Abstract: Engineered, pseudo-crystalline materials are formed of repeating arrays or lattices of similar basic elements. The materials are porous, so that a gas such as air can pass through the material. Audio waves propagating through the gas can also pass through the material, and these waves experience a passive, uneven, frequency-dependent modification as a result of passing through the material. The frequency response of this modification can be tuned by selecting the shape, size, and repetition patterns of the basic elements in the lattice, as well as the ingredients from which the pseudo-crystalline materials are made.

Abstract: A speaker includes: a frame, a vibration system, including a diaphragm and a voice coil driving the diaphragm to vibrate and emit sounds, and a magnetic circuit system fixed to the frame, including a lower plate, and a central magnetic portion and an auxiliary magnet fixed to the lower plate, the central magnetic portion spaced apart from the auxiliary magnet, the auxiliary magnet surrounding the central magnetic portion and forming a magnetic gap, the voice coil located in the magnetic gap, wherein the central magnetic portion includes a main magnetic portion and a reinforcing portion surrounding the main magnetic portion, a projection of the voice coil in a vibration direction of the diaphragm is at least partially located in the reinforcing portion. Compared with the related art, the speaker disclosed by the present disclosure could improve the BL value of the voice coil.

Abstract: A mobile terminal is provided, including a housing (21) and a speaker (10). The speaker (10) includes a box (11) and a sound generation unit (12). The box (11) includes a first cover body (117), a second cover body (118), and a cover plate (13). A first chamber is formed between the sounding unit (12) and the inner bottom wall of the first cover body, and a sound hole (113) is disposed in the first cavity (111). A second cavity (112) is formed between the sound generation unit (12) and the second cover body (118). The sound generation unit (12) includes a diaphragm (123). A resonant cavity (114) with a through hole (116) on one side is formed in the first cover body (117), the cover plate (13) covers the through hole (116), and a microhole (115) is disposed. Airflow enters the second cavity (112) through the microhole (115).

Abstract: A microphone assembly includes: a microphone with a first acoustic port, wherein the microphone is configured to convert acoustic waves into an electric signal; a filter housing with a second acoustic port; and a carrier coupled to the microphone and to the filter housing, wherein the carrier and the filter housing together enclose a cavity with a first acoustic passage fluidly connecting the first acoustic port and the second acoustic port; wherein the cavity comprises an acoustic chamber and a second acoustic passage; and wherein the second acoustic passage is in fluid communication with the first acoustic passage and with the acoustic chamber, and wherein the acoustic chamber and the second acoustic passage together establish a Helmholtz resonator for suppressing acoustic energy within a first frequency band in the acoustic waves propagating through the first acoustic passage, wherein the first frequency band is in an ultrasound frequency domain.

Abstract: An open audio device including an acoustic radiator that emits front-side acoustic radiation from its front side, and emits rear-side acoustic radiation from its rear side. A front acoustic cavity receives front-side acoustic radiation and comprises at least one front sound-emitting opening, and a rear acoustic cavity receives rear-side acoustic radiation and comprises at least one rear sound-emitting opening. The front and rear acoustic cavities each have a fundamental frequency. The fundamental frequencies are within one octave of each other.

Abstract: A headphone includes a speaker unit, a baffle plate, an ear pad, and a grille. The baffle plate is configured to support the speaker unit. The ear pad is configured to surround an acoustic space in which a sound emitted from the speaker unit is transmitted toward an ear of a listener. The grille is configured to cover the speaker unit. The grille has a hole and a cavity connected to the hole.

Abstract: Aspects of the subject technology relate to electronic devices having speakers with resonators, such as Helmholtz resonators, acoustically coupled to the front volume of the speaker. A speaker module for an electronic device may include multiple resonators, including a first resonator that is acoustically separate from, and at least partially disposed within a second resonator. An acoustic barrier between the first resonator and the second resonator may have a liquid resistance that is different from a liquid resistance that is provided between the first resonator and a back volume of the speaker module and/or between an external environment of the speaker. In one or more implementations, a third resonator may be provided, that is spatially separated from first and second nested and/or adjacent resonators.

