Abstract: A helmet features a sound management mechanism within a hard exterior shell and an interior of expanded polystyrene foam. Ear cups embedded within the shell surround the ears, with a torus-shaped soft material forming a seal against the wearer's head. The helmet allows the transition of ear cups between engaged and disengaged positions. The engaged position is against the head. The disengaged position is away from the head, allowing easy placement and removing of the helmet. Positions may be transitioned using one hand. The helmet may include lateral adjustment of ear cups, and some versions incorporate electronic audio features like noise cancellation, communication capabilities, and wireless connectivity.

Abstract: Described herein is an acoustic building panel comprising a body comprising inorganic fiber in an amount ranging from about 60.0 wt. % to about 90.0 wt. % based on the total weight of the body; and microfibrillated fiber in an amount ranging from about 0.5 wt. % to about 10 wt. % based on the total weight of the body.

Abstract: Various arrangements of electronic devices, such as assistant devices, are detailed herein. Such a device can include a housing and a microphone. A microphone aperture can be defined by the housing that directs sound from outside the housing to the microphone. A cover, which can be fabric, can be attached with the outside of the housing. An adhesive ring on the housing around the microphone aperture can be used to attach the cover to the housing.

Abstract: A wavelength conversion element according to an embodiment of the present disclosure includes: a phosphor layer; a refrigerant; a refrigerant transport member; and a housing. The phosphor layer includes a plurality of phosphor particles. The phosphor layer has a gap therein. The refrigerant cools the phosphor layer. The refrigerant transport member is provided in contact with the phosphor layer. The refrigerant transport member circulates the refrigerant. The phosphor layer, the refrigerant, and the refrigerant transport member are encapsulated in the housing.

Abstract: An assembly has a chair with at least one arm. The arm has a cavity formed therein. The cavity has a bottom and a side wall. A cup is removably received in the cavity. The cup has a bottom surface and an outer wall. The cup is rotatable within the cavity. The cup has at least one projection extending upwardly from a bottom surface of the cup. This projection is adapted to support a phone thereagainst. The cup is movable between a first position in which the projection is exposed outwardly of the chair, a second position in which the projection is stowed in the cavity and a third position in which the cup is positioned beneath the cavity.

Abstract: A handheld instrument for endoscope surgery includes a shaft, a jaw, a handle, a phased array ultrasonic sensor, and a signal wiring. The jaw is placed at one end of the shaft and has a holding function. The handle is placed at the other end of the shaft and includes an operation mechanism for operating the jaw. The phased array ultrasonic sensor is mounted on the jaw and has an imaging function. The signal wiring is provided to the shaft and connects the ultrasonic sensor and the handle.

Abstract: A broadband ultrathin acoustic wave diffusion structure has a plurality of acoustic wave diffusion units. Each acoustic wave diffusion unit has at least one acoustic wave propagation section, and an acoustic wave focused section communicating with the acoustic wave propagation section is arranged according to needs. The acoustic wave focused section is formed by an acoustic wave focused cavity filled with acoustic material. The acoustic wave focused cavity is a variable-section cavity. The acoustic wave propagation section is formed by a simply connected acoustic wave propagation passage with a close end. Different acoustic wave diffusion units have different lengths of the simply connected acoustic wave propagation passages. The maximum length of the simply connected acoustic wave propagation passage may be dozens or even hundreds of times of the thickness of the acoustic wave diffusion structure, which can meet the diffusion requirements for low frequency acoustic waves to the maximum extent.

Abstract: Ultrasonic horns having improved longevity and simplified manufacturing approaches that can be more easily adapted to ultrasonic reactor chambers or batch processing containers. The ultrasonic horn designs increase the uniformity and intensity of acoustic energy radiated into a liquid medium and thus better correspond to the requirements of a particular sonochemical or sonomechanical process. The ultrasonic horns do not require a specific number of cylindrical sections and allow for various lengths and profiles of variable-diameter sections. The ultrasonic horns also reduce stress in the material of the ultrasonic horns and therefore extend longevity.

