Abstract: An ultrasound imaging system according to the present disclosure may include an ultrasound probe, a display unit, and a processor configured to receive source image data having a first dynamic range, wherein the source image data comprises log compressed echo intensity values based on the ultrasound echoes detected by the ultrasound probe, generate a histogram of at least a portion of source image data, generate a cumulative density function for the histogram, receive an indication of at least two points on the cumulative density function (CDF), and cause the display unit to display an ultrasound image representative of the source image data displayed in accordance with the second dynamic range.

Abstract: A method of seismic exploration above a region of the subsurface containing structural or stratigraphic features conducive to the presence, migration, or accumulation of hydrocarbons comprises accessing at least a portion of a blended seismic source survey, separating the at least two interfering seismic source excitations using inversion separation, producing one or more source gathers based on the separating, and using the one or more source gathers to explore for hydrocarbons within said region of the subsurface. The blended source seismic survey contains at least two interfering seismic source excitations therein, and the seismic source excitations can be produced by seismic source types having different signatures or frequency characteristics.

Abstract: Processes and systems for deblending blended seismic data with attenuated source signatures and free-surface effects are described. The blended seismic data may have been recorded in a marine survey in which multiple sources are activated in the body of water above a subterranean formation. Receivers record overlapping pressure and vertical velocity wavefield responses from the subterranean formation as corresponding blended pressure wavefield and blended vertical velocity wavefield. Processes and systems compute an upgoing pressure wavefield and a downgoing vertical velocity wavefield based on the blended pressure wavefield and blended vertical velocity wavefield. Deblended primary pressure wavefields are computed based on the upgoing pressure and downgoing vertical velocity. The deblended primary pressure wavefields may be used to generate images of the subterranean formation that are substantially free of source signatures and free-surface effects.

Abstract: A lidar system, including a base, a sensor body, and a motor having a shaft. The motor is affixed to the base, and can drive the sensor body in rotation with respect to the base. An LED device and a light sensor are each mounted upon the sensor body. A data processing device is also mounted upon the sensor body, and is programmed to produce range information based upon the sensor data. The shaft carries two slip rings. The LED, the sensor and the data processing device all receive electrical power via the two slip rings. The data processing device is configured to transmit the range information via the two slip rings using pulse width modulation.

Abstract: Techniques are disclosed relating to reducing noise in geophysical marine survey data. Such techniques may include adapting an initial set of noise templates to recorded seismic data to generate adapted noise templates and estimating a noise component in the recorded seismic data. The estimating may include determining a degree to which noise and signal components are correlated in the recorded seismic data and masking the recorded seismic data proportionally to the degree of correlation. The adapted noise templates may then be further adapted to a difference between the estimate of the noise component and the noise templates themselves. Resultant noise templates may then be applied to denoise the recorded seismic data.

Abstract: A method is described for seismic modeling implemented on a computer system including multiple computer nodes, which includes receiving, at a computer processor, a 4D speed of sound in water library and a marine seismic survey geometry; creating, via the computer processor, a full survey 3D Earth model for each seismic shot time based on the 4D speed of sound in water library to generate a set of dynamic 3D Earth models; simulating 4D seismic shots for the set of dynamic 3D Earth models by simulating multiple shots on each node to generate a set of 4D seismic shot gathers; and outputting the 4D seismic shot gathers.

Abstract: A virtual seismic shot record is generated based at least in part on seismic interferometry of the passive seismic data. Then, a frequency bandwidth of the virtual seismic shot record is determined, wherein the frequency bandwidth comprises a plurality of frequencies. The virtual seismic shot record is transformed into a frequency-dependent seismic shot record based on a first frequency of the plurality of frequencies. Further, a phase shift is applied to the frequency-dependent seismic shot record. A first velocity model is generated from the phase shifted frequency-dependent seismic shot record. A second velocity model may be generated using full-waveform inversion (FWI). One or more depth slices are identified from the second velocity model. A seismic image is generated based on the one or more depth slices for use with seismic exploration above a region of subsurface including a hydrocarbon reservoir and containing structural features conducive to a presence, migration, or accumulation of hydrocarbons.

Abstract: An ultrasonic device includes a driving circuit to provide drive power, a first transducer array to generate ultrasonic waves, the first transducer array being connected to receive power from the driving circuit, and a second transducer array to detect reflected or elicited ultrasonic waves incident on the device from a target and generate a signal based on those waves, the second transducer array being acoustically transmissive and disposed over the first transducer array such that the generated ultrasonic waves pass through the second transducer array. The second array is tuned to operate on top of the first. The functions of the two arrays may be reversed and the array tuned to operate with the first array receiving and the second array transmitting.

Abstract: According to various embodiments, systems and methods for transmitting acoustic waves in a region aided by reflection from environmental objects. An arrangement of acoustically reflective surfaces in an environment of a target can be detected to generate an environmental acoustic propagation channel model. An acoustic radiation pattern for reflecting one or more acoustic waves off of one or more acoustically reflective surfaces in the arrangement of acoustically reflective surfaces towards the target can be identified. A coherent acoustic beamforming device can be controlled to perform coherent beamforming of an acoustic hologram based on the acoustic radiation pattern to generate the one or more acoustic waves for reflection towards the target off of the one or more acoustically reflective surfaces.

Abstract: The present invention relates to a seismic source array for deploying a seismic source array, comprising a housing and a plurality of seismic sources suspending from the housing, each source being configured for generating a pressure pulse signal, wherein the array further comprises a protective structure attached to the housing and defining a protective space near the housing, wherein the seismic sources in a first position relative to the housing suspend from the housing such as to be arranged in the protective space defined by the protective structure, and wherein at least one of the seismic sources suspends from the housing by means of a suspension structure configured for moving the at least one seismic source to a second position relative to the housing, the second position being located outside the protective space.