Abstract: The present disclosure relates to a waterproof open earphone. The waterproof open earphone may include a housing, at least one button, at least one elastic pad, and at least one pair of speaker units. The housing may be placed on a head or at least one ear of a user while not blocking an ear canal of the user. The at least one button may be set on the housing, wherein each of the at least one button corresponds to a button hole. The at least one elastic pad may correspond to the at least one button, respectively, wherein each elastic pad prevents the corresponding button from moving relative to the button hole. Each pair of the at least one pair of speaker units may generate sound within a frequency range from two sound guiding holes through two sound guiding tubes.

Abstract: A multilayer panel speaker includes a yoke having a bottom portion and a side portion, a first vibration panel fixed to the bottom portion and supported by a frame, and a second vibration panel fixed to the side portion. By using a multilayer panel, it is possible to improve high frequency and low frequency sensitivity in the multilayer panel speaker.

Abstract: In one aspect, a low frequency driver is provided having a diaphragm operable to produce sound, a front volume, and an outlet that receives sound from the front volume and directs sound out from the low frequency driver. The low frequency driver further includes a low-pass filter chamber in communication with the front volume.

Abstract: An electronic apparatus may include a loudspeaker that includes an enclosure; a first driver disposed in the enclosure and configured to output a sound based on an input audio signal; a unit accommodator having a hole in which the first driver is disposed, and extending toward an inside of the enclosure; a space forming portion extended from an outer edge of the unit accommodator, surrounding a back of the first driver to form a space with the unit accommodator, and spaced apart from an inner edge of the unit accommodator; a slot forming portion extending from the space forming portion, and having an inner surface spaced apart from an outer surface of the unit accommodator to form a first sound output passage; and a sound absorber disposed at at least one of the outer surface of the unit accommodator and the inner surface of the slot forming portion.

Abstract: A sound output device includes: a speaker unit that has a sound emitting portion; an attaching member by which the speaker unit is attached to an object; a separating member that is provided between the speaker unit and the attaching member to separate the speaker unit from the attaching member; and a sealing member that is provided between the speaker unit and the attaching member to reduce a sound that is emitted from a side of the speaker unit opposite to the sound emitting portion and is transmitted to a sound emitting portion side. The attaching member has a first portion on a side of the sound emitting portion of the speaker unit, and the first portion of the attaching member has an opening that corresponds to the sound emitting portion.

Abstract: The present invention refers to a loudspeaker, in especially to a bass reflex tube for a loudspeaker. Commonly, said loudspeakers include at least one woofer driver, by which an electric audio signal is transduced via a voice coil and a diaphragm into soundwaves of medium to low frequency. A bass reflex tube for a loudspeaker should be provided, which enables said loudspeaker to produce an acoustic signal according to an electrical signal, wherein the acoustic signal shows optimized an improved quality characteristics, in especially with regards to quality and accuracy of the conversion of electrical signal into the acoustic signal. The problem mentioned above is solved by a bass reflex tube for a loudspeaker, wherein said bass reflex tube is at least partially made of a ceramic material. Further, the bass reflex tube comprises a tubular portion, which is extending in an axial direction of a longitudinal axis of the bass reflex tube.

Abstract: A passive sound absorber includes a cavity opening to the outside via an input direction to form a Helmholtz resonator for a first frequency. The absorber further includes at least one moving element, or wafer, suspended or held by suspensions in a position obstructing the neck in a non-sealed manner. The relative stiffness of the suspensions and the wafer is determined so that the assembly resonates in a vibration in a “piston” movement at a second frequency different from the first frequency, achieving absorption for this second frequency or frequency range. A hybrid version includes a coil that is controlled to adjust the acoustic impedance of the absorber. An acoustic wall includes a plurality of such absorbers produced by a repetitive structure opening through perforations, each receiving such a wafer, and a method of designing and manufacturing such an absorber or wall is also provided.

