121results about "Diaphragm damping" patented technology

A sound control system includes a sound generating device disposed at a vehicle ceiling corresponding to a seat region of the vehicle and at a sound space formed within the vehicle to correspond to the seat region, and a sound processing circuit for providing a vibration driving signal to the sound generating device. The sound generating device vibrates an interior material of the vehicle ceiling based on the vibration driving signal.

An acoustic output apparatus is provided. The acoustic output apparatus may include a vibration assembly and a mass element. The vibration assembly may include a piezoelectric structure and a vibration element. The piezoelectric structure may be configured to convert an electrical signal into mechanical vibrations, and the vibration element may be connected to the piezoelectric structure at a first position of the piezoelectric structure and configured to receive the mechanical vibrations to generate an acoustic signal. The mass element may be connected to the piezoelectric structure at a second position of the piezoelectric structure.

A coaxial speaker includes a tweeter assembly, a woofer assembly, and a frame. The tweeter assembly is used to generate treble sound with a primary propagation direction along a first direction. The woofer assembly is used to generate bass sound with a primary propagation direction along the first direction. The woofer assembly includes a sound guide portion, which faces the tweeter assembly. The treble sound generated by the tweeter assembly, having a primary propagation direction along the first direction, is guided by the sound guide portion to propagate in a second direction. The tweeter assembly and woofer assembly are coaxially arranged, and the second direction is different from the first direction. The tweeter assembly and woofer assembly are mounted on the frame.

The present invention relates to an electronic device. A display device includes: a display module including a display panel configured to display an image; a rear cover located on a rear surface of the display module; and a sound generation module located at the rear cover and configured to vibrate the display module to generate sound, and a rear surface of the sound generation module is covered by the rear cover.

A system including: a first damper attached to a support frame; a drive component penetrates the support frame and the first damper; a diaphragm holder having a first frame part, a framework unit, and a fixing part connected to the first frame part by the framework unit; the diaphragm holder connected to the first damper; the fixing part is connected to one end of the drive component; a diaphragm assembly having a diaphragm unit and an annular diaphragm; a phase ball assembly attached to the side of the annular diaphragm closer to the diaphragm holder; a second damper sleeved on the outside of the diaphragm holder, the diaphragm assembly. the phase ball assembly, and the first damper: the side in the second damper facing the diaphragm holder is connected to the diaphragm holder and the side in the second damper facing the support frame is connected to the support frame.

The invention relates to an electrodynamic sound transducer comprising: - a converter basket (4, 15, 23) with at least one air passage (14), wherein the converter basket (4, 15, 23) is preferably formed as part of the supporting structure of the vehicle, - a flexible membrane (9), - a magnet system (1, 19) with a central and through opening (25); - a voice coil (2); - a central damper (17) which is arranged connectingly between the magnet system (4, 15, 23) and the membrane (9) and which is formed by an open structure; - additional damping (16) on partial surfaces of the underside of the membrane (9); - and optionally a support film (10, 18) on the top side of the membrane (9), which is covered on each side with adhesive layers of different thicknesses. Furthermore, the invention relates to a vehicle equipped with such an electrodynamic sound transducer.

The present invention provides a speaker that is capable of reducing a distortion component in generated sound. A speaker (1) is characterized by comprising: a vibration plate (11); a frame (13) that holds the outer edge of a vibration plate (11) from the back surface side which is opposite to the sound radiation side; a cover (14) that is disposed on the sound radiation side of the vibration plate (11) and that is fixed to the frame (13); and a protrusion (15) that protrudes from the cover (14) toward an outer region of a non-holding part (11b) excluding a holding portion (11a) which is held by the frame (13) in the vibration plate (11) and that interferes with the outer region of the non-holding portion (11b) from the sound radiation side.

The present application relates to a microphone and an electronic device having the same. The microphone can include a housing for receiving a sound signal, at least two transducers for generating an electrical signal in response to the sound signal, and a processing circuit for processing the electrical signal. Each of the at least two transducers can provide a unique formant to the microphone.

A coaxial loudspeaker comprises a tweeter assembly, a woofer assembly, and a frame. The tweeter assembly is used to produce high-frequency sound with a primary propagation direction along a first direction. The woofer assembly is used to produce bass sound with a primary propagation direction along the first direction. The woofer assembly includes a sound guide facing the tweeter assembly. The high-frequency sound produced by the tweeter assembly, which has a primary propagation direction along the first direction, is guided by the sound guide to propagate in a second direction. The tweeter and woofer assemblies are arranged coaxially, and the second direction of propagation differs from the first. The tweeter and woofer assemblies are mounted on the frame.

A loudspeaker transducer diaphragm or cone (e.g., 201, 301 or 401) is configured with arcuate protrusions that project distally from the main forward or distal surface 230 to provide stiffening and a break-up of resonant vibration modes when the loudspeaker is in use. The protrusions (e.g., 210, 310 or 410) are convex on one surface 230 and concave on the opposite surface 234, so their average thickness is similar to the frustoconical areas of the cone, i.e. they are shell-like in nature rather than solid mounds or walls. The protrusions 210 are generally curved as they run radially from the inner opening 204 to the outer peripheral edge to encourage modal break-up (suppressing strong vibrational modes, e.g., as in region 155).

