A device for reducing foreign body response in a subject caused by an electrode implanted in a subject's tissue. A base is secured to the subject, having a base aperture in proximity to the target site. The base can receive and align a body thereon. A body contains a chamber extending between a chamber aperture, aligned with the base aperture, at one end and a chamber opening at an opposite end. The chamber contains an acoustic coupling medium, such as polyvinyl alcohol cryogel, transmits acoustic vibrations from a transducer without altering their frequency. The transducer is mounted to the device and is configured to transmit acoustic vibrations into the chamber and through said acoustic coupling medium to the subject tissue at the target site, creating an acoustic field in the target site sufficient to reduce foreign body response in the subject where the electrode contacts the target tissue.

A vibration device includes a light-transmissive body, and a vibrator to vibrate the light-transmissive body at a vibration acceleration of equal to or more than about 1.5×10.sup.5 m/s.sup.2 and equal to or less than about 8.0×10.sup.5 m/s.sup.2.

Electroacoustic device (5) for generating at least one acoustic wave (Fv,Vx), the device comprising a piezoelectric substrate (10) and first (15) and second (20) groups of electrodes (60,65,70,75) arranged on the substrate, each electrode of the first and second groups comprising a track (80.sub.a-f,85.sub.a-f,90.sub.a-d,95.sub.a-d), the tracks (90.sub.a-d,95.sub.a-d) of the electrodes of the first group spiralling around a same spiral axis (Z) along a first winding direction (W.sub.1), and the tracks (80.sub.a-f,85.sub.a-f) of the electrodes of the second group spiralling around said spiral axis along a second winding direction (W.sub.2) opposite to the first winding direction.

An ultrasonic/megasonic cleaning device includes a cleaning unit including an upper casing and a lower casing connected to form a hollow chamber, an ultrasonic/megasonic generator provided in the hollow chamber, and a bottom quartz component provided with a quartz rod array composed of a plurality of vertically arranged quartz rod-like structures; a spray arm connected to the upper casing; and an ultrasonic/megasonic frequency control unit connected between the at least one signal source and the ultrasonic/megasonic generator, for constantly varying a frequency of the electrical signal output from the at least one signal source and introducing the electrical signal into the ultrasonic/megasonic generator, so as to dynamically vary an oscillation frequency of the ultrasonic/megasonic wave generated by the ultrasonic/megasonic generator; wherein the ultrasonic/megasonic frequency control unit includes a frequency-switching timing control unit configured to trigger am ultrasonic/megasonic frequency switching control unit to switch the oscillation frequency of the ultrasonic/megasonic wave from a first frequency to a second frequency when the ultrasonic/megasonic wave has been generated at the first frequency for a time period, the time period being randomly selected within a time range.

A female screw portion 24 is formed over the entire length of a through hole 23 passing through an axis of an ultrasonic horn 13, first and second male screw portions 25, 26 formed on the ultrasonic horn 13 side of axes of first and second boosters 14, 15 are screwed into the female screw portion 24, the ultrasonic horn 13 and the first and second boosters 14, 15 are fastened coaxially, leading ends 27, 28 of the first and second male screw portions 25, 26 are not in contact with each other inside the through hole 23, and a cutting blade 12 is attached to an outer periphery of a base portion 20 of the ultrasonic horn 13 having a space portion 29 surrounded by an inner wall of the through hole 23 and the leading ends 27, 28 of the first and second male screw portions 25, 26.

An ultrasound transducer of a vehicle system, comprising a membrane configured to vibrate to generate an ultrasound when voltage is applied and further configured to vibrate in an out-of-plane movement, wherein the membrane includes a first piezoelectric film at a center of the membrane, a supporting member including a second piezoelectric film, the supporting member supporting and surrounding the membrane, wherein in response to a translation of motion or actuation from the membrane, the supporting member mode does not move when there is the out-of-plane movement from the membrane.

A cartridge for a high intensity focused ultrasound (HIFU) device and a piezoelectric linear motor are disclosed. By using the cartridge for a HIFU device according to the present invention, a transducer module is coupled to a piezoelectric linear motor driveable in water and embedded in the cartridge, heat generated when a conventional step motor is driven is fundamentally removed, an additional cooling fan is not needed, ultra-low power consumption and ultra-precise transfer can be realized, and thus an effective procedure can be performed. A skin beauty device may include ultrasound and high frequency units, apply a high frequency to a skin to be treated so as to crack a stratum corneum, and apply ultrasound to the skin to be treated, and thus a medicament drug can easily penetrate the treated skin. In addition, the piezoelectric linear motor in which a piezoelectric actuator and a moving shaft are stably coupled is provided.

An ultrasonic transducer includes first and second acoustic transducers and a housing with a bottomed tubular shape. The second acoustic transducer includes an annular section supporting a second membrane section and contacting an entire periphery of the second membrane section, and an acoustic matching plate facing the second membrane section and spaced apart from the second membrane section. The acoustic matching plate is connected to a surrounding wall portion defining a sealed space with the housing. An ultrasonic transmission path sandwiched between the first membrane section and the second membrane section is provided in the sealed space. A maximum inner width of the ultrasonic transmission path is smaller than a maximum inner width of the surrounding wall portion.

A nebulizer for producing an inhalable mist of droplets, comprising at least an aerosol generator, a housing having a liquid reservoir and control electronics, the aerosol generator consisting at least of a membrane, a piezo element and a substrate plate, and the control electronics comprising at least an RF generator, a controller, memory and switching elements, and an inductor. The aerosol generator forms a resonant circuit together with the inductor and the control electronics are configured to at least partly excite the aerosol generator to vibrate. The aerosol generator is configured such that aerosol droplets are producible by vibrations and the RF generator is configured to vary the amount of aerosol produced.

A vibration device includes a vibrator including a cylinder including an opening, a light-transmissive cover directly or indirectly coupled to the cylinder to cover the opening of the cylinder, and a piezoelectric element to vibrate the light-transmissive cover, and including an opening end portion, an elastic member holding the opening end portion of the vibrator, and a case connected to the elastic member.