Abstract: The disclosed technology includes a transducer assembly having a first transducer element. The transducer assembly includes a first filter element adjacent to least of portion of the first transducer element such that a first cavity is defined between the first filter element and the first transducer element. The first filter element includes a plurality of machined passageways in communication with the first cavity. The transducer assembly also includes an inlet passage having a first end in communication with a first external portion of the transducer assembly and a second end in communication with the plurality of machined passageways.

Abstract: A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is formed on at least one of surfaces of the base layer. The coating layer is composed of chitin nanofibers each having a higher elastic modulus than that of the base layer.

Abstract: The invention relates to a loudspeaker which includes one or more drivers, a front panel and a further panel extending rearwardly therefrom. The rearwardly extending panel is typically offset towards one side of the front panel and includes an outer edge with at least portion which is curved. The provision of the arrangement of the said panels provides significant improvement in terms of the sound quality which can be achieved from the loudspeaker.

Abstract: One embodiment of the invention discloses an acoustic device having a housing and a speaker unit accommodated in the housing. The speaker unit forms a front volume and a back volume together with the housing. The housing includes an extra volume communicating with the back volume and a sound channel communicated with the front volume. The extra volume is isolated from the sound channel. The invention provides an acoustic device with enlarged back volume for improving low frequency sound quality.

Abstract: The present invention provides a novel drive unit mounting arrangement, in which a drive unit having a chassis is mounted to a cabinet from at least two sides. The arrangement comprises a member for securing the drive unit to the cabinet from mounting points of the chassis. The arrangement further comprises a suspension member between the mounting points of the chassis and the cabinet such as to suspend the drive unit chassis elastically to the cabinet for allowing suspension in both forward and rearward directions.

Abstract: Apparatus, systems and methods for providing a speaker with a backvolume that can be used in a portable electronic device are disclosed. The backvolume can be arranged to fit into a small, irregularly shaped space, thereby efficiently utilizing available space. In one embodiment, the backvolume can have a reduced wall thickness.

Abstract: A directional sound generating apparatus and a directional speaker array including the same are disclosed. The directional sound generating apparatus includes a sound transducer, a reflection plate which is located behind the sound transducer, and a blocking plate which is provided between a front portion and a back portion of the sound transducer.

Abstract: The present invention provides an improved speaker structure, which includes a speaker body, a resonance body and at least one sound guiding portion. The resonance body includes a resonance film and a resonance film frame. The sound guiding portion includes a first sound guiding member, a second sound guiding member and a back frame unit. The speaker structure forms a sealed sound chamber by combining the speaker body, the resonance body and the at least one sound guiding portion. When the speaker body generates a front sound wave and a guiding sound wave, the front sound wave is transmitted within the sound chamber to the resonance film to enhance low frequency sound effect, and the guiding sound wave is transmitted within the resonance cavity and forms a back sound wave, thus reducing noise in the sound region and enabling better extension of the sound wave towards low frequency range.

Abstract: A sealed speaker system includes an enclosure and a transducer diaphragm mounted within the enclosure, where an increase in air pressure within the enclosure results in an outward movement of the diaphragm toward an exterior of the enclosure, and a decrease in air pressure within the enclosure results in an inward movement of the diaphragm toward an interior of the enclosure. A pressure vent is provided in the enclosure and allows a gradual transfer of air between the enclosure interior and the enclosure exterior to substantially maintain a pressure equilibrium between the enclosure interior and the enclosure exterior.

Abstract: A sound generating apparatus is provided for expanding a mid-range of a slit-firing type speaker system. The sound generating apparatus includes a vibrator, a body part which encloses the vibrator, a path through which the generated sound is transmitted, and a slit formed in a length direction of the body part connected to an end portion of the path and configured to emit the sound.

Abstract: An audio emitter comprises a support member operable to support a sound emittive material and a sound emittive material carried by the support member. A protective screen has a plurality of apertures formed therein, the protective screen being spaced a predetermined distance from the sound emittive material, said predetermined distance being a function of a resonant frequency of the audio emitter.

