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7239577 Apparatus and methods for multicomponent marine geophysical data gathering  
In one embodiment the invention comprises a particle velocity sensor that includes a housing with a geophone mounted in the housing. A fluid that substantially surrounds the geophone is included...
7194390 Predictor of minimal noise figure for wideband amplifier  
A predictor allows the computation of the greatest lower bound of the noise figure pertaining uniformly over the operating band of a wideband amplifier. This computation is done directly from...
7149151 Ultrasound transducer for application in extreme climatic conditions  
The invention relates to an ultrasound transducer in particular for application in ultrasound anemometry, comprising an electromechanical transducer ( 1 ) with an acoustically active surface, an...
7113447 Laser pumped compact acoustic sensor system  
An acoustic transducer system for acoustic signals in water has at least one hollow spherically-shaped shell for vibrating in response to acoustic signals impinging from the water. The hollow...
7058555 Predictor for optimal selective power transfer  
A predictor for optimal transducer power gain computes the maximum transducer power gain attainable by a lossless matching network for a given load operating over selected non-overlapping...
6954406 Acoustical source and transducer having, and method for, optimally matched acoustical impedance  
The invention, in its several embodiments, includes a method of making a plurality of impedance-matched layers interposed between an acoustical source and a target media providing optimal...
6831876 Acoustic window  
An improved acoustic window for an acoustic waveform passage having a generally uniform transmission loss at an angle of incidence of between −40° and +40°. The composition is formed from at...
6788620 Acoustic matching member, ultrasound transducer, ultrasonic flowmeter and method for manufacturing the same  
An acoustic matching member that is incorporated into an ultrasonic transducer for transmitting and receiving ultrasonic waves, includes: at least two layers including a first layer and a second...
6776051 Ultrasonic transducer and ultrasonic flowmeter using same  
It is an object of the present invention to provide an ultrasonic transducer, which is so configured as to reduce the variations in characteristics, thereby to enable the stabilization of the...
6690620 Sonar transducer with tuning plate and tuning fluid  
A method for maximizing the radiated power of a transducer, such as a sonar transducer, includes providing a transducer system comprising a transducer operating at a frequency f and having a...
6622092 Predictor for optimal broadband impedance matching  
A predictor for optimal broadband impedance matching of the present invention computes the maximum value of transducer power gain possible for any impedance matching network for a given...
6545947 Acoustic matching material, method of manufacture thereof, and ultrasonic transmitter using acoustic matching material  
An acoustic matching member 1 is used, when a sound is propagated from a first object to a second object, for matching an acoustic impedance of the first object and an acoustic impedance of the...
6487324 Stepped acoustic impedance-matching transformer for very narrow channel acoustic traveling wave lens waveguide  
An acoustic impedance-matching transformer includes a tapered acoustic energy transmission (metal) block, having an acoustic impedance less than that of a piezo-electric transducer in a metric...
6418084 Ultrasonic probe and method of manufacturing the same  
An ultrasonic probe includes a piezoelectric element for transmitting and receiving ultrasonic waves and an acoustic lens provided on an ultrasonic transmission/reception side of the piezoelectric...
6400648 Ultrasonic waveguide  
An ultrasonic waveguide for guiding an ultrasonic signal situated in a predetermined frequency range is illustrated and described. The ultrasonic waveguide according to the invention is...
5761156 Piezoelectric ultrasonic transducer  
The invention relates to a piezoelectric transducer particularly for use in transit time measurements. The object of the invention is to provide a piezoelectric transducer which ensures an in-phase...
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...
5706252 Wideband multifrequency acoustic transducer  
The invention relates to multifrequency acoustic transducers exhibiting a wide band around each resonant frequency. It consists in inserting between a λ/2 active emitter plate (201) and the soft...
5658534 Sonochemical apparatus  
A liquid is subjected to ultrasound within a stainless steel pipe (35) of wall thickness 2.5 mm. Three ultrasonic transducers (56) are equally spaced around the pipe, each fixed to one end of a...
5553035 Method of forming integral transducer and impedance matching layers  
A method of forming a transducer device having integral transducer and impedance matching portions includes forming grooves partially through a thickness of a piezoelectric member. A groove volume...
5452265 Active acoustic impedance modification arrangement for controlling sound interaction  
An active impedance modification device or arrangement enables the interaction of sound with a structural surface to be controlled, e.g., so that, reflections from that surface (which can be the...
5434827 Matching layer for front acoustic impedance matching of clinical ultrasonic tranducers  
An ultrasonic probe having one or more piezoelectric ceramic elements, each having a respective bulk acoustic impedance. Each element has a respective front face and a respective piezoelectric...
5418759 Ultrasound transducer arrangement having an acoustic matching layer  
In an ultrasound transducer arrangement having an electroacoustic transducer part, at least one acoustic matching layer is allocated to the transducer part. The acoustic matching layer is composed...
5392259 Micro-grooves for the design of wideband clinical ultrasonic transducers  
An ultrasonic probe including one or more piezoelectric ceramic elements mounted on an acoustically damping support body. Desired acoustic signals are transmitted and received through a front...
5375099 Transducer with acoustic matching member and method of making the transducer  
A method for bonding together adjoining hollow glass spheres to form an acoustic matching member for a transducer comprises subjecting a mixture of adjoining spheres and a solution of a heat...
