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8169853 |
Acoustic system quality assurance and testing
Embodiments of the invention provide systems and methods for testing acoustic systems. According to one embodiment, a method for testing an acoustic system can comprise receiving a signal from the...
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8164976 |
Acoustic system quality assurance and testing
Embodiments of the invention provide for testing acoustic systems. According to one embodiment, testing an acoustic system can comprise receiving a signal from the acoustic system at a testing...
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8159900 |
Acoustic system quality assurance and testing
Embodiments of the invention provide systems and methods for testing acoustic systems. According to one embodiment, a method for testing an acoustic system can comprise receiving a signal from the...
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8154956 |
Marine acoustic source operation
Data is collected from the integral timing sensor of a marine acoustic source such as an airgun, typically used for seismic measurements. Artefacts in the firing data are used to monitor the firing...
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8139439 |
Methods and systems for seismic sensor calibration
Methods and systems for calibrating seismic sensors configured or designed for use in seismic signal detection. According to certain embodiments of the present disclosure, a current is injected...
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8130590 |
Wirelessly activating a unit of a subterranean survey system for testing
To test at least one unit of a subterranean survey system, the unit detects presence of wireless signaling of a mobile device. After the detecting, a wireless connection is established between the...
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8111581 |
Monitoring system for a ship'S radiated noise
A ship's radiated noise monitoring system includes a plurality of arrays of spaced vibration-responsive detectors, the arrays being adapted for location adjacent to the ship's hull in the region of...
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8090112 |
Self-diagnostic system for monitoring electrical equipment
This invention relates to a self-diagnostic audio system including a digital signal processor (DSP) that monitors a plurality of electronic components in an audio system, such as an amplifier,...
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8077541 |
Testing a sensor to produce a filter for noise attenuation
To test a seismic sensor, an output of the seismic sensor in response to a test signal applied by a signal generator is measured. According to a first function that corresponds to a reference...
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8064285 |
Method for functionally testing an ultrasonic sensor
A method for functionally testing an ultrasonic sensor on a motor vehicle in which, in a test operating mode, an ultrasonic signal is emitted whose magnitude is large enough that under conventional...
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8036063 |
System and method for automatic sensitivity adjustment of an acoustic detector
A method and system for automatically adjusting a sensitivity of an acoustic detector. The method comprises receiving an acoustic signal from a remote device, detecting the unique pattern embedded...
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8027225 |
Methods and systems for seismic sensors
Methods and systems for determining coil eccentricity of seismic sensors configured or designed for use in seismic signal detection. A direct electrical current is applied to a moving coil of a...
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8009508 |
Ultrasonic generator system
The system generates resonant ultrasonic vibrations, preferably in a torsional mode. A control circuit monitors, feedback signals therefrom, which are scanned to determine the frequency at which...
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7952959 |
Phantom for standardizing ultrasonograph and method of obtaining standardized ultrasonographic image using the phantom
Provided are a phantom for standardizing ultrasonograph and a method of obtaining an ultrasonographic image using the phantom, and more particularly, a phantom for measuring fat content in a target...
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7929379 |
Methods and systems for seismic sensors
Methods and systems for determining coil eccentricity of seismic sensors configured or designed for use in seismic signal detection. A direct electrical current is applied to a moving coil of a...
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7920709 |
Vector sound-intensity probes operating in a half-space
Method and apparatus (333) for measuring the sound-intensity vector in a half space bounded by a surface such as a wall or the ground (100) using an acoustic vector probe (AVP) (40), where the AVP...
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7843764 |
Ultrasonic imaging apparatus
A plurality of signal transmitters are respectively configured to produce a pulse current by repeatedly switching the connection state of a switching element. A plurality of ultrasonic transducers...
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7764570 |
Feedback protection of pressure measurement devices
Systems and methods for feedback protection of pressure measurement devices are disclosed. In one embodiment, a transmitter inside a pressure measurement device transmits a transmission signal...
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7738316 |
Method and apparatus for hydrophone array fault detection and exclusion
A system is disclosed that provides an improvement in detecting a faulty hydrophone channel in a hydrophone array. The disclosed technique operates on pairs of hydrophones or, to generalize, on...
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7646669 |
Method for measuring flow noise of water over a hydrophone
A method for measuring water-flow noise over a hydrophone comprising: coupling the hydrophone to a distal end of a hydrodynamic-drag-reduced beam, which has a proximal end that is rotatably...
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7606113 |
Modeling sound propagation for underwater test areas
A system and method for quickly modeling the ideal acoustic sound propagation in a body of water based on current SVP data and the position of the sound source, comprising the steps of: obtaining...
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7535793 |
Acousto-mechanical vehicle characterization system and method
A system and method for detecting concealed cargo, such as explosives contained in a closed vehicle trunk, by characterizing the transfer function between sets of wheels of the vehicle and...
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7535794 |
Transducer surface mapping
Method for adjusting the output of a phased array ultrasonic transducer using surface mapping. The transducer surface is mapped using a sensor, such as a hydrophone, to determine the actual...
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7453762 |
Apparatus and method of auto frequency calibration for transducer
An apparatus for automatically calibrating a transducer are disclosed in the present invention, the apparatus comprising: an oscillator, for generating a system frequency; a micro controller, being...
