicant: Kenneth W. Kreisel ,  Lester M. Field

Inventor： Kenneth W. Kreisel ,  Lester M. Field

IPC: H04R1/02 ,  H04R3/00

CPC classification number: H04R1/02 ,  H04R3/00

Abstract: A modification and addition to the prior art type of multiple driver push-pull loudspeaker system for subwoofer, bass, or lower midrange frequencies, which prior system is able to reduce the even-order push-pull out-of-phase driver-produced 2nd, 4th, etc. distortion harmonics by the order of 15 to 25 dB in the radiated sound waves. The present invention reduces the important remaining in-phase distortion harmonics using outputs of sensors mounted on the voice coils of each driver to generate electrical signals which are processed and used to substantially lower the remaining in-phase distortion with feedback through a single signal amplifier chain. The present invention contributes from 15 to 30 dB of in-phase distortion reduction of odd-order harmonics and, at relatively high sound power levels only, also reduces some in-phase, relatively lower level, even-order distortion. In addition, separate electrical outputs processed from sensor motion can provide pure even-order harmonics in real time, which outputs can be made available for other possible uses. Obviously, the relatively pure odd-order harmonics normally fed to a mixer in the signal amplifier chain could also be used as a separate output if desired.

Abstract translation: 对于现有技术类型的用于重低音扬声器，低音或较低中频的多驱动器推挽扬声器系统的修改和补充，其中先前的系统能够减少偶数阶推拉异步驱动器产生的第二 ，第4等等，在辐射声波中的畸变谐波为15至25dB的数量级。 本发明使用安装在每个驱动器的音圈上的传感器的输出来减少重要的剩余同相畸变谐波，以产生被处理并用于通过单个信号放大器链的反馈来显着降低剩余的同相失真的电信号 。 本发明有助于奇数次谐波的15至30dB的同相失真减小，并且仅在相对较高的声功率级别下，也减少了一些同相，相对较低电平的偶次失真。 另外，从传感器运动处理的单独电气输出可以实时提供纯正的偶次谐波，哪些输出可用于其他可能的用途。 显然，如果需要，通常馈送到信号放大器链中的混频器的相对纯的奇次谐波也可以被用作单独的输出。

公开(公告)号：US4000367A

公开(公告)日：1976-12-28

申请号：US632281

申请日：1975-11-17

Applicant: Lester M. Field

Inventor： Lester M. Field

IPC: G02B27/22 ,  G03B21/56 ,  H01J29/89 ,  H04N5/65

CPC classification number: G02B27/2221 ,  G03B21/56 ,  H01J29/89 ,  H01J2229/8901 ,  H01J2229/8907

Abstract: Embodiments of an apparatus and design principles for its operation have been devised such that when these embodiments are placed at the screen of a television set (preferably color) or at a movie screen or at an appropriate photograph, a highly noticeable observation of depth is produced. This is done without apparatus at the eyes and without using multiple images as in stereoscopy.

Abstract translation: 已经设计了用于其操作的装置和设计原理的实施例，使得当这些实施例被放置在电视机（优选为彩色）的屏幕上时，或者在电影屏幕或适当的照片时，产生了高度可察觉的深度观察 。 这是没有装置在眼睛没有使用多个图像在立体镜。