Abstract: An ultrasonic air data system (UADS) can include a body configured to mount to an aircraft, an acoustic signal shaping feature associated with the body, and an acoustic source operatively connected to the acoustic signal shaping feature, the acoustic source configured to emit a directional acoustic signal. The acoustic signal shaping feature can be configured to reshape the directional acoustic signal from the acoustic source into an at least partially reshaped signal. The system can include one or more acoustic receivers disposed on or at least partially within the body for receiving the reshaped signal.

Abstract: A transducer is provided for emitting and receiving acoustic waves, a method for operating and a method for producing the same. The transducer comprises a casing that forms a cavity. The casing comprises an excitation surface and an emitting surface, which is arranged opposite to the excitation surface. A transducer element is provided at the excitation surface, and an acoustic diffuser is provided at the emitting surface of the casing, wherein a diffusing structure of the acoustic diffuser faces the cavity, and wherein the diffusing structure is provided by an array of columns.

Abstract: A waveguide (1) comprising a shell (11, 12) having an inlet opening (110, 120) intended to receive acoustic energy and an outlet opening (111, 121) for emitting acoustic energy; and a phase plug (13, 14) located into the shell (11, 12) so as to define therebetween a pathway (W) for the acoustic energy from the inlet opening (110, 120) to the outlet opening (111, 121). The acoustic pathway (W) has a longitudinal extension direction (D) between the openings (110, 120, 111, 121) and the directions of all longitudinal splines (S1, S2, S3, S4, S5, S6) of the pathway (W) are perpendicular to the inlet opening (110, 120) at the inlet opening (110, 120) on one ideal longitudinal surface.

Abstract: The waterproof member of the present disclosure includes a waterproof membrane configured to prevent entry of water while permitting sound and/or gas to pass therethrough, and a support layer having air permeability in a thickness direction thereof. The waterproof member has a joining region where the waterproof membrane and the support layer are joined, and a non-joining region where the waterproof membrane and the support layer are spaced apart from each other. The non-joining region is surrounded by the joining region when viewed in a direction perpendicular to a main surface of the waterproof membrane. A thickness of the support layer in the non-joining region is 500 ?m or less. A spacing distance between the waterproof membrane and the support layer in the non-joining region is 150 ?m or less. An air resistance in an in-plane direction of the support layer is greater than 80,000 seconds/100 mL.

Abstract: A laminate having excellent sound absorbing performance in both of a low frequency range and a high frequency range, and is excellent in flexibility, includes a woven fabric layer and a nonwoven fabric layer. The woven fabric layer contains a fiber having a total fineness of 150 to 500 dtex in an amount of 40% by mass or more based on the woven fabric layer in total, a value obtained by dividing a difference between a weave density in a warp direction of the woven fabric layer and a weave density in a weft direction of the woven fabric layer by a smaller one of the weave density in the warp direction of the woven fabric layer and the weave density in the weft direction of the woven fabric layer is 0.5 to 3.5. The woven fabric layer has a basis weight of 100 to 400 g/m2, a thickness of 0.3 to 2.0 mm, and an air permeability of 15 to 40 cm3/cm2/s. The nonwoven fabric layer has a basis weight of 200 to 500 g/m2 and a thickness of 5 to 40 mm.

Abstract: Provided is a sound direction detection sensor capable of detecting a direction from which sound is coming by using a multi-resonator array. The disclosed sound direction detection sensor includes two resonator arrays, each including a plurality of resonators having different resonance frequencies. The two resonator arrays have different directivities. Each resonator array serves as an audio sensor, and the sound direction detection sensor detects a direction from which sound is incident, regardless of a distance between audio sensors.

Abstract: The present invention provides a self-positioning system of a deepwater underwater robot of an irregular dam surface of a reservoir, including cross reflection metal plates arranged on the irregular dam surface, and an underwater robot provided with a control motherboard, a water level indicator and a sonar system, wherein the water level indicator and the sonar system are respectively connected with the control motherboard, and the control motherboard is connected with a computer via a cable. The cross reflection metal plate has known coordinates and has four quadrants. A sonar signal emitted by the sonar system is reflected by the cross reflection metal plate to generate sonar reflection signals of four quadrants, and the sonar signals in the effective quadrants correspond to known coordinate parameters of the cross reflection metal plate so as to obtain the horizontal distance between the underwater robot and the irregular dam surface.

