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7611462 |
Acoustic beam forming in phased arrays including large numbers of transducer elements
A focused ultrasound system includes a transducer array, a controller for providing drive signals to the transducer array, and a switch. The transducer array includes a plurality of “n”...
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7606114 |
Systems and methods implementing frequency-steered acoustic arrays for 2D and 3D imaging
Frequency-steered acoustic arrays transmitting and/or receiving multiple, angularly dispersed acoustic beams are used to generate 2D and 3D images. Input pulses to the arrays are generally...
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7602672 |
Quasi-self focusing high intensity and large power ultrasonic transducer
A quasi-self focusing high strength large power ultrasonic transducer including a backing and a plurality of piezo-electric crystal sheets is disclosed. The backing has a double layer structure...
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7593289 |
Reflectors and reflector light and sound source systems
A reflector employs materials and design features that can transfer both light and sound emission simultaneously, from sources to planes or volumes, in an efficient and controlled manner. Compound...
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7522475 |
Ultrasonic sensor and obstacle detection device
An ultrasonic sensor includes: a first vibrator for transmitting an ultrasonic wave; multiple second vibrators for outputting a reception signal of a reflection wave; a casing having a bottom for...
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7491169 |
Ultrasonic apparatus and method to assess compartment syndrome
A process and apparatus for measuring pressure buildup in a body compartment that encases muscular tissue. The method includes assessing the body compartment configuration and identifying the...
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7450472 |
Deployable audible protection
The invention relates to an acoustic protection system used to secure a determined zone of interest and to remotely control an individual or a group of individuals within this zone and with a...
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7406001 |
Underwater acoustic beacon and method of operating same for navigation
An underwater acoustic beacon comprises a cylindrical transducer and at least one spiral wavefront transducer aligned along a common central axis. For use in underwater navigation, the cylindrical...
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7382684 |
Method for selective bandlimited data acquisition in subsurface formations
The method for exploring desired characteristics of a subsurface sector, having at least one resonant frequency, is based on selectively transmitting suitable narrowband energy waves into the...
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7372775 |
Ultrasonic transmitter, ultrasonic transceiver and sounding apparatus
A driver circuit for generating a driving pulse signal to activate a vibrating element includes a half-bridge circuit formed essentially of first and second switching devices to which drive signals...
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7372776 |
Modal acoustic array transduction apparatus
A transduction apparatus, which employs an array of individual transducers that generates multiple acoustic radiation modes, is described. These modes are used together to yield directional steered...
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7369115 |
Haptic devices having multiple operational modes including at least one resonant mode
An apparatus comprises a signal source, a driver and an electro-mechanical transducer. The signal source is configured to output a haptic feedback signal. The driver is configured to receive the...
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7354400 |
Ultrasonographic method and ultrasonographic device
An ultrasonographic method includes: a first encoding transmission/reception step for transmitting an ultrasonic beam encoded by an encoding set consisting of a plurality of modulation codes in...
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7319641 |
Signal processing device for acoustic transducer array
The invention provides transducer arrays which are capable of outputting sound beams having a relatively constant width, and with minimal sidelobes, across a range of frequencies. This is achieved...
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7313242 |
Hypersonic transducer
This invention provides methods and apparatus for focusing a hypersonic beam to control both a direction and depth of audible formation delivery. Signals that are delivered to each of a plurality...
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7292502 |
Systems and methods for producing a sound pressure field
The invention provides, in various embodiments, a transducer for generating hyper-directional sound beams, and a system and method employing a hyper-directional sound transducer for producing...
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7257167 |
System and method for multi-access MIMO channels with feedback capacity constraint
Systems and methods of MIMO wireless communication system with partial feedback are disclosed. In one embodiment, a base station estimates the channel matrices of the K mobile units and transmits...
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7254092 |
Method and system for swimmer denial
A method and system for swimmer denial transmits underwater sound associated with a time-reversed impulsive response, resulting in amplified sound at a predetermined location. The amplified sound...
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7215599 |
Ultrasonic transmitter, ultrasonic transceiver and sonar apparatus
An ultrasonic transmitter generates a reference signal based on a clock signal of a specific frequency and a control signal made up of binary values 0 and 1 for controlling how the level (High or...
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7212467 |
Sonar localization
Described herein is sonar localization apparatus which comprises a plurality of acoustic transducers ( 6 ) arranged to define at least two end fire arrays ( 2, 4 ) each of which produces a sonar...
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7190637 |
Guided underwater object
A guided underwater object (GUO) ( 100 ) comprises steering means, an on-board guidance system ( 200 ) for controlling the steering means, and a hydrophone unit or units ( 104 A, 104 B, 104 C, ...
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7167415 |
Transducers for focusing sonic energy in transmitting and receiving device
Ultrasonic transducers which include at least one internally directed generally concavely configured sonic energy radiating element which directs sonic energy toward at least one arcuate energy...
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7146011 |
Steering of directional sound beams
Apparatus is disclosed for steering a directional audio beam that is self-demodulated from an ultrasound carrier. The apparatus includes means for modulating a carrier signal with an audio signal...
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7084768 |
Anti-collision interrogation pulse focusing system for use with multiple surface acoustic wave identification tags and method of operation thereof
The present invention provides a system for avoiding code collisions from multiple SAW identification tags and a method of operating such system. In one embodiment the invention provides for (1)...
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7079450 |
System and method for eliminating audible noise for ultrasonic transducers
Methods for reducing clicking of ultrasonic air-coupled transducers in which a mechanical filter that attenuates audible frequencies relative to ultrasonic frequencies is placed in the path of the...
