Abstract: An apparatus comprising an array of polymer-based capacitive micromachined ultrasonic transducers positioned on a substrate. The substrate may be at least substantially transparent to ionizing radiation, be flexible, and/or have walls positioned thereon to protect the transducers.

Abstract: Systems and methods described herein relate to training a depth estimator to be scale-aware using weak sonar supervision. In one embodiment, a depth and scale training system trains a self-supervised monocular depth estimation (MDE) network by minimizing a photometric reprojection error between an original target image of a scene and a viewpoint-synthesized image. The depth and scale training system also supervises weakly the training of the MDE network by minimizing a loss computed between a depth image generated by the MDE network and a set of sparse sonar data points collected from the scene to teach the MDE network to estimate metric scale in connection with controlling a robot.

Abstract: In some examples, the disclosure provides a method for deploying a plurality N of seismic sensors, wherein each seismic sensor is adapted to measure seismic energy with at least one gain, within a survey area, the method comprising: obtaining a plurality M of gains from which the at least one gain may be selected; configuring the plurality N of seismic sensors such that, for each given gain of the obtained plurality M of gains, at least N/M seismic sensors are adapted to measure the seismic energy with at least one corresponding gain; and deploying the plurality N of configured seismic sensors on the survey area.

Abstract: Encoded transmit signals are provided to an ultrasound array such diverging ultrasound waves are sequentially transmitted. Each diverging ultrasound wave is generated by a respective set of encoded transmit signals, where each set of encoded transmit signals is encoded by a respective row of an N×N invertible orthogonal matrix. Only a selected subset of M rows, with N<M, is employed to encode the transmit signals. Sets of receive signals detected in response to the transmitted diverging ultrasound waves are decoded via a transposed matrix generated based on the invertible orthogonal matrix, with each set of decoded receive signals being associated with insonification via a subset of the ultrasound array elements in the fixed aperture. Synthetic aperture beamforming is performed on the decoded receive signals to generate an ultrasound image.

Abstract: Disclosed is an acoustic matching member comprising matching pattern to determine an impedance of the acoustic matching member and a phase change of the acoustic matching member defined as the product of a wave number and thickness of the acoustic matching member, which satisfies the impedance and the phase change matching conditions so that 90% or more of an ultrasound may be transmitted through a barrier located between an incident medium and a target medium.

Abstract: An apparatus according to the embodiment includes a first delay circuit, a second delay circuit, and processing circuitry. The first delay circuit delays an ultrasound signal in a first channel using a plurality of capacitors. The second delay circuit delays an ultrasound signal in a second channel using a plurality of capacitors. The processing circuitry make a first write start position in which writing the ultrasound signal in the capacitor in the first delay circuit is started and a second write start position in which writing the ultrasound signal in the capacitor in the second delay circuit is started different from each other.

Abstract: An obstacle monitoring system includes a transducer that receives an ultrasonic echo from an obstacle and generates a signal based on the echo. The system further includes a controller coupled to the transducer that is calibrated based on a frequency response of the transducer and a coupling circuit. The system further includes circuitry generating a damping current, controlled by the controller, that reduces or eliminates reverberation of the transducer.

Abstract: For transducer connection to an integrated circuit, a silicon or other wafer-based chip is processed to provide signal routing, such as altering the pitch using wafer process deposited conductors. This chip or silicon interposer may be more simply re-designed to relate the pitch of an array to the integrated circuit I/Os, avoiding redesign of the integrated circuit.

Abstract: A method and a device perform data communication between a superordinate computer system of an ultrasonic measurement system and an associated ultrasonic sensor via a modified UART data interface. The method and device exit the UART protocol and use a special signaling protocol and a modification of the UART data interface for the duration of an ultrasonic measurement phase to transmit the arrival of echoes at the ultrasonic sensor promptly to the superordinate computer system and return to the UART protocol for the data transmission from the ultrasonic sensor to the superordinate computer system after the end of the ultrasonic measurement phase.

Abstract: A method, including receiving a first set of ultrasonic responses to first ultrasonic signals transmitted using one or more transducers; generating a confidence value based on a detection of a target value using the first set of ultrasonic responses; receiving a second set of ultrasonic responses to second ultrasonic signals transmitted using the one or more transducers; and updating the confidence value using the second set of ultrasonic responses.

Abstract: An electronic device, according to various embodiments, includes: an application processor including an audio processing module and a voice recognition module; a mic; a speaker; and a sensor hub. While the audio processing module included in the application processor is in a sleep state, the sensor hub generates an ultrasonic signal and provides the ultrasonic signal to the speaker so that the speaker outputs a first signal including the ultrasonic signal therethrough; receives, from the voice recognition module, a second signal inputted through the mic; and determines whether an object is near the electronic device, at least on the basis of the first signal and the second signal.

Abstract: Disclosed is a method comprising: receiving captured seismic data and generating first velocity and first pressure data therefrom; transforming, from a first data domain to a second data domain, the first velocity and first pressure data and thereby generate second velocity and second pressure data; mapping wavenumber gather data from the second data domain to a third data domain; determining envelope ratio scaling data and threshold value data using the second velocity and second pressure data; generating, threshold envelope data using a thresholding operator associated with the threshold value data; using coefficient data associated with the threshold envelope data to estimate vertical component data; transforming, from the third data domain to the first data domain, the vertical component data to generate temporal-spatial data; and generating, based on the temporal-spatial data, noise component data comprised in the captured seismic data.

