Matches 1 - 50 out of 139 1 2 3 >
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7535801 Multiple frequency sonar transducer  
A sonar transducer has a head mass at a distal end thereof, a tail mass at a proximal end thereof, a driver in physical contact with the head mass and the tail mass, and a flextensional body...
7530952 Capacitive ultrasonic transducers with isolation posts  
A capacitive ultrasonic transducer is described which include one or more cells including a cavity defined by a membrane electrode supported spaced from a support electrode by insulating walls with...
7457199 Shear mode folded shell projector  
An acoustic projector with a thin walled shell extending between flanges having helicoidal corrugations extending between the flanges. A shear mode motor is coupled to the thin walled shell to...
7453772 Flexural cylinder projector  
An inverse flextensional projector exhibits a low frequency flexural mode and a higher frequency “breathing” mode to defeat stealthy targets and to conduct short and long range detection and...
7345953 Flextensional vibration sensor  
A vibration sensing device, package and system and a method of manufacturing a vibration sensing device are disclosed. The vibration sensing device comprises a body whose geometry is such that it...
7292503 Multi piston electro-mechanical transduction apparatus  
An electro-mechanical transducer, which provides radial amplified multiple piston motion is formed from attached multiple lever arms and multiple electro-mechanical drivers. The piston motion is...
7205704 Valve control device  
The invention relates to a device for displacing a moving part along a longitudinal axis relative to a housing, said device being symmetrical about a plane extending longitudinally relative to the...
7038355 Tunable microresonator on an insulating beam deformable by the difference in thermal expansion coefficients  
A device comprising a resonator formed of a piezoelectric layer sandwiched between two metal electrodes, the resonator being laid on a suspended beam, the device comprising means for deforming said...
7030536 Micromachined ultrasonic transducer cells having compliant support structure  
A micromachined ultrasonic transducer array comprising a multiplicity of cMUT cells built on a substrate. Each cMUT cell comprises a compliant support structure built on the substrate, a membrane...
7019439 High power ultrasonic transducer with broadband frequency characteristics at all overtones and harmonics  
A transducer assembly for receiving a stimulating signal and producing ultrasound therefrom at one or more frequencies, over an ultrabroad bandwidth at each frequency, includes a front mass...
6987445 Water resistant audible signal  
The invention is an modified audible signal, such as a piezoelectric noise-making and audible signaling device, which further includes a hydrophobic covering material, such as...
6865140 Mosaic arrays using micromachined ultrasound transducers  
An ultrasound transducer array includes a multiplicity of subelements interconnected by a multiplicity of microelectronic switches, each subelement comprising a respective multiplicity of...
6829198 Electroacoustic transducer having compression screw mechanical bias  
An electro acoustic transducer has a housing having an axial threaded bore. A transducer driver element is axially aligned in the bore and has a first end mounted on an electrically conductive...
6784600 Ultrasonic membrane transducer for an ultrasonic diagnostic probe  
The invention is directed towards structures for use with micro-formed membrane ultrasonic transducers, and methods for fabricating the structures. In one embodiment, the transducer includes a...
6714484 Microfabricated acoustic transducer with suppressed substrate modes  
A microfabricated acoustic transducer with suppressed substrate modes includes a diaphragm containing an upper electrode suspended above a substrate containing a lower electrode; the substrate may...
6678213 Slotted cylinder transducer with trapezoidal cross-sectional electrodes  
A slotted cylinder transducer assembly, which has an outer cylindrical shell having a gap. A cylindrical actuator is disposed adjacent and inside the shell and has a gap which corresponds in...
6643222 Wave flextensional shell configuration  
A flextensional transducer projector shell design is disclosed. The shell design has a shape formed so as to reduce the stress placed on the transduction driver as compared to other shell designs....
6535459 Barrel stave projector-stave attachment  
An underwater acoustic projector comprising a pair of spaced apart end caps with an acoustic driver positioned between the end caps, the driver having smaller cross-sectional dimensions than the...
6504795 Arrangement of micromechanical ultrasound transducers  
The damping of membranes of ultrasound transducers in an arrangement occurs at the front side directly on the membranes by applying a polymer layer, whereby the working temperature dependent on the...
6383152 Apparatus for producing shock waves for technical, preferably medical applications  
An apparatus produces intense pressure waves as shock waves for technical and preferably medical applications, especially for lithotripsy and/or pain therapy. Acoustic waves of high energy density...
6356511 Low distortion ratio hydrophone  
Very low distortion hydrophone comprising at least one pair of sensitive elements ( 6 and 8 ) of piezoelectric type (for example and not limitatively), associated with at least one of the...
6304516 Transducer shell assembly for a bimodal transducer  
A transducer shell assembly and bimodal transducer are provided. The transducer shell assembly has a hollow split tube such that a gap extends along its length to define first and second opposing...
6298012 Doubly resonant push-pull flextensional  
The present invention relates to a flextensional transducer device comprising a multi-resonant shell and push-pull driving system for driving the shell so as to provide at least two tunable...
6188313 Device for generating sound  
A device for regenerating powerful acoustic pressure comprises at least an arrangement for generating sound while utilizing the flextensional technique, i.e. having at least one surface element...
6160762 Optical sensor  
An element that is sensitive to a pressure or acceleration signal comprises an optical element capable of changing its index of refraction and/or path length in response to a time varying pressure...
