"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Application No. | Application Title | Issue Date |
| 20110255375 | ACOUSTIC WAVE TRANSDUCER AND SONAR ANTENNA WITH IMPROVED DIRECTIVITY The invention relates to an acoustic wave transducer that includes at least one electroacoustic motor (1, 21), a horn (4, 24) having an inner wall and an outer wall, a counterweight (5), and a hollow housing (8, 28) having an inner wall and a... | 10/20/2011 |
| 20110075520 | SEISMIC SOURCE WHICH INCORPORATES EARTH COUPLING AS PART OF THE TRANSMITTER RESONANCE An acoustic energy source for imparting acoustic energy into the Earth's subsurface includes an electrically driven transducer coupled to a source of swept frequency alternating current. A tunable Helmholtz resonator is disposed proximate the transducer. In one example,... | 03/31/2011 |
| 20110026366 | Water Inflatable Volumetric Hydrophone Array A hydrophone array includes an inflatable shaped housing enclosing an interior space and formable between a collapsed configuration and an expanded configuration, a framework of compliant material disposed within the interior of the inflatable housing, and a plurality o... | 02/03/2011 |
| 20100313659 | SEISMIC STREAMER There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterised by a buffer layer 2 which is provided with a cut-out 50 and a sensor element arranged in the cut-out 50. There is als... | 12/16/2010 |
| 20100103775 | SONAR IMAGING SYSTEM FOR MOUNTING TO WATERCRAFT A system for use with a boat to provide underwater sonar images includes a GPS receiver for providing GPS position data, a left side scan sonar transducer for transmitting left side scan sonar pulses and for receiving left side scan sonar return signals, and a right sid... | 04/29/2010 |
| 20090303838 | Acoustic Sensor and Method The invention relates to a sensor apparatus (30) operable to receive and process acoustic signals. The sensor apparatus comprises at least one acoustic transducer (32) operative to produce a change in an electronic output signal in response to receipt of a... | 12/10/2009 |
| 20090257317 | Macrosonic Generator for the Air-Based Industrial Defoaming of Liquids This invention refers to a sonic and/or ultrasonic generator for emission in air with a power capacity and certain radiation characteristics which permit the necessary acoustic levels (>170 dB ref. 2·10−4 μbar) to be obtained in a way that is safe and ... | 10/15/2009 |
| 20060181960 | Acoustic stimulation method with axial driver actuating moment arms on tines A method for generating acoustic waves, the method having the steps of: extending a tine from a support structure so that a proximal end of the tine is attached to the support structure and a distal end of the tine is uninhibited; positioning an oscillator so as to be s... | 08/17/2006 |
| 20050083785 | Heating apparatus using surface acoustic wave The present invention provides new applications for surface acoustic waves. A heating apparatus with a surface acoustic wave generator is disclosed. In one embodiment of the invention, a heating apparatus comprise a surface acoustic wave generator having a piezoelectric... | 04/21/2005 |