Communications, electrical: acoustic wave systems and devices inventions 08/06

20060193202 - Method and apparatus for high-frequency passive sonar performance prediction: A system and method for predicting passive, high-frequency sonar array performance at any underwater location, implemented as a software package running on a computer. An operator selects an arbitrary geographical location, specifies a sonar array and defines a target. The necessary bathymetry, and associated oceanographic, environmental and meteorological data are...

20060193203 - Apparatus for attenuating noise in marine seismic streamers: A marine seismic streamer has a hydrophone housing positioned in the streamer with the hydrophone housing having ends and rigid side walls, a hydrophone positioned in the hydrophone housing, a soft compliant solid material filling the housing, and openings in the hydrophone housing adapted to substantially permit passage of pressure...

20060193204 - Directional de-signature for seismic signals: The present invention provides a method and apparatus for directional de-signature of a seismic signal. The method includes forming a plurality of far-field signatures representative of a plurality of seismic signals having a plurality of take-off angles, associating a plurality of traces representative of a plurality of reflections of the...

20060193205 - Method and apparatus for true relative amplitude correction of seismic data for normal moveout stretch effects: The present invention provides a method and apparatus for arriving at true relative amplitude destretched seismic traces from stretched seismic traces. The method compensates for offset varying reflection interference effects due to normal moveout. Stretch factors β and also input spectra are determined for NMOR stretched seismic traces. Estimates are...

20060193206 - Signal-processing method and active sonar implementing same: The invention relates to the field of underwater acoustics and more particularly to the field of signal processing in a low frequency (LF) active sonar system. The present invention makes it possible to decrease the false alarm rate while retaining the classification of the objects. The subject of the invention...

20060193207 - Large area tightly coupled attitude, position, velocity, and acceleration mapping system: Systems and methods for monitoring and tracking transients caused by geological events are provided. The system comprises a sensor array and a central monitoring system. The central monitoring system is adapted to communicate with the sensor array. The sensor array measures motion at a plurality of locations and transmits time...

20060187753 - Acoustic ranging by application of linear period modulated sound: A method and apparatus is provided for acoustic ranging by application of linear period modulated sound. In one aspect of the instant invention, an apparatus is provided for acoustic ranging by application of linear period modulated sound. The apparatus includes at least one source adapted to generate at least one...

20060187754 - Method of determining impulse responses from a medium in relation to the transmission of waves between different points: The invention relates to a method of determining impulse responses from a medium (2) in relation to the transmission of waves between different points (T1-TN). The inventive method consists in: transmitting waves in the medium by generating, at each point j, signals ei(t) each comprising n elementary signals with respective...

20060187755 - Methods and systems for communicating data through a pipe: An acoustic telemetry system includes a piezoelectric stack at least partially disposed within a segment of pipe, and electrical circuitry for controlling the piezoelectric stack. In response to a signal from the electrical circuitry, the piezoelectric stack generates a plurality of acoustic signals for transmission through the pipe at different...

20060187756 - Universal replaceable back radar: The present invention discloses a universal replaceable back radar, wherein a head sleeve and a vehicle-reversing module thereof are separately designed and coated, an ultrasonic head is coupled to the connecting block of the vehicle-reversing module, an angle-adjust pad is also clamped to the connecting block of the vehicle-reversing module,...

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 supported...

20060176774 - Apparatus and methods for controlling position of marine seismic sources: Apparatus and methods are described for remotely controlling position of marine seismic equipment. One apparatus comprises a source connected to a tow member; and an adjustment mechanism connected to the source and the tow member, the adjustment mechanism adapted to actively manipulate an angle of attack of the source. It...

20060176775 - Apparatus and methods for seismic streamer positioning: Apparatus, systems and methods for connecting two seismic streamers are disclosed that enable two streamers to be towed in a desired arrangement. One apparatus comprises an elongate member having a first portion and a second portion, and an orientation member connected to the elongate member between the first and second...

20060171253 - Coupling aid for seismic cable: The present invention provides a coupling device (300). The coupling device includes a collar (315, 405) defining an opening tberethrough to receive a seismic sensor (305) such that the collar (315, 405) permits rotation about the seismic sensor (305) and at least three extensions (320, 410) from the collar, the...

20060171254 - Image data processing device, method of processing image data and storage medium storing image data processing: An image data processing device has an image identifying unit and a file generating unit. The image identifying unit identifies a common image that is common to each page and a non-common image that differs from page to page on the basis of inputted image data including a plurality of...

20060171255 - Method and system for measuring the velocity of a vessel relative to the bottom using velocity measuring correlation sonar: A method and a system for measuring the velocity of a vessel relative to the bottom using a velocity measuring correlation sonar are disclosed. The present invention provides a new theoretical expression for the bottom medium sonar array temporal and spatial correlation function. The velocity of the vessel relative to...