6049511 High sensitivity fiber optic hydrophone  
A fiber optic hydrophone structure comprises a casing around which is wound an optical fiber. The casing includes complementary top and bottom diaphragm members that mesh together and which are...
6002649 Tapered cylinder electro-acoustic transducer with reversed tapered driver  
A slotted cylinder transducer is provided having a cylindrical metal or cosite material shell. A cylindrical piezoelectric driver is bonded to the inside of the shell with an opening corresponding...
5956292 Monolithic micromachined piezoelectric acoustic transducer and transducer array and method of making same  
A monolithic micromechanical piezoelectric acoustic transducer with integrated control circuit includes a support member; a piezoelectric medium disposed on the support member; first and second...
5894452 Microfabricated ultrasonic immersion transducer  
An ultrasonic capacitance transducer having a sealed membrane supported above a conductive substrate by thin insulating material to form a sealed evacuated cavity whereby the transducer can operate...
5875154 Barrel stave flextensional projector  
An apparatus for producing an acoustic output in an underwater environment ncludes a radiator having a generally elongate, circular x-section with first and second ends, the outer surface of the...
5870351 Broadband microfabriated ultrasonic transducer and method of fabrication  
A broadband microfabricated ultrasonic transducer which includes a plurality of resonant membranes of different sizes and/or shapes supported above a conductive substrate.
5856956 Piezoelectric acoustic transducer  
The piezoelectric-acoustic transducer of the present invention has a hollow case provided with a sound hole. A piezoelectric actuator is disposed inside this case that has one end fixed to the case...
5835453 Electrostrictive acoustic projector and polymers used therein  
Polymer materials having a low Young's modulus, a low dielectric constant, and a high apparent piezoelectric response when subjected to a high direct bias voltage and a superimposed alternating...
5805529 Folded shell projector (FSP)  
An underwater acoustic projector comprising a pair of spaced apart end plates with an acoustic driver positioned between the end plates, the driver having smaller cross-sectional dimensions than...
5757728 Acoustic transmitter  
Acoustic transmitter in particular for use in offshore seismic explorations, having sound-emitting surfaces (1, 2) being adapted to be subjected to vibrational movement by means of a drive unit...
5757726 Flextensional acoustic source for offshore seismic exploration  
Flextensional acoustic source with sound-emitting surfaces (1, 2, 3, 4) adapted to be excited into vibrational movement, and for use in seismic exploration at sea. The source comprises a drive unit...
5742561 Transversely driven piston transducer  
A piston transducer having a central longitudinal axis and at least one piston member and an active transducer section displaced from one another along the longitudinal axis. Movement of the active...
5726952 Sound or ultrasound sensor  
A sound or ultrasound sensor is provided for transmitting and/or receiving sound or ultrasound, which is mechanically robust and chemically resistant and which has an adjustable emission...
5706254 Surface element and a device for generating sound  
A surface element for a device for generating sounds by influencing opposite extremities of a surface element to oscillate from and towards each other and thereby the surface element to oscillate...
5701277 Electro-acoustic transducers  
A flextensional transducer for use in surface ship applications requiring the capability of withstanding underwater explosive shock is described. The transducer includes a plurality of ceramic...
5673236 Underwater acoustic projector  
The underwater sound projector disclosed herein employs, as radiating surfaces or pistons, stiff, lightweight panels whose mass is substantially less than the inertial component of the radiation...
5566132 Acoustic transducer  
An acoustic transducer comprising a housing, and first and second stacks of ransduction plates disposed within the housing for engaging opposed wall portions of the housing, the first and second...
5546361 Directional electro-acoustic transducers comprising a sealed sell consisting of two portions  
The invention relates to directional electro-acoustic transducers compris a sealed shell consisting of two portions. A transducer according to the invention comprises one or more electro-acoustic...
5541894 Low distortion hydrophone  
A system and method provide a low distortion hydrophone. A first known piezoelectric element is mounted so as to receive a pressure signal. A second piezoelectric element is provided with a means...
5515343 Electro-acoustic transducers comprising a flexible and sealed transmitting shell  
The invention relates to electro-acoustic transducers comprising a flexible nd sealed transmitting shell referred to as flextensional transducers. A transducer according to the invention comprises...
5508976 Low frequency underwater acoustic transducer  
An underwater acoustic transducer for providing high amplitude low frequency acoustic output wherein a plurality of flextensional transducer ovals are formed into a mechanical transformer ring with...
5479377 Membrane-supported electronics for a hydrophone  
A transducer device and method include affixing a preamplifier or other suitable circuit to a thin piezoelectric membrane. The membrane fully supports the circuit at an inactive region of the...
5452267 Midrange ultrasonic transducer  
An acoustic transducer has an electrically energized crystal in contact with a flexible plate. The crystal drives the plate in a flexural mode. Particularly, the plate is oscillated so that...
5438553 Transducer  
A transducer having an energy conversion medium for converting changes in applied mechanical energy into corresponding changes in thermal energy and a pyroelectric material in thermal energy...
5434830 Ultrasonic transducer  
Ultrasonic piezoelectric transducer comprising a piezoelectric material having a profile whereby the transducer transmits and/or receives ultrasonic vibrations in a dilational (quasilongitudinal)...
Matches 1 - 50 out of 139 1 2 3 >