Abstract: One or more systems, devices, computer-implemented methods and/or computer program products of use provided herein relate to ultrasound coexistence in an FMS. A system can comprise a memory that can store computer-executable components. The system can further comprise a processor that can execute the computer-executable components stored in the memory, wherein the computer-executable components can comprise a frequency generation component that can use a variable frequency generator circuitry to generate electronic signals at one or more different frequencies in at least one fetal sensor device (FSD) of a fetal monitoring system (FMS), wherein the electronic signals can cause a transducer of the at least one FSD to generate ultrasound signals at the one or more different frequencies.

Abstract: A passive compression wave imaging system for locating cavitation bubbles, the system comprising a plurality of sensor elements (202b) arranged in an array and each arranged to produce an output signal, and processing means (204a, 204b) arranged to: define a sample period, and a sample space over which the signal can be sampled at each of a plurality of sample points in the sample space; define a grid of candidate bubble positions; define a random projection identifying a respective different group of the sample points for each of the output signals; sample each of the output signals at the group of sample points defined by the random projection to generate sample data; define a dictionary which defines the sample values that would be obtained for the signal of each of the respective group of sensor elements at each of the sample points for the sample period for a bubble at each of the candidate bubble positions; define a vector the elements of which identify the candidate bubble positions; and perform a mini

Abstract: An optomechanical ultrasound detector includes: a micromirror substrate; a mechanical resonator that receives ultrasound waves, oscillates at resonator frequency fr, changes cavity length Lc, and produces intra-cavity light; and an optical microcavity between the micromirror substrate and the mechanical resonator with cavity length Lc and cavity resonance frequency fc formed by the mechanical resonator and the micromirror substrate, such that the micromirror substrate produces cavity output light from the intra-cavity light, wherein the cavity output light optically encodes information about the ultrasound waves received by the mechanical resonator.

Abstract: Certain aspects of the present disclosure provide a method for providing stacked multi-component seismic while drilling (SWD) seismic waveforms. The method includes obtaining multi-component SWD seismic pressure and shear waveforms associated with a planned well. The method includes pre-processing, at the at least one processor, the multi-component seismic SWD waveforms to generate an ordered subset of filtered SWD seismic waveforms and determining, based on a maximum eigenvalue associated with first and maximum correlation matrices of the pressure and shear waveform components, a number of the subset of filtered SWD seismic waveforms to stack. The method includes estimating a first arrival time (FAT) and sending the stacked number of filtered SWD seismic waveforms to a surface equipment, centered around the estimated FAT.

Abstract: A split aperture beamforming, reflection detection, beam segmentation, and point selection scheme for obtaining high resolution sonar images is disclosed. A sonar imaging device beamforms at a coarse horizontal and vertical resolution to create smaller signal data cuboids. Each beam is partitioned into segments based on direction of arrivals obtained through split aperture beamforming. Detected points in the cuboids are allocated to a beam segment and associated direction of arrival.

Abstract: A method of determining a rate of penetration of a drill bit using acoustic technology. The method comprises providing a drill string including a drill bit configured to drill through a subterranean formation in a wellbore and operably coupling an array of acoustic transducers to a member of the drill string. Acoustic waves are emitted toward a wall of the wellbore with at least one acoustic transducer and a frequency of the acoustic waves reflected from the wall of the wellbore are measured with at least one acoustic transducer. The array of acoustic transducers is operably coupled to a controller comprising a memory and a processor to determine a frequency shift between the emitted acoustic waves and the reflected acoustic waves. A rate of penetration of the drill bit is determined with the processor based at least in part on the frequency shift. Downhole acoustic systems for determining a rate of penetration of a drill string are also disclosed.

Abstract: The invention relates to an ultrasonic microscope for inspecting an object, comprising an object holder for holding the object in an object region; a scan head; a first transducer supported by the scan head and configured to emit first acoustic pulses along an emission direction, to focus the first acoustic pulses in a focal point, to detect second acoustic pulses emerging from the object and to output a first detection signal representing the second acoustic pulses detected by the first transducer; a first actuator configured to move the first transducer relative to the scan head along a vertical direction which is essentially parallel to the emission direction; and a controller configured to control the first actuator based on the first detection signal. Further, the invention relates to a carrier for carrying an acoustic pulse transducer of an ultrasonic microscope within an immersion liquid.

Abstract: An object detection device includes a transceiver configured to transmit/receive an ultrasonic wave; a drive signal generation unit configured to generate a drive signal for driving the transceiver; a transmitter circuit configured to cause the transceiver to transmit a probe wave, which is an ultrasonic wave, by driving the transceiver based on the drive signal; and a receiver circuit configured to generate a reception signal corresponding to a reception result of the ultrasonic wave of the transceiver, wherein the drive signal generation unit is configured to generate the drive signal so that frequency of the probe wave changes over time. The device further includes: a voltage measurement unit configured to measure a voltage signal generated in the transceiver while the transceiver transmits the probe wave with frequency changing over time; and a state determination unit configured to make a state determination regarding the transceiver based on the voltage signal.