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7450474 |
Diagnostic system and method for transducers
In accordance with the illustrative embodiment, a diagnostic method for use with multi-element transducers includes determining an acoustic center of a transducer and determining an offset of the...
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7447112 |
Test method for a method for passively obtaining target parameters
A test method for a method used for passively obtaining target data regarding a moving target, wherein bearing angles are measured as real target data from the bearing of the target using an...
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7417919 |
Determination of sensor distance
Apparatus is described for accurately determining the elevation, E, of a pulse-echo ultrasonic range sensor (2) relative to a datum level (14). The figure shows vertical elevations of the apparatus...
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7394723 |
Atmospheric turbulence hazard detector
An Atmospheric Turbulence Detector utilizes a sensor to detect noise and extracts infrasound having frequencies below a specified infrasound frequency. A threshold is computed from the detection of...
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7388807 |
Method for an antenna angular calibration by relative distance measuring
The present invention relates to the angular calibration of passive reception systems such as sonars or active ones such as certain radars whose angular performance is inadequate. The invention...
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7388806 |
Mass positioning apparatus for a seismic sensor
A mass positioning apparatus for use with seismic sensors is described. The seismic sensor includes axis mechanics including a pivotable boom with a defined null point. The mass positioning...
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7385873 |
Mass positioning adjustment mechanism for a seismic sensor
A mass position adjustment apparatus for use in a seismic sensor having axis mechanics including a pivotable boom with a defined null point is described. The apparatus comprising: (a) adjustment...
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7373805 |
Apparatus for directing particles in a fluid
There is disclosed apparatus for directing particles entrained in a fluid, comprising a chamber having a first wall, including means for generating a sound wave having a frequency v, and a second,...
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7375646 |
Seismic detection and response system
A seismic switch is a programmable device capable of distinguishing between seismic movements due to an earthquake or an explosion, which is used to send a signal to control panels for security...
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7369458 |
Transducer identification
A transducer identification system provides transducer characteristic information to an echosounder. The echosounder, in turn, utilizes the transducer characteristic information to alter its...
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7353708 |
Ultrasonic generator system
The system controls the frequency of an ultrasonic signal to be applied to a waveguide, such that the frequency corresponds to a preferred resonance mode of the waveguide and not to adjacent...
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7330395 |
Method and system for automatically calibrating sound level meter
A method and a system for automatically calibrating a sound level meter which achieves accurate and secure calibration of a sound level meter using a sound calibrator. The sound calibrator...
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7330396 |
Farfield analysis of noise sources
An algorithm diagnoses the noise source strength distribution on an arbitrarily shaped object based on acoustic pressures measured in the far field, known as FANS. FANS enable one to acquire a...
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7266040 |
Active sonar simulation
An exemplary embodiment of the invention relates to a method and system for displaying simulated acoustically realistic active sonar signals. The method includes simulating a realistic sounding...
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7225662 |
Geophone calibration technique
Various techniques are described which may be used to facilitate and improve seismic exploration activities. For example, one aspect of the present invention is directed to a technique for enabling...
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7224640 |
Underwater acoustic bearing sensor
In an underwater acoustic bearing sensor, the vector sensor, heading sensor, and pitch and roll sensor are held in a common mounting ring to ensure that their coordinate systems are collinear. The...
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7213442 |
Methods of arranging transducers and transducer arrays having reduced phase ambiguity for determining direction of arrival of received signals
Method of arranging transducers, including non-coplanar interferometer antennas on the outer surface of an aircraft, to minimize phase ambiguities when determining the direction of arrival of a...
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7190633 |
Self-calibrating shooter estimation
Shockwave-only solutions that estimate shooter position and shot trajectory are extremely sensitive to the quality and precision of the shock time-of-arrival (TOA) measurements as well as the...
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7187619 |
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...
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7154811 |
Simulator for developing acoustic detector of underwater vehicle
A simulator for developing an acoustic detector of underwater vehicle precisely verifies performance of an acoustic detector by simulating an actual underwater environment, including target signal,...
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7085194 |
Methods and systems for calibrating acoustic receivers
A method and system for calibrating acoustic receivers (112). The method and system facilitate calibrating the acoustic receivers (112) while they are mounted to a downhole acoustic tool (102)....
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7085196 |
Method and apparatus for gathering seismic data
In the present invention, a seismic receiver contains an onboard digitizer that samples and converts a signal from detected seismic energy into the digital domain. The receiver contains an analog...
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H002146 |
Method for determining long term stability
A method of determining long term power variation, as an indication of long term stability of power output, by steps of measuring power output at successive intervals of time, determining...
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7007539 |
Apparatus and methods for interfacing acoustic testing apparatus with acoustic probes and systems
Methods and apparatus are provided for testing an acoustic device that has multiple transducing elements adapted for conversion between acoustic and electrical signals. An electrical transmission...
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7002877 |
Method and apparatus for active sonar performance prediction
A system and method for predicting active, low-frequency sonar array performance in shallow, littoral waters using a physics-based modeling of acoustic reverberation. An operator characterizes the...
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6990419 |
System for identifying a signal source
A system for identifying a signal source in a predetermined space, the system including multiple sensing units arranged at different locations to detect signals in the predetermined space. The...
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