Abstract: An object of the present invention is to obtain a high pressure fuel supply pump capable of reducing pressure pulsation that occurs in a low pressure pipe, preventing damage to the low pressure pipe, or reducing noise due to vibrations of the low pressure pipe.

Abstract: A contoured branch fitting for reducing stress in a header pipe caused by acoustic induced vibration that includes a maximum width, a maximum length, a thickness that is greater along the maximum length and a constant radius between the branch connection and the header connection.

Abstract: A contoured branch fitting for reducing stress in a header pipe caused by acoustic induced vibration that includes a maximum width, a maximum length, a thickness that is greater along the maximum length and a constant radius between the branch connection and the header connection.

Abstract: In one general aspect, various embodiments are directed to an ultrasonic surgical instrument that comprises a transducer configured to produce vibrations along a longitudinal axis at a predetermined frequency. In various embodiments, an ultrasonic blade extends along the longitudinal axis and is coupled to the transducer. In various embodiments, the ultrasonic blade includes a body having a proximal end and a distal end, wherein the distal end is movable relative to the longitudinal axis by the vibrations produced by the transducer.

Abstract: A method for reproducing an acoustic signal from a digital signal, the digital signal being formed of successive bit sequences each having bits representative of the amplitude of an acoustic signal at a time sample, the method including (i) providing a plurality of transducers configured to emit acoustic signals that are wave trains having each a duration lower or equal to the duration of one time sample and including at least one oscillation per time sample, and (ii) successively, for each bit sequence, having each bit associated to at least one of the transducers and independently govern, depending on its value, amplitudes of the acoustic signals emitted by its associated transducers.

Abstract: A transducer is provided for emitting and receiving acoustic waves, a method for operating and a method for producing the same. The transducer comprises a casing that forms a cavity. The casing comprises an excitation surface and an emitting surface, which is arranged opposite to the excitation surface. A transducer element is provided at the excitation surface, and an acoustic diffuser is provided at the emitting surface of the casing, wherein a diffusing structure of the acoustic diffuser faces the cavity.

Abstract: A rail vehicle compressor system and method for controlling the same uses a compressor driven by an electrical machine via a drive shaft to produce compressed air for at least one compressed air tank, wherein the electrical machine can be activated at least indirectly via a control device for operating the electrical machine at at least one speed between a maximum speed and a minimum speed, wherein at least one pressure sensor determines the pressure for the control device and a final control element continuously influences the speed of the electrical machine, wherein activation of the final control element takes place via the control device in accordance with a sensor device, comprising at least one sensor element for sensing at least one external boundary condition of the rail vehicle.

Abstract: A computationally implemented system and method that is designed to, but is not limited to: electronically providing audio output information to one or more portions of a portable electronic device to be outputted from said portable electronic device via one or more acoustic ultrasonic signals; and electronically outputting, said one or more acoustic ultrasonic signals to be demodulated into one or more acoustic audio signals containing one or more portions of said audio output information at one or more locations spaced from said portable electronic device based at least in part according to said one or more acoustic ultrasonic signals and based at least in part according to one or more portable electronic device ultrasonic emitter arrangements. In addition to the foregoing, other method aspects are described in the claims, drawings, and text forming a part of the present disclosure.

Abstract: A waterproof member (20) includes a first adhesive layer (22), a second adhesive layer (24), and a porous layer (26). The porous layer (26) is disposed between the first adhesive layer (22) and the second adhesive layer (24). The first adhesive layer (22) and the second adhesive layer (24) each have a frame shape in plan view. When the first adhesive layer (22), the second adhesive layer (24), and the porous layer (26) are seen in plan view, the outer boundary of the porous layer (26) lies within the outer boundary of the first adhesive layer (22) and the outer boundary of the second adhesive layer (24). The first adhesive layer (22) is bonded directly to the second adhesive layer (24) in a region outside the outer boundary of the porous layer (26). The porous layer (26) has a peripheral surface that is shielded from outside by the first adhesive layer (22) and the second adhesive layer (24).

Abstract: An acoustic panel device includes a panel member and a mount. The panel member includes a porous material. The mount is arranged to captively support the panel member. The mount can be a frame that surrounds the panel member. The frame can define a channel, and a portion of the panel member is disposed in the channel.