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7016399 |
Receiving apparatus including adaptive beamformers
Receiving apparatus, for receiving a transmission signal in a cellular mobile communications system, comprises a main beamformer ( 6 M , 14 M ) which processes received signals, representing the...
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6978028 |
Process and device for focusing acoustic waves
After emission of an acoustic pulse, having a first duration, from a given location, acoustic signals coming from the location are gathered through a multi-scattering medium on an array of...
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6842401 |
Sonar beamforming system
The present invention relates to sonar beamforming systems and methods, using a forward-looking sonar having transmit and receive transducer arrays with a beamforming device and at least one...
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6795374 |
Bias control of electrostatic transducers
A method and system for controlling bias voltage for use with an electrostatic transducer are provided. The bias voltage is dynamically varied or set as a function of imaging mode, depth gain...
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6768702 |
Baffled ring directional transducers and arrays
The present invention relates to a directional electro-acoustic transducer and arrays of transducers of the cylindrical or ring electro-mechanical type in conjunction with a partial conformal...
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6731569 |
Methods for reducing ringing of ultrasonic transducers
Methods for reducing ringing of dual-function ultrasonic air-coupled transducers in which at least one electrical passive circuit is applied to the transducer. The circuit may be either a linear...
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6721235 |
Steerable beamforming system
The present invention relates to a multiple beamforming processor formed with an integrated circuit in which a plurality of beams can be formed simultaneously.
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6671227 |
Multidimensional beamforming device
A multidimensional beamforming device that performs consecutive one-dimensional operations. For example, beamsteering for a two-dimensional array can be include a projection of a beam onto each of...
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6634234 |
Adjustable measurement head and a level measurement device and method employing it
A measurement head for a device for measuring the level of a product in a container comprises a transmitter/receiver unit to transmit a scanning signal and receive an echo of the scanning signal...
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6552964 |
Steerable beamforming system
The need for multiple, cost-effective deployment of an underwater camera has resulted in the development of a low-power high-resolution imaging system using a sparse array. The system can be used...
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6527723 |
Variable multi-dimensional apodization control for ultrasonic transducers
Variable multi-dimensional apodization control for an ultrasonic transducer array is disclosed. The variable multi-dimensional apodization control is applicable to both piezoelectric based...
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6514205 |
Medical digital ultrasonic imaging apparatus capable of storing and reusing radio-frequency (RF) ultrasound pulse echoes
A storing method of a RF ultrasound pulse echo and a medical digital ultrasonic imaging apparatus capable of re-using the stored RF ultrasound pulse echo store and focus each RF ultrasound pulse...
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6424597 |
Multielements ultrasonic contact transducer
This transducer comprises means ( 16 to 24, 56 to 60 ) for determining the respective positions of ultrasound emitting elements ( 6 ) with respect to an object to be inspected ( 8 ) during...
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6407964 |
Device for examining sheet-like articles using ultrasound
The invention relates to an apparatus for testing sheet material, in particular bank notes, comprising a device for transporting the sheet material in a defined direction, at least one transducer...
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6363033 |
Method and apparatus for transmit beamformer system
A digital transmit beamformer system with multiple beam transmit capability has a plurality of multi-channel transmitters, each channel with a source of sampled, complex-valued initial waveform...
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6339412 |
Device and method for stabilizing horizontal transistor of video display device
A stabilizing circuit for stabilizing a horizontal transistor of a video display device. The stabilizing circuit includes a transient state detector for detecting a transient state of a phase...
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6292435 |
Circuit and method for exciting a micro-machined transducer to have low second order harmonic transmit energy
A circuit and method for predistorting an input pulse to a micro-machined ultrasonic transducer (MUT) compensates for non-linearities in the transducer, thus allowing the transducer to provide a...
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6292434 |
Method for forming a spherical wave by superposition of a plurality of limited plane waves
A spherical wave formation method by superposition of a plurality of limited plane waves is provided, in which a plurality of sufficiently small elements in a linear transducer transmits a...
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6292433 |
Multi-dimensional beamforming device
A multi-dimensional beamforming device that performs consecutive one-dimensional operations. For example, beamsteering for a two-dimensional array can be include a projection of a beam onto each of...
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6285628 |
Swept transit beam bathymetric sonar
The invention pertains a bathymetric sonar system involving a single swept transmit beam projector system which compensates for ship attitude and positioning changes. A sonar transducer array has a...
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6278656 |
Manipulation of acoustic waves using a functionally graded material and process for making the same
A device for manipulation of acoustic waves is provided, comprising a functionally-graded material for interposing between a source of the acoustic waves and a target, which may be a detector of...
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6243323 |
System and method for eliminating audible noise for ultrasonic transducer
An ultrasonic ranging system and method for detecting the presence of and distance to a target using ultrasonic sound waves generated by an ultrasonic transducer with reduced audible noise....
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6226228 |
Ultrasonic harmonic imaging system and method
A method for imaging a target includes the steps of transmitting ultrasonic energy at a fundamental frequency and receiving reflected ultrasonic energy at a harmonic of the fundamental frequency....
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6138513 |
Method and apparatus for fast acquisition of ultrasound images
New apodization functions providing an effective rejection of side lobe amplitude level within wide range of beam steering angles are described in this invention. A central amplitude apodization...
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6128958 |
Phased array system architecture
Architecture for driving a ultrasound phased array. The architecture includes a series of amplifiers which produce discrete driving signals. The amplifiers number less than the number of transducer...
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