5371717 Microgrooves for apodization and focussing of wideband clinical ultrasonic transducers  
An ultrasonic probe including one or more piezoelectric ceramic elements mounted on an acoustically damping support body. Desired acoustic signals are transmitted and received through a front...
5343443 Broadband acoustic transducer  
An acoustic transducer having impedance matched layers that can be deployed in environments having wide temperature variations. An anisotropic layer provides a low coefficient of thermal expansion...
H001290 Conformable acoustic coupler  
A conformable acoustic coupler for ultrasonically testing an article. The upler has an ultrasonic transducer with an active surface which transmits ultrasonic energy pulses to an article to be...
5267221 Backing for acoustic transducer array  
An acoustic transducer assembly is provided having a one or two dimensional array of transducer elements, an electrical circuit element such as a circuit element and a backing for interconnecting...
5212671 Ultrasonic probe having backing material layer of uneven thickness  
An ultrasonic probe includes a piezoelectric material layer having a pair of electrodes provided on both main surfaces thereof for applying voltage thereto, and a backing material provided on one...
5172344 Deep submergence transducer  
A transducer assembly providing a conversion between the electrical and sonic energy, the transducer assembly being adapted for operating submerged at great depths in ocean waters. The transducer...
5155708 Acoustic wave sensor and method of making same  
A hydrophone for calibrating lithotripters includes a spot poled disc of piezoelectric material which is mounted on a brass cylinder backing. A coaxial cable is electrically connected to one...
5093810 Matching member  
An acoustic matching member for a sonic transducer is disclosed which comprises a solid material, for example, a glass, in which a plurality of voids have been formed. A method is also included of...
5065372 Sonar transducer with explosive shock protector  
The sonar transducer is protected from explosion shock by a variable impedance device, such as a metal oxide varistor, connected in parallel with the energy conversion component. The varistor...
5050128 Ultrasonic probe having an ultrasonic propagation medium  
Disclosed is an ultrasonic probe for use in medical diagnostic systems for examination within a human body. The ultrasonic probe comprises an array of transducer elements for transmission of...
5033032 Air-gap hydrophone  
A hydrophone for the detection of sound or vibrational waves, comprising a piezo electric transducer within a Faraday cage such that it is in contact with and yet isolated from a deformable...
4982386 Underwater acoustic waveguide transducer for deep ocean depths  
A deep submergence, acoustically stable directional transducer uses a wavide and an encapsulant to channel sound. The waveguide forms an air space with a housing so that radiated sound is totally...
4972826 Shock wave generator for an extracorporeal lithotripsy apparatus  
A shock wave generator for use in an extracorporeal lithotripsy apparatus has a liquid-filled housing with an exit aperture for shock waves which are electromagnetically generated and conducted to...
4922469 Acoustic characteristics changing device having variable characteristics  
An acoustic characteristics changing device includes a frame member disposed in an acoustic energy field, electro-acoustic conversion means attached to the frame member to constitute at least a...
4881212 Ultrasonic transducer  
This invention is basically, an ultrasonic transducer that can be configured with good reproducibility, that includes an acoustic impedance matching member that gradually changes the acoustic...
4838070 Method and apparatus for dry testing water-immersible acoustic transducers  
A method of testing piezo-electric transducers includes locating one end (11) of a rod (10) of solid material over the active head (20) of the transducer, the rod (10) simulating the normal...
4833360 Sonar system using acoustically transparent continuous aperture transducers for multiple beam beamformation  
An acoustic transducer array includes a number of transparent continuous aperture transducer elements which are aimed at various angular sectors in a field of view and are embedded in an...
4829494 Acoustic pinger for use in high speed water entry test bodies  
Tracking and location of a high speed water rentry vehicle is assured by the inclusion of an acoustic source. An acoustic generator in the form of a piezoelectric transducer is potted in...
4821838 Acoustic damper  
An acoustic damper for substantially reducing the reverberation echoes at the junction between an acoustic signal propagating fluid and a material having an acoustic impedance substantially...
4789971 Broadband, acoustically transparent, nonresonant PVDF hydrophone  
An acoustically transparent voided, polyvinylidene fluoride (PVDF) hydrope made of material whose impedance matches the characteristic acoustic impedance (ρc) of sea water, having drastically...
4717851 Adaptation layer for an ultrasound applicator  
An adaptation layer for an ultrasound applicator which contains a mixture of synthetic resin and ceramic powder. Through the addition of ceramic powder, the acoustic impedance of the applicator can...
4698541 Broad band acoustic transducer  
There is provided by this invention a broad band acoustic transducer comprising a piezoelectric crystal with a two layer dampening backing having very high attenuation properties. Each layer has an...
4694440 Underwater acoustic wave transmitting and receiving unit  
An underwater acoustic wave transmitting and receiving unit having excellent characteristics for both transmitting and receiving and providing stable characteristics over long operating periods. A...
4672591 Ultrasonic transducer  
An ultrasonic transducer comprises a support body, a piezoelectric layer of a material with a relatively high dielectric constant and high acoustic impedance, a first impedance matching layer and a...
4616152 Piezoelectric ultrasonic probe using an epoxy resin and iron carbonyl acoustic matching layer  
An ultrasonic probe for an ultrasonic medical diagnostic apparatus which is composed of a piezoelectric vibrator with electrodes attached onto both surfaces thereof and one or two acoustic matching...
Matches 1 - 50 out of 102 1 2 3 >