An acoustic lens is presented that redirects high frequency voice sounds over a barrier to improve the intelligibility of speech when a protective barrier is used to isolate people from each other. The acoustic lens includes curved sheets to delay sound to create focal points on each side of a barrier, where the focal points are lower than the top of the barrier.

An acoustic lens is presented that redirects high frequency voice sounds over a barrier to improve the intelligibility of speech when a protective barrier is used to isolate people from each other. The acoustic lens includes curved sheets to delay sound to create focal points on each side of a barrier, where the focal points are lower than the top of the barrier.

The present disclosure relates to an ultrasound transducer and a control method thereof. More particularly, the present disclosure is related to an ultrasound transducer for facilitating waste clearance of the brain lymphatic system and a control method thereof. A transducer according to the present disclosure includes: an oscillator including a plurality of Piezoelectric materials, and a polymer encompassing the plurality of Piezoelectric materials, and irradiating an ultrasound using at least one of the plurality of Piezoelectric materials and the polymer; a lens having a first space where at least a part of the oscillator is inserted, and focuses the applied ultrasound; and a housing supporting connection between the oscillator and the lens, wherein a height of the oscillator is longer than a height of the first space, a first height difference between the height of the oscillator and the height of the first space is inverse proportion to overall height of the lens, and a width of the oscillator is smaller than a width of the first space.

Disclosed herein are implementations of acoustic metamaterial structures and geometric configurations of acoustic metamaterial structures which produce sound amplification or cancellation. An acoustic metamaterial device for using with a sound source includes a plurality of fins, where each fin is made from a very dense material with respect to air which creates the anisotropic properties of the acoustic metamaterial device, where each fin has a length dimension, a width dimension, and a thickness dimension, the width and length dimension being equal and substantially perpendicular to the direction of sound wave propagation from the sound source, where each fin is sized different from other fins along the width and length dimension, and where the plurality of fins are interconnected such that planes formed by the width and length dimension of each fin faces perpendicular to the sound wave propagation direction from the sound source.

An acoustic lens for an ultrasonic probe includes a vulcanization-molded article of a rubber composition including a first silicone rubber composition having a plasticity number of 100 or less, and a second silicone rubber composition having a plasticity number of 150 or more and 300 or less.

An acoustic lens system comprises one or more speakers and a substrate. The speaker comprises a driver capable of receiving an audio signal and a wave forming member in communication with the driver and having a sloped surface. The speaker is adapted to abut the substrate. In use, the driver causes translation of the wave forming member in response to the audio signal. The translation of the wave forming member causes the sloped surface to generate an audio waveform that extends in a direction divergent to the direction of translation. The speaker also generates forces against the substrate so that a ripple wave is propagated along the substrate. The propagation of the ripple wave is projected perpendicularly at a location on the substrate to generate a sound wave from the substrate. The sound wave generated by the ripple wave and the divergently extending wave from the wave forming member intersect at a position away from the speaker thereby creating an immersive sound experience for the user.

An acoustic lens system comprises one or more speakers and a substrate. The speaker comprises a driver capable of receiving an audio signal and a wave forming member in communication with the driver and having a sloped surface. The speaker is adapted to abut the substrate. In use, the driver causes translation of the wave forming member in response to the audio signal. The translation of the wave forming member causes the sloped surface to generate an audio waveform that extends in a direction divergent to the direction of translation. The speaker also generates forces against the substrate so that a ripple wave is propagated along the substrate. The propagation of the ripple wave is projected perpendicularly at a location on the substrate to generate a sound wave from the substrate. The sound wave generated by the ripple wave and the divergently extending wave from the wave forming member intersect at a position away from the speaker thereby creating an immersive sound experience for the user.

Apparatus, systems, and methods for investigating a subsurface volume of interest from a borehole. Apparatus comprise an enclosure configured for conveyance along the borehole; an acoustic source in the enclosure configured to generate acoustic signals; a lens assembly disposed in the enclosure and next to the acoustic source, the lens assembly being formed of a plurality of lens elements; wherein each lens element comprises a plurality of cells arranged in a curvilinear cell array, each cell formed as a column oriented transverse to a direction of travel of the acoustical signals. The plurality of cells may be arranged according to a conformal mapping geometry, including a canonical Bipolar conformal mapping transformation of constant [u,v] contour lines to [x,y] Cartesian coordinates. A portion of the cells are scaled down in size by a scale factor. The scale factor corresponding to each cell of the portion varies non-monotonically along periodicity lines.

Apparatus, systems, and methods for investigating a subsurface volume of interest from a borehole. Apparatus comprise an enclosure configured for conveyance along the borehole; an acoustic source in the enclosure configured to generate acoustic signals; a lens assembly disposed in the enclosure and next to the acoustic source, the lens assembly being formed of a plurality of lens elements; wherein each lens element comprises a plurality of cells arranged in a curvilinear cell array, each cell formed as a column oriented transverse to a direction of travel of the acoustical signals. The plurality of cells may be arranged according to a conformal mapping geometry, including a canonical Bipolar conformal mapping transformation of constant [u,v] contour lines to [x,y] Cartesian coordinates. A portion of the cells are scaled down in size by a scale factor. The scale factor corresponding to each cell of the portion varies non-monotonically along periodicity lines.

In an embodiment, a probe device includes a portion having a curved surface and a plurality of tiles variously coupled to the curved surface. The tiles each include a plurality of piezoelectric transducer elements and a base adjoining and supporting the plurality of piezoelectric transducer elements. The probe device further comprises curved lens portions each coupled to a respective one of the plurality of tiles, wherein for each of the tiles, the plurality of piezoelectric transducer elements of the tile are to propagate a wave toward the respective curved lens portion. In another embodiment, the probe device further comprises a sheath material surrounding the curved lens portions.