Abstract: A device for transmitting sounds for intra-auricular earpiece, comprising an entrance opening extending along an entrance axis, said entrance opening being able to receive a sound emission source, an exit opening able to be presented in an ear and a diffusion enclosure able to conduct the sound from upstream to downstream from said entrance opening to said exit opening, said diffusion enclosure comprising, opposite said entrance opening, a first vibration wall extending orthogonally to the entrance axis able to resonate following a sound emission along said entrance axis.

Abstract: A gas turbine engine including a hybrid waveguide for placement adjacent a flow path for hot combustion gases in the engine is presented. The waveguide includes first and second opposing ends and a first section formed of a first material extending from a transition region to the first end and a second section formed of a second material extending from the transition region to the second end. The first material is a metal or a ceramic and the second material is an electrically isolating material having a lower thermal conductivity than the material of the first section. A membrane may be used to isolate a cavity of the waveguide from combustion gas.

Abstract: The waterproof sound-permeable membrane of the present disclosure is a waterproof sound-permeable membrane adapted to permit passage of sound and prevent ingress of water. The air permeability of the waterproof sound-permeable membrane, as expressed by Gurley number, is 20 seconds/100 mL or more. The water entry pressure of the waterproof sound-permeable membrane is 500 kPa or more. When a tensile strength at break of the waterproof sound-permeable membrane in a MD direction is denoted by T1 and a tensile strength at break of the waterproof sound-permeable membrane in a TD direction orthogonal to the MD direction is denoted by T2, a strength ratio (T1/T2) is in a range of 0.5 to 2.0.

Abstract: A speaker device and an electronic device including the speaker device are provided. The electronic device includes a housing including an inner space and at least one through hole formed in a first direction, at least one speaker disposed in the inner space, directed toward the at least one through hole, a first structure disposed in the inner space, directed in a second direction different from the first direction, for vibrating along with vibration of the speaker generated when the speaker outputs first sound, and forming a first sound passage together with a part of the housing, and a second structure disposed in the inner space, directed in a third direction different from the first and second directions, for vibrating along with vibration of the speaker generated when the speaker outputs the first sound, and forming a second sound passage together with another part of the housing.

Abstract: An acoustic device such as a microphone or speaker is positioned with and coupled to a housing to connect an acoustic port of the acoustic device with an external opening of the housing. A reservoir is connected to the external opening via a bleed channel. The bleed channel may be less resistive to liquid ingress than the acoustic port. As such, the reservoir and bleed channel may redirect liquid from the external opening away from the acoustic port. In some implementations, the reservoir and/or the bleed channel may be defined by one or more acoustically permeable barriers such as meshes that cover the acoustic port, compressible materials such as foams that form a perimeter around the acoustic port, and/or adhesive layers that couple the acoustic device, the housing, and/or one or more other components.

Abstract: Acoustic diodes, devices incorporating such diodes and methods of using such devices are disclosed. An acoustic diode may include a periodic acoustic grating and a uniform plate. The periodic acoustic grating may include a plurality of gratings. The uniform plate may foe separated from the periodic acoustic grating by a resonant cavity. The acoustic diode may be configured to have a first transmission efficiency for acoustic waves incident on the periodic acoustic grating that is greater than a second transmission efficiency for acoustic waves incident on the uniform plate. The acoustic waves may have a wavelength within a range of wavelengths. Devices incorporating the acoustic diode may include medical imaging devices, such as ultrasound devices, and noise reduction devices.

Abstract: Use of sonar systems to collect dimensional and relational data for use in metrology, mapping, object and structure detection, survey and evaluation applications is disclosed. Systems and methods for collecting underwater data sets, using registration targets, for data registration of underwater acoustic data sets, as well as for data registration of underwater acoustic data sets with above-the-waterline data sets (e.g., laser-based data sets) are described.

Abstract: A system and method for controlling a sound level in a heating, ventilation, and air conditioning (HVAC) system are disclosed. The system includes a refrigeration unit including a compressor, a condenser fan, a controller, and a sound controller. The sound controller is configured to maintain a sound level of the refrigeration unit within a sound level operating range. A method of controlling a refrigeration unit for a heating, ventilation, and air conditioning (HVAC) system is described. The method includes determining, by a controller, a cooling requirement of a conditioned space. The controller also determines a sound level operating range for the refrigeration unit. The method further includes the controller applying a cooling setting based on the cooling requirement and the sound level operating range.

