| Patent Number |
Title Of Patent |
Date Issued |
| 6728389 |
Membrane support system |
April 27, 2004 |
| A system for tensioning a membrane within a frame for a loudspeaker or a microphone is characterized by a frame containing an opening, a membrane connected to an exterior surface of the frame and spanning the frame opening, and a tensioning device connected with the frame for deflecting |
| 6577742 |
Membrane support system |
June 10, 2003 |
| A system for tensioning a membrane within a frame for a loudspeaker or a microphone is characterized by a frame containing an opening, a membrane connected to an exterior surface of the frame and spanning the frame opening, and a tensioning device connected with the frame for deflecting |
| 5297214 |
Loudspeaker structure |
March 22, 1994 |
| A dipole loudspeaker includes a rigid support containing an opening and a generally planar multi-layered flexible diaphragm mounted on the support and extending across the opening. The diaphragm is formed of a plurality of layers of thin flexible membrane material, each of the layers hav |
| 5148493 |
Loudspeaker structure |
September 15, 1992 |
| A dipole loudspeaker includes a rigid support containing an opening and a generally planar multi-layered flexible diaphragm mounted on the support and extending across the opening. The diaphragm is formed of a plurality of layers of thin flexible membrane material, each of the layers hav |
| 4939784 |
Loudspeaker structure |
July 3, 1990 |
| A dipole loudspeaker includes a rigid support containing an opening and a generally planar multi-layered flexible diaphragm mounted on the support and extending across the opening. The diaphragm is formed of a plurality of layers of thin flexible membrane material, each of the layers hav |
| 4567607 |
Stereo image recovery |
January 28, 1986 |
| A method and apparatus for improving the accuracy in locating psychoacoustic images in plural channels of related audio signals. Signals are cross-fed from one channel to another in an out-of-phase relationship with respect to the signals in the other channel. The phase relationship |
| 4495637 |
Apparatus and method for enhanced psychoacoustic imagery using asymmetric cross-channel feed |
January 22, 1985 |
| Enhanced pyschoacoustic imagery is achieved in an audio signal processing circuit for processing plural channels of related audio signals. Asymmetric bi-directional audio signal cross-feed is established between first and second audio signal processing channels, for example. The cros |
| 4204092 |
Audio image recovery system |
May 20, 1980 |
| A high fidelity playback system is described using a plurality of speakers in conjunction with a conventional stereo system and an auditory interface unit which provides improved high fidelity playback. The system includes for example, two front high fidelity speakers in the normal stere |
