A structure of an acoustic transducer array probe for transmission of acoustic waves from a front radiation surface into an acoustic load material, where said acoustic waves can have frequencies in a high frequency (HF) band and further lower frequency (LF1, . . . , LFn, . . . , LFN) bands with N1, arranged in order of decreasing center frequency. The acoustic waves are transmitted from separate high and lower frequency arrays stacked together with matching layers in a thickness dimension into a layered structure, with at least a common radiation surface for said high and lower frequency bands. At least for said common radiation surface at least one lower frequency LFn electro-acoustic structure (n=1, . . . , N) comprises a piezoelectric array with an acoustic isolation section to its front face. The acoustic isolation section includes to the front a section composed of a sequence of L3 matching layers with interchanging low and high characteristic impedances, where the front layer of said section is one of i) a lower characteristic impedance layer, and ii) a higher characteristic impedance layer, and where at least one lower characteristic impedance layer is made of a homogeneous material.

An apparatus and system for deploying an acoustic sensor are disclosed. In some embodiments, an acoustic sensor includes a transducer comprising a piezoelectric material layer having a front side from which the transducer is configured to transmit acoustic sensing signals and an opposing back side. A backing material layer comprising an acoustic damping material is coupled at a front side to the back side of the piezoelectric material layer. An acoustic reflector such as may comprise a cavity containing gaseous or liquid fluid is disposed between the front side and a back side of the backing material layer.

An ultrasonic transducer includes a carrier with a first surface and a second surface which are opposite to each other, a piezoceramic element attached on the first surface of the carrier, a first acoustic matching layer with a third surface and a fourth surface which are opposite to each other, the third surface is attached on the second surface of the carrier, wherein the first acoustic matching layer includes a mesh with openings, and the thickness of first acoustic matching layer is smaller than wavelength of an ultrasonic wave emitted by the piezoceramic element in the first acoustic matching layer in an operating frequency, and a total area of the openings of mesh is larger than 30% area of the third surface of first acoustic matching layer, and a second acoustic matching layer disposed on the fourth surface of the first acoustic matching layer.

Ultrasonic devices include a transducer having a piezoelectric element therein that may operate as an acoustic signal receiving surface and/or an acoustic signal generating surface. At least one acoustic matching layer is provided on the piezoelectric element. This at least one acoustic matching layer may be configured as a composite of N acoustic matching layers, with a first of the N acoustic matching layers contacting the primary surface of the piezoelectric element. This first acoustic matching layer may have an acoustic impedance equivalent to Z.sub.L1, where N is a positive integer greater than zero. In some embodiments of the invention, the magnitude of Z.sub.L1 may be defined as: 0.75 ((Z.sub.p).sup.N+1(Z.sub.g)).sup.1/(N+2)Z.sub.L11.25 ((Z.sub.p).sup.N+1(Z.sub.g)).sup.1/(N+2), where Z.sub.p is the acoustic impedance of the piezoelectric element (e.g., lead zirconate titanate (PZT)) and Z.sub.g is the acoustic impedance of a compatible gas.

Provided are a resin material that provides a resin shaped article (such as a resin sheet) having an acoustic impedance close to that of a living body, a reduced acoustic wave attenuation even at high frequencies (such as 10 MHz), and high hardness and high tear strength, and that is suitable as a lens material for acoustic wave probes; an acoustic lens, an acoustic wave probe, an acoustic wave determination device, an ultrasound diagnostic apparatus, a photo-acoustic wave determination device, and an ultrasonic endoscope that employ the above-described resin material as a constituent material; and a method for producing the above-described acoustic lens.

Systems and devices are provided for generating focused ultrasound pulses based on a transducer assembly having a piezoelectric layer coupled to an acoustic lens. In some example embodiments, the piezoelectric layer is a composite piezoelectric material having an acoustic impedance configured to match the acoustic impedance of the acoustic lens. The acoustic lens may be formed from aluminum, or an alloy thereof, and may have a distal surface having a non-spherical profile for producing a focal region that is smaller than an equivalent spherical lens. The acoustic lens may have an f-number less than unity. In some embodiments, the acoustic lens is coated with a polymer acoustic impedance matching layer that is compatible with deposition via chemical vapor deposition, such as a p-xylylene based polymer. In some embodiments, the acoustic lens is formed from aluminum or an alloy thereof, and the polymer acoustic impedance matching layer is a Parylene layer.

Ultrasound transducer assemblies and associated systems and method are disclosed herein. In one embodiment, an ultrasound transducer assembly includes at least one matching layer overlies a transducer layer. A plurality of kerfs extends at least into the matching layer. In some aspects, the kerfs are at least partially filled with a filler material that includes microballoons and/or microspheres.

Disclosed herein is an ultrasonic probe including a piezoelectric layer, a matching layer disposed at an upper portion of the piezoelectric layer, a conductive member disposed at a lower portion of the piezoelectric layer, a second connector coupled to at least one side of the conductive member, and a printed circuit board coupled to a side of the second connector and electrically coupled to the second connector.

A printed circuit board is disposed outside a laminated structure of the acoustic element so that the printed circuit board can be prevented from affecting acoustic characteristics of the ultrasonic probe, a failure in a process of manufacturing the ultrasonic probe that occurs due to a change in temperature or humidity can be prevented, and the manufacturing process can be relatively simplified.

An ultrasound probe includes a transducer layer, a first matching layer, a lens layer, and a backing layer. The first matching layer is disposed at a first side of the transducer layer and a material of the first matching layer is PMMA or PO. The lens layer is disposed at the first side of the transducer layer and the first matching layer is located between the transducer layer and the lens layer. The backing layer is disposed at a second side of the transducer layer, wherein the first side is opposite to the second side.

A Wi-Fi tank monitor ultrasonically monitors liquid fuel oil in fuel oil tanks, as well as other liquids in respective liquid tanks. A transducer is magnetically attached to the bottom of a steel oil tank which will transmit ultrasonic pulses through the bottom of the tank and into the oil or other liquid. This wave is reflected by the top of the oil in the tank and be detected by the transducer on the bottom of the tank yielding the height of the oil or other liquid.