Abstract: A method of calibrating an ultrasound probe includes mounting an ultrasound probe onto a calibration system, transmitting an ultrasound test signal from an element of the probe through a test medium of the calibration system, and receiving the test signal on a matrix of hydrophones such that an element's position relative to other elements and other arrays within the same probe can be computed. Further, the system described herein is configured to detect the acoustic performance of elements of a probe and report the results to an end user or service provider.

Abstract: A PCBA for use in a high-energy broadband electric field includes a low-voltage power supply and alternating conductive and dielectric layers. An outermost one of the conductive layers includes a dielectric surface switch having closely-spaced switch contacts. The first switch contact is connected to the positive terminal and the second switch contact is connected to the negative terminal. Vias connect the conductive layers to the terminals through the respective first and second switch contacts to form power and ground planes. A metamaterial layer of nickel is doped with up to 20 percent phosphorus or chromium by weight, has a uniform thickness of less than 5 ?m, is sandwiched between interfacing surfaces of a pair of the conductive and dielectric layers, and evenly coats one of the interfacing surfaces. A sonobuoy system includes the PCBA, e.g., an Electronic Function Select board, a cylindrical housing, and an acoustic array.

Abstract: A method is described for seismic imaging that will produce a seismic image with correctly focused and positioned reflectors. This is accomplished by adding physical geological information to a beam tomography process to generate an updated earth model for the seismic imaging. The method may be executed by a computer system.

Abstract: A carrier wave generating unit for generating a carrier wave signal; a modulating unit for generating a modulated wave signal by performing amplitude modulation on the carrier wave signal generated by the carrier wave generating unit with an audio signal; an adding unit for adding the carrier wave signal generated by the carrier wave generating unit and the modulated wave signal generated by the modulating unit to generate a signal; an ultrasonic emitter for emitting the signal generated by the adding unit, and an ultrasonic emitter arranged on the central axis of the ultrasonic emitter and ahead of the emitting surface of the ultrasonic emitter, for emitting the carrier wave signal generated by the carrier wave generating unit in the same direction as the emitting direction of the ultrasonic emitter are included, wherein the phase of the carrier wave signal emitted by the ultrasonic emitter is opposite to that of the carrier wave signal included in the signal emitted by the ultrasonic emitter.

Abstract: An intracardiac imaging system has an MRI compatible intracardiac echography catheter having transmitters, receivers, a multiplexer, and a beamformer. The catheter can include an atraumatic tip disposed on the distal end of the catheter, a pair of inductively coupled coils proximal the atraumatic tip, at least one CMUT-on-CMOS volumetric imaging chip disposed between the pair of coils, and a cable lumen disposed within the volume sized to house a small number of electrical connections due to significant multiplexing in the CMUT-on-CMOS chip. The catheter can be made of MRI compatible materials and can include active cooling channels.

Abstract: There is provided, for example, an ultrasonic probe capable of improving the accuracy of testing of a curved-surface structure. An array sensor (ultrasonic array sensor) includes multiple elements (oscillators) to generate an ultrasonic wave. Water (propagation member) is disposed between the array sensor and steel (test target) to propagate the ultrasonic wave. At least one reflection section reflects the ultrasonic wave reflected and returned from the surface of or the inside of the steel, and causes the ultrasonic wave to fall on any of the elements.

Abstract: A transducer is provided, which includes an oscillator and a broadbanded matching circuit. In the oscillator, a peak frequency corresponding to a peak transmission sensitivity may separate from a center frequency in a given bandwidth, and a transmission sensitivity may increase as a frequency separates from the peak frequency with respect to the center frequency. The broadbanded matching circuit may be configured to perform an impedance matching so that the transmission sensitivity of the oscillator at the peak frequency becomes substantially equal to the transmission sensitivity of the oscillator at the center frequency.

Abstract: Various methods and systems are provided for maintaining polarization of an ultrasound probe and increasing image quality of an image generated during an imaging procedure. As one example, a method for an ultrasound imaging system may include executing one or more imaging sequences with an ultrasound transducer; and applying a repolarization sequence to the ultrasound transducer one or more of before, after, and interleaved between the one or more imaging sequences, where the repolarization sequence is separate from the one or more imaging sequences.

Abstract: A wading staff is provided herein that is configured to provide stability for an angler that is standing in a body of water. The wading staff includes a staff portion defining a first end and a second end, a handle disposed proximate the first end of the staff portion, and a sonar transducer disposed at least partially within the staff portion. The sonar transducer is configured to transmit a sonar beam into an underwater environment. The sonar transducer is positioned and oriented within the staff portion such that the sonar transducer is configured to transmit the sonar beam into a portion of the underwater environment when the staff is at least partially submerged. A display may be mounted to the wading staff or located remotely to display corresponding sonar images.

Abstract: Various implementations directed to alert zones for a marine environment. In one implementation, a marine electronics device may include a memory having a plurality of program instructions which, when executed by the sonar signal processor, cause the processor to determine one or more alert zones for a marine environment proximate to a vessel, and to receive sonar data from a transducer array disposed on the vessel, where the sonar data corresponds to the marine environment. The memory may further have program instructions which, when executed by the sonar signal processor, cause the processor to analyze the received sonar data to determine a depth line, where the depth line is a representation of one or more depths of an underwater floor of the marine environment, and to provide one or more alerts if at least a portion of the depth line is positioned within the one or more alert zones.