Abstract: The dual resonator chamber with variable volume includes first and second housings. The second housing is slidably mounted within the first housing such that a second inner neck portion of the second housing is slidably mounted about the first inner neck portion of the first housing and forms a fluid-tight seal therewith. A sliding wall is slidably mounted within the second housing, dividing the interior thereof into upper and lower resonator chambers. At least one first actuator selectively adjusts the height of the sliding wall with respect to the second lower end of the second housing to selectively adjust volumes of the upper and lower resonator chambers. At least one second actuator selectively adjusts the height of the second housing with respect to the first housing to selectively adjust the neck length of the lower resonator chamber.

Abstract: A loudspeaker unit comprising a loudspeaker housing and a first and a second loudspeaker, wherein the two loudspeakers are both placed in a flat front wall of the loudspeaker housing, the rear side of the first loudspeaker adjoins a first space in the loudspeaker box and the rear side of the second loudspeaker adjoins a second space in the loudspeaker box, and the first and the second space in the loudspeaker box are separated by a wedge-shaped body, the base of which is connected to a wall placed opposite the front wall and the intersection between the sloping surfaces of which is located in the vicinity of the front wall, wherein the wedge has a length in the direction transversely of the plane of the front wall that is at least twice the distance between the sloping surfaces at the position of the base of the wedge-shaped body.

Abstract: A cone speaker that outputs audio by transmitting to a truncated cone, the movements of a voice coil driven when an audio current is transmitted through a voice coil placed inside a magnetic circuit formed in a space that surrounds a pole piece. Inside a space between the back surface of a center cap attached to a central portion of the cone and the apical surface of the pole piece that faces the center cap, a first filling material composed of a flexible porous body with a low porosity fills the periphery of the space and a second filling material composed of a flexible porous body with a higher porosity than the first filling material fills the central portion thereof.

Abstract: One embodiment of the invention discloses a speaker box having a housing and a speaker accommodated in the housing. The speaker includes a sound radiation surface for generating sound. The housing includes a first and second output ports disposed at one side of the housing for transmitting the sound to outside of the speaker box. The housing includes a plurality of ribs disposed therein and forming a bending channel. The first and second output ports are disposed at two ends of the bending channel. The bending channel is divided into a front channel and a back channel by the speaker. The speaker box is capable of obtaining a better low frequency sound reproduction quality.

Abstract: Method, user terminal and computer program product for controlling audio signals at the user device during a communication session between the user device and a remote node, in which a primary audio signal is received at audio input means of the user device for transmission to the remote node in the communication session. It is determined whether the user device is operating in (i) a first mode in which secondary audio signals output from the user device are likely to disturb the primary audio signal received at the audio input means, or (ii) a second mode in which secondary audio signals output from the user device are not likely to disturb the primary audio signal received at the audio input means.

Abstract: The inventive subject matter provides a reflex tube or port that includes a circuit board and a speaker enclosure that incorporates such a reflex tube. The circuit board is mounted about the reflex tube and can be configured so as to form a resonance chamber with an interior wall of a speaker enclosure to form a resonance chamber.

Abstract: A loudspeaker assembly is disclosed for use in a loudspeaker system having infinite baffle topology. The assembly comprises a driver including a cone and a basket and at least one Helmholtz resonator including a chamber and a vent duct communicating with the chamber and adapted to pass through the infinite baffle. The chamber is dimensioned to provide a tuned frequency well above an operating band associated with the driver. The cross sectional area and length of the vent duct may be set to provide control over duct air noise and low frequency extension. A method of tuning a loudspeaker assembly for use in a loudspeaker system having infinite baffle topology is also disclosed.

Abstract: In a low frequency transducer system a multi-compression chamber, an inverse horn structure is employed in combination with a resonance-distortion filter chamber. The filter chamber effectively expands the effective enclosure volume at low frequencies and connected to one of the compression chambers filter parasitic resonances and distortion and allowing the system to more efficiently reproduce low frequencies while being able to use smaller diameter transducers and maintaining good system sensitivity. Compression chambers are organized for constant or continuous compression on a section-by-section basis throughout the inverse horn system.

