Communications, electrical: acoustic wave systems and devices inventions 06/06

20060140053 - Sensor arrangement and method for the installation and moving of this: Arrangement for use for seismic surveys of geological formations in a seabed, where a plurality of such arrangements, which are provided with sensor units 26, are placed on the seabed for collecting pressure waves and shear waves reflected from the geological formations. There exist arrangements for transferring seismic data to...

20060140054 - Noise adaptive sonar signal processor: A system and method of performing sonar range estimations in a noisy sonar environment. The system includes a sensor, a transmitter, a receiver, a plurality of band-pass filters, a cross correlator, and a data analyzer. The transmitter transmits a pulse through a transmission medium. The pulse travels through the transmission...

20060133198 - Large area transducer array: A large area transducer array comprising a substrate having a front side and a backside, a plurality of transducers disposed on the front side of the substrate and patterned in the form of a two-dimensional transducer array in the X-Y plane, a plurality of connectors disposed on the backside of...

20060133199 - Apparatus for steering a marine seismic streamer via controlled bending: A marine seismic streamer steering device comprises at least two hinged sections pivotally coupled to each other and connected between two adjacent sections of the seismic streamer, and a bend control unit that controls bending of the hinged sections relative to the longitudinal axis of the seismic streamer. The steering...

20060133200 - Apparatus for steering a marine seismic streamer via controlled water ejection: A marine seismic streamer steering device comprises a body connected between two adjacent sections of the seismic streamer, at least one inlet port on the body, a plurality of outlet ports on the body, and a port control unit which controls water flow through the plurality of water outlet ports....

20060133201 - Universal seismic cable connector: A hermaphroditic connector for a multiple conduit cable assembly comprises a cylindrical protective collar surrounding an inner cylindrical core. The collar is axially secured to the inner core but partially rotatable about the core. The distal end of the collar is formed to rotatively mesh with another collar of the...

20060133202 - Motion sensors in a marine seismic streamer: An apparatus is disclosed for determining particle motion in a body of water. The apparatus includes a cable adapted to be towed in the water by a vessel. A first sensor responsive to particle motion in the water is coupled to the cable. A second sensor responsive to particle motion...

20060133203 - Method and apparatus for acoustic detection of a fluid leak behind a casing of a borehole: An acoustic detection of a discrete acoustic signal allows to detect a leak behind a casing (23) of a borehole. An acoustic amplitude (AA) is sampled during a recording time period (24;64) at a determined position along the tube. Time intervals (26;66) are defined inside of the recording time period...

20060133205 - Determination of the impedance of a material behind a casing combining two sets of ultrasonic measurements: The invention provides a method for estimating an impedance of a material behind a casing wall, wherein the casing is disposed in a borehole drilled in a geological formation, and wherein a borehole fluid is filling said casing, the material being disposed in an annulus between said casing and said...

20060133204 - Method to measure and locate a fluid communication pathway in a material behind a casing: The invention provides a method for measuring and locating a fluid communication pathway in a material behind a casing wall, wherein said material is disposed in an annulus between said casing and a geological formation, and said method comprising: measuring a set of parameters of the material behind the casing...

20060133206 - Fault filter for seismic discontinuity data: Various methods are disclosed for identifying faults in a seismic data volume. In some method embodiments, the fault identification method comprises determining a planarity value for each of multiple positions of an analysis window in the data volume. The planarity value may be indicative of the planarity of discontinuities in...

20060133207 - Amplitude correction for seismic recordings: A new approach is described based on reciprocity for estimating acquisition-related effects, which has several advantages over conventional surface-consistent processing techniques: (i) It can be applied to complete recordings, hence does not require the isolation of primary reflections in the data, (ii) no assumptions are imposed on the subsurface, and...

20060133208 - Method of determining specular information after prestack seismic imaging: A method of determining the specular source/receiver pairs associated with seismic images produced from a transformation of multi-offset seismic wave records as a function of time in the depth domain is disclosed which as subsoil seismic imaging applications. When using a prestack depth migration algorithm of Kirchhoff type, one also...

20060133210 - Sonar: A sonar emits an ultrasonic wave into the water from a transducer on the basis of a transmission signal outputted from a transmission circuit, receives an echo reflected in the water with the transducer and converts the echo into an electric signal, and displays underwater information on a display unit...

20060133209 - Ultrasonic distance sensors: A lithographic apparatus comprises an illumination system, a support constructed to support a patterning device, and a projection system. In pixel grid imaging, a large number of small optical spots are imaged onto the substrate surface using a micro-lens array (MLA). The z position of the MLA is adjustable in...

20060133211 - Method and apparatus for acoustic source tracking using a horizontal line array: An apparatus for processing passive acoustic signals received on a horizontal line array that were either emitted from an underwater object or echo returned from an object, is proposed to track the motion (bearing change and range change) of an object (target) relative to the receiver horizontal line array. Adaptive...

20060133212 - Portable low frequency projector: A portable low frequency underwater acoustic projector having two circular diaphragms separated by a spacer ring with a pair of coils and oscillating masses being located in pipes connected to central opening in two diaphragms, the coils driving these masses in opposite directions. Central openings in each diaphragm have an...

20060126432 - Marine seismic streamer and method for manufacture thereof: A seismic streamer includes a jacket covering an exterior of the streamer. At least one strength member extends along the length of the jacket. The strength member is disposed inside the jacket. Seismic sensors are disposed at spaced apart locations along the interior of the jacket. A flexible, acoustically transparent...

20060126433 - Seismic exploration: The present invention provides a seismic exploration and imaging system for producing seismic survey reports of subsea geological structures. The exploration system provides a method in which both P-waves and S-waves are detected without the need for placing detection apparatus in contact the seabed. A seismic event is applied (12)...

20060126434 - Estimation of background noise and its effect on sonar range estimation: A system (100) and method for estimating the signal-to-noise ratio (SNR) in a sonar environment and for determining the effect of the estimated SNR on sonar ranging accuracy. The system includes a sensor (102), a transmitter (103), a receiver (104), a plurality of band-pass filters (106), a cross correlator (108),...

20060126435 - Ultrasound sensor and ultrasound measurement device: An ultrasound sensor consists of an optical fiber having an active portion with high birefringence and two non-active portions located at each end of the active portion. A bragg grating is provided in the fiber. An ultrasound measurement device includes an ultrasound sensor with an excitation source for the fiber...

20060114746 - Acoustic telemetry system using passband equalization: An embodiment includes a method comprising receiving an acoustic signal that is modulated along a jointed tubing. The method also includes performing equalization over a passband of the acoustic signal to generate an equalized signal....

20060114747 - Identification of the channel frequency response using chirps and stepped frequencies: The transfer function of the communication channel in a mud pulse telemetry system is determined by sending a known signal through the channel and spectral analysis of the received signal. The known signal may be a chirp signal or a stepped frequency signal. Based on the determined transfer function, operating...

20060114748 - Underwater exterior ship hull imaging system employing a remote microprocessor controlled acoustic transducer array: A multi-beam acoustic transducer array system for producing color enhanced, three dimensional, high resolution images of a ship's underwater hull, wherein the acoustic transducers can be mounted in orthogonal pairs, each pair being positioned opposite from another pair within a shipping channel. The array can be utilized either in a...

20060114749 - Gunshot detection sensor with display: A system for locating and identifying an acoustic event such as gunfire. The inventive system employs a plurality of man wearable acoustic sensors for detecting gunfire, each acoustic sensor having a display associated therewith for displaying information concerning the acoustic event to a user. In preferred embodiments, the sensor includes...