Abstract: The present invention relates to a complex filter and to a water purifier including a complex filter. By providing a complex filter for a water purifier including an antibacterial hollow fiber membrane, activated carbon fibers, ion-exchange fibers, and one or more activated carbon layers arranged in an optimized combination, the size of a water purifier can be reduced, and excellent water-purifying performance and an improved service life can be provided.

Abstract: The disclosure includes a sound system comprising at least one Digital Signal Processor control module, acting on a signal to the high-frequency transducer and on a signal to a mid-frequency transducer so as to apply, in a common frequency range, at least one magnitude parameter as well as at least one phase parameter so as to produce a directivity along the same angular sector as a directivity produced by the orientable shutters.

Abstract: Provided are a system and method for evaluating sound system performance, comprising: representing an audience space is represented on a surface of a sphere. The sphere has a center that is substantially collocated with a center of a sound system. An efficiency of the sound system is calculated by determining an amount of energy produced by the sound system that reaches the audience space projected onto the sphere relative to a total amount of energy produced by the sound system. A metric is generated for a function by normalizing the efficiency by a ratio of an area of the audience space relative to a total area of the sphere to produce a score for the performance of the sound system.

Abstract: A waterproof sound-transmitting member includes a waterproof sound-transmitting membrane and a support layer. The support layer includes a polyolefin-based resin foam. The support layer has a loss modulus of 1.0×107 Pa or less and a loss factor of 1.0×10?1 or more. The waterproof sound-transmitting membrane is, for example, a stretched porous polytetrafluoroethylene membrane. The waterproof sound-transmitting membrane may include an adhesive layer.

Abstract: A ferrite sintered body includes a crystal grain of a Ni—Zn ferrite and a grain boundary thereof, in which Ti is unevenly distributed in an outer region of the crystal grain, the outer region extending from an interface of the crystal grain to a length of 20% of a major axis of the crystal grain.

Abstract: The present invention is an extremely low frequency (ELF) microphone and acoustic measurement system capable of infrasound detection in a portable and easily deployable form factor. In one embodiment of the invention, an extremely low frequency electret microphone comprises a membrane, a backplate, and a backchamber. The backchamber is sealed to allow substantially no air exchange between the backchamber and outside the microphone. Compliance of the membrane may be less than ambient air compliance. The backplate may define a plurality of holes and a slot may be defined between an outer diameter of the backplate and an inner wall of the microphone. The locations and sizes of the holes, the size of the slot, and the volume of the backchamber may be selected such that membrane motion is substantially critically damped.

Abstract: A waterproof sound-transmitting membrane (1) of the present invention includes a porous membrane (11) containing polytetrafluoroethylene as a main component and a supporting member (12) that supports the porous membrane (11). The supporting member (12) is joined to the porous membrane (11) placed thereon and is not subjected to stretching after the porous membrane (11) is placed thereon. The supporting member (12) is a mesh or a net having a fiber diameter of 45 to 60 ?m and an opening size of 700 to 1100 ?m across the supporting member (12). The waterproof sound-transmitting membrane (1) has a water entry pressure of 20 kPa or more as measured according to the method B (high hydraulic pressure method) of JIS L 1092.

Abstract: A sound producing apparatus with multi-directivity has two or more speakers to produce music or other types of audio sounds. Each of the speakers can produce audio sounds in a certain direction and at least one speaker is steerable so that its sound propagation direction relative to the others can be changed. Furthermore, one or more speakers can produce audio sounds in an adjustable angular range. One or more of the speakers can be dual-mode speakers, each of which can be operated as a wide-angle speaker or a narrow-angle speaker. With multi-directivity, it is possible to play one type of music in one direction and another type of music in another direction to suit the interests of the audience. The apparatus can be a mobile phone, an audio player, a digital or analog recorder/player, or the like.