Abstract: An apparatus comprises: a transducer configured to generate sound; and a housing defining a first cavity and a second cavity, the first cavity and the second cavity being connected to the transducer; wherein the first cavity comprises a first sound outlet at a first surface of the housing; and the second cavity comprises a second sound outlet at the first surface of the housing and a third sound outlet at a second surface of the housing wherein the first and second cavities and the first and second sound outlets are configured to limit a sound pressure level of the generated sound at the first and second outlets at one or more frequencies.

Abstract: A system providing a resonator for a transducer of an electronic device is provided. The system comprises a housing defining: a first enclosure having a first opening to house a back end of the transducer and a second opening; a port connected to the first enclosure through the second opening of the first enclosure, the port having a first end, a second end, an interior channel and a second opening in the second end; a second enclosure to cover a front portion of the speaker; and at least one aperture defined in the second enclosure to allow air outside of the electronic device to be in communication with the front of the transducer. When the transducer is mounted into the first enclosure, a first volume between the transducer and the first enclosure is formed which is in communication with air surrounding the second end of the port.

Abstract: A duct design and methods for designing ducts are described herein. The duct has a profile described by an equation that balances momentum of the fluid flowing through the duct with an adverse pressure gradient. The duct profile is configured to: (i) maintain the fluid's momentum to be greater than the adverse pressure gradient present at any location within the duct, such that no boundary layer separation occurs; and (ii) achieve a fluid exit momentum of approximately zero.

Abstract: A suspension for a hearing device having a receiver includes a first part, a second part, and a vibration isolator positioned between the first and the second parts, and mechanically coupled to the first and second parts, wherein the first part is configured to at least partly enclose the receiver, wherein the second part is configured to at least partly enclose a sound outlet of the hearing device, wherein the vibration isolator comprises an acoustic passage part and a damping part enclosing the acoustic passage, wherein the acoustic passage part provides an acoustic passage between the first and second parts, wherein the damping part of the vibration isolator is asymmetrical along a longitudinal, a transverse axis, or both the longitudinal axis and the transverse axis, of the vibration isolator, and wherein the vibration isolator is freely suspended between the first and second parts.

Abstract: A speaker apparatus for producing sound comprising of a housing, a plurality of covers, a speaker driver, a radiator, a resonator and a resonator stand which in combination provide an enhanced low frequency sound output.

Abstract: One embodiment of the invention discloses a speaker box having a housing and a speaker accommodated in the housing. The speaker includes a sound radiation surface for generating sound. The housing includes a first and second output ports disposed at one side of the housing for transmitting the sound to outside of the speaker box. The housing includes a plurality of ribs disposed therein and forming a bending channel. The first and second output ports are disposed at two ends of the bending channel. The bending channel is divided into a front channel and a back channel by the speaker. The speaker box is capable of obtaining a better low frequency sound reproduction quality.

Abstract: Apparatus for compensating for pressure changes in an acoustic transducer system includes a skeleton member having a predetermined configuration and adsorbent material having a regular structure and being supported on the skeleton member. The apparatus may include a plurality of members, each of the plurality of members having a plurality of hollows formed therein, at least one main surface of each of the plurality of members substantially facing and spaced apart from a main surface of an adjacent one of the plurality of members, and the adsorbent material may be provided within each of the plurality of hollows.

Abstract: A film-type audio output apparatus includes an audio output device, at least one speaker unit, and at least one film. The at least one speaker unit is positioned at any side of the audio output device. The speaker unit can be an embedded speaker unit. The at least one film can be positioned at any or more places of an inner side and an outer side of the audio output device. When the speaker unit of the audio output device releases sound, the film positioned on the audio output device can get vibration of the sound so that the inside of the audio output device can generate resonance. Thus, the audio output apparatus can generate softer undertone and wider diapason.

Abstract: An electronic device as provided here includes a primary housing, an acoustic transducer, a lower layer of acoustic mesh material, and an upper layer of acoustic mesh material. An interior volume is defined within the primary housing. The primary housing includes an interior mounting surface, an exterior mounting surface, and an acoustic port. The transducer is located within the interior volume, and the lower layer of mesh material is coupled between the interior mounting surface and the transducer to cover a lower opening of the acoustic port. The upper layer of mesh material covers an upper opening of the acoustic port. Each layer of mesh material provides an amount of acoustic transparency and an amount of visual obscurity such that the transducer is effectively hidden from view without adversely impacting the audio performance characteristics of the transducer.

Abstract: Systems, methods, and devices for improving speaker performance with an acoustic damped port are disclosed. In accordance with various embodiments of the present invention, a damping material is placed around a vented frame of a speaker driver, and substantially covers or fills the vents of the frame. In some embodiments, the damping material results in improved impedance matching with acoustic delay, without required dimensional tuning (as with conventional ports). In some embodiments, it also reduces the air velocity gradients minimizing higher order frequency distortion components. In some embodiments, the damping material also acts as an absorber of energy by coupling to the sound wave. In some embodiments, low-frequency performance is improved in a small-scale design.

Abstract: A speaker with vibration absorbing function is disclosed in the present invention. The speaker is disposed on a boss of a casing. The speaker includes a sound box, and a supporting arm disposed on a lateral surface of the sound box. The supporting arm includes a bending portion. An end of the bending portion is connected to the sound box. The supporting arm further includes a hooking portion disposed on the other end of the bending portion for hooking the boss of the casing. Vibration generated from the sound box can decay by the bending portion, and is not transmitted to the boss via the hooking portion.

Abstract: Provided is a technique for improving frequency characteristics by an acoustics-related method so that a sound is heard with natural frequency characteristics when a sound-isolating earphone is fitted in a human ear. A sound-isolating earphone is provided with two or more electroacoustic transducers, wherein independently generated sound waves are passed through isolated sound leading pipes and are mixed just before an entrance of an external auditory canal, and a sound wave of which is twice the difference between path lengths of the two sound leading pipes is attenuated. This serves to provide an easy-to-hear improved sound quality by suppressing the sound wave at around 6 kHz that is transmitted with characteristically high intensity in a sound-isolating earphone.

Abstract: Disclosed is a speaker system. The speaker system includes a multimedia unit including a plurality of speaker units, a resonance medium for supporting the multimedia unit, a number of low frequency vibrators assembled with the multimedia unit and located between the multimedia unit and the resonance medium, a driving unit for providing high frequency audio signals to the speaker units and low frequency audio signals to the low frequency vibrators. A resonance member is formed by the low frequency vibrators and the resonance medium for producing low frequency sound.

Abstract: An acoustic system includes a receiver or microphone, a tube, a barrier, and an equalization device. The receiver is capable of outputting an audio signal. The tube is in connection with the receiver and the audio signal travels along a length of the tube. The barrier is fitted along the tube and the barrier prevents moisture from passing along the tube toward the receiver. The barrier causes an amount of damping to the audio signal. The equalization device is in connection with the receiver and the equalization device counteracts the damping by the barrier. The barrier is configured to have a submersion rating greater than or equal to 7 IP.

Abstract: A loudspeaker comprising a housing and a membrane mounted in said housing, which membrane can be set vibrating so as to produce sound, wherein the loudspeaker has at least one sound channel which extends between the membrane and the outer side of the housing, and wherein one or more local sound barriers are provided in the sound channel, which sound barriers locally block at least 15% of the cross-sectional area of the sound channel, such that amplification of the sound pressure occurs in the audible frequency range due to resonance.

Abstract: Systems, methods, and devices for providing high quality speaker performance in a small-scale design are disclosed. In accordance with various embodiments of the present invention, a small-scale speaker assembly is provided which is capable of delivering high-fidelity wideband audio. The speaker assembly includes a speaker driver and a number of electronic components within an enclosure. In some embodiments at least one microphone is included in the assembly. In some embodiments the speaker assembly is well suited for audio conferencing. In some embodiments low-frequency performance is improved in a small-scale design.

Abstract: A duct design and methods for designing ducts are described herein. The duct has a profile described by an equation that balances momentum of the fluid flowing through the duct with an adverse pressure gradient. The duct profile is configured to: (i) maintain the fluid's momentum to be greater than the adverse pressure gradient present at any location within the duct, such that no boundary layer separation occurs; and (ii) achieve a fluid exit momentum of approximately zero.