Abstract: A method for manufacturing a phase-change device may include the following steps: preparing a substrate; preparing a first dielectric layer, which may be positioned on the substrate; preparing a first electrode, which may be positioned in the first dielectric layer; forming a phase-change material layer, which may overlap the first electrode; processing (e.g., etching) the phase-change material layer to form a phase-change member, which may be electrically connected to the first electrode; forming an etch-stop layer, which may overlap and/or cover the phase-change member; forming an intermediary layer, which may be positioned on the etch-stop layer; forming a second dielectric layer, which may be positioned on the intermediary layer; and forming a second electrode, which may extend through the second dielectric layer, the intermediary layer, and the etch-stop layer and may be electrically connected to the phase-change member.

Abstract: A microphone device includes: a housing having an opening section in an upper face thereof; and a non-directional microphone unit incorporated in the housing and provided inside the opening section. The upper face of the housing has a shape in which a distance from an edge defined as a boundary between the upper face and a side face or a bottom face to the opening section throughout a whole circumference of the upper face changes in ½ or more of the whole circumference of the edge and an average value of the distance from the edge to the opening section is shorter than ½ of a wavelength of a sound wave in a frequency range in which an auditory sensitivity of humans is low.

Abstract: A transmission obscuring cover device obscures video and audio transmissions from an electronic apparatus. The device includes a panel having a bottom surface. An adhesive is coupled to the bottom surface for being adhered to an electronic apparatus. The panel is a sound absorber wherein the panel is configured for being positioned over a microphone of the electronic apparatus to inhibit transmission of sound to the microphone.

Abstract: Provided is a waterproof sound-transmitting membrane 1 including: a solid resin film 2 having a plurality of through holes 21 formed therein; and a treatment layer 3 having water repellency and formed on at least one of two surfaces of the resin film 2 that are opposite to each other in the thickness direction. The treatment layer 3 has openings 31 at positions corresponding to the through holes 21. The air permeability of the waterproof sound-transmitting membrane 1 is 100 seconds/100 mL or less in terms of Gurley number.

Abstract: A sound amplifier is provided in the form of a sound amplification cone with a front panel opposite a rear panel and spaced apart by side panels. The side panels fold so that the front panel and rear panel can collapse together or be deployed apart. The sound amplification cone is hinged to a tab which is held at least partially within a case. The case also holds a smart device therein. A slot in the case allows for the tab and sound amplification cone to slide into and out of the case when the cone is collapsed. When the sound amplification cone is slid out of the case and deployed, a port of the sound amplification cone is located adjacent speakers of the smart device to amplify sound therefrom. Auxiliary speakers and a power source can also be provided within the tab or sound amplification cone for further sound amplification.

Abstract: Disclosed herein is a waterproof sound-transmitting sheet having high sound transfer efficiency and excellent water proofing performance and a method for producing same. The waterproof sound-transmitting sheet includes: a sound-transmitting layer made of a polymer material and formed in the shape of a web having a plurality of pores; and a coating layer formed on at least one side of the sound-transmitting layer to block pores existing on the surface of the sound-transmitting layer.

Abstract: The present invention provides a device which is structured to direct the sound from the bottom of flat screen television sets to the listening audience. The device(s) is comprised of semi rigid black plastic resin and is of fire retardant grade. Adhesive tape is included for securing the article to the television.

Abstract: A system for inspecting the surface of a curved object is provided. This system includes an object having a curved surface; at least one substantially flat interdigital transducer, wherein the interdigital transducer is operative to generate surface energy waves; and at least one coupling device disposed between the curved surface and the substantially flat interdigital transducer, wherein the coupling device is operative to conform to the curved surface, support the interdigital transducer, and provide a medium through which the surface energy waves can effectively travel from the interdigital transducer to the curved surface and across the curved surface in a predetermined direction.

Abstract: A device is provided for damping hydrosound in liquid emitted from a sound-emitting body in the liquid. The device includes a plurality of envelope bodies distributed in the liquid in an area of the hydrosound-emitting body and at a distance from each other. A material, diameter and pressure of each envelope body is configured such that a natural frequency of the envelope body corresponds to an emitted frequency range of the hydrosound so as to dampen the hydrosound. The device also includes at least one mass body disposed in the liquid. The envelope bodies are connected to the mass bodies so as to prevent the envelope bodies from rising up in the liquid.