The invention relates to an electrodynamic sound transducer with a transducer basket (21), a flexible diaphragm (2, 22, 39) and a magnet system (30, 31, 27) with an air gap, a voice coil (29) on a cylindrical coil carrier and a damping central element (28) which is connected to the diaphragm.The invention is characterized in that: - the coil former of the voice coil (29) is connected to the diaphragm (22) via a mounting adapter (24), - the diaphragm (22) is designed as a three-dimensional free-form surface with the exception of conical shapes, - the mounting adapter (24) is designed to be form-complementary to the coil former of the voice coil (29) on the voice coil side and form-complementary to the free-form surface of the diaphragm (22) on the diaphragm side, - the mounting adapter (24) is designed to be stepless between the coil former of the voice coil (29) and the diaphragm (22), - the pole plate (30) of the magnet system (30, 31, 27) is connected centrally and directly to the free-form surface of the diaphragm (22) via the central element (28), - and a damping layer (23) is arranged between the diaphragm (22) and the transducer basket (21) in the edge region.

An apparatus includes at least one actuator configured to generate vibrations over a range of vibration frequencies. The at least one actuator includes a housing configured to be positioned on or within a recipient's body. The actuator further includes a support portion configured to be in operative communication with a fixture implanted within the recipient's body. The actuator further includes an oscillator within the housing, the oscillator includes piezoelectric material and has a first portion in mechanical communication with the support portion and a second portion spaced from the support portion. The piezoelectric material is configured to undergo bending oscillations in response to received electric voltage signals in which the second portion moves relative to the first portion. The actuator further includes at least one damper configured to damp at least one vibrational resonance of the at least one actuator over at least a portion of the range of vibration frequencies and independently of spring damping by the piezoelectric material.

An electrodynamic sound transducer having a transducer basket, a flexible membrane and a magnetic system having an air gap, a voice coil on a cylindrical coil carrier and a dampening central element, which is connected to the membrane, includes a coil carrier of the voice coil is connected to the membrane by a mounting adapter. The membrane is configured as a three-dimensional free-form surface except for conical shapes.

A rubber sound film, and a sound production device and a use thereof. The rubber sound film contains 0.2-60% by mass of a distortion improver. The distortion improver is a block polymer, and an end group or at least one block component of the distortion improver comprises 0.02-25% by mass of a special chemical crosslinking site at which a chemical reaction can occur. The number average molecular weight of each block of the distortion improver is from 300 to 100,000. The distortion improver can be accurately prepared by means of living polymerization or the main body structure can be accurately prepared by means of living polymerization. The rubber sound film contains the distortion improver, and the structure and the content of the special chemical crosslinking site of the distortion improver are accurately controllable, so that the position, height, and width of a damping peak thereof are accurately controllable, and the damping characteristics of the obtained rubber sound film are accurately controllable. When the rubber sound film is applied to the sound production device, the distortion in a low-frequency band can be accurately reduced while good frequency response characteristics are maintained, and the rubber sound film has high controllability, stable performance, and extremely board application range.

Provided is a fabric which, when used as a fabric for adjusting the back pressure of a speaker, an earphone, or the like, effectively prevents leakage of sound to the outside and intrusion of external noise, and which has little variation in acoustic characteristics. A woven fabric comprising warp yarns and weft yarns, the woven fabric being characterized in that the air permeability resistance is 0.3 kPa.s / m or more and 5 kPa.s / m or less, and the tolerance of the air permeability resistance of the woven fabric is within + / -10%. Furthermore, the fabric is characterized in that at least one of the warp yarn and the weft yarn is a multifilament yarn. Furthermore, the woven fabric is characterized in that the multifilament yarn is an untwisted yarn which is not twisted.

To provide an apparatus capable of improving sound quality.SOLUTION: An apparatus includes a vibration member, a supporting member at a rear surface of the vibration member, and a sound generating apparatus at a rear surface of the supporting member. The sound generating apparatus is configured to output a first sound in a first direction and to output a second sound in a second direction different from the first direction.SELECTED DRAWING: Figure 1

The invention relates to the technical field of loudspeakers, in particular to an electrodynamic loudspeaker with a micro-electro-mechanical system (MEMS), the MEMS loudspeaker being assembled and structured by at least one liquid metal membrane, the apparatus comprising: a noise reduction module configured to reduce noise without a plurality of software interfaces; the static part comprises at least one silicon frame, and the silicon frame serves as a platform of a universal magnet; and the moving part comprises at least one liquid metal diaphragm, the liquid metal diaphragm is fixed at the top of the silicon frame, the liquid metal diaphragm is used as a constituent part of at least one microphone or loudspeaker, and the liquid metal diaphragm is made of gallium or indium alloy materials. According to the equipment, the original design is deeply changed in the aspects of material science, an electric power system and sound effect optimization, and quantum calculation, a liquid metal diaphragm, wireless electric power transmission and a nanometer manufacturing technology are fused. The sound quality, the energy efficiency and the customization capability are remarkably improved through the innovativeness.

The present invention relates to an electronic device. A display device comprises: a display module, the display module comprising a display panel configured to display an image; a rear cover, the rear cover being located on a rear surface of the display module; and a sound generating module, the sound generating module being located at the rear cover and configured to vibrate the display module to generate sound, and the rear surface of the sound generating module is covered by the rear cover.

A loudspeaker comprises a first diaphragm, a second passive diaphragm, and a drive unit coupled to the first diaphragm. The drive unit is configured to drive the first diaphragm in a direction of excursion upon applying electrical energy to the drive unit. The second passive diaphragm is arranged opposing the first diaphragm. The second passive diaphragm is mainly driven by sound waves emitted from the first diaphragm.

The present invention relates to an electronic device. A display device comprises: a display module, the display module comprising a display panel configured to display an image; a rear cover, the rear cover being located on a rear surface of the display module; and a sound generating module, the sound generating module being located at the rear cover and configured to vibrate the display module to generate sound, and the rear surface of the sound generating module is covered by the rear cover.

This acoustic device is provided with: a diaphragm that generates sound by vibrating; a frame that supports the diaphragm; and a stopper portion that is provided between the diaphragm and the frame and that, when the diaphragm is pressed toward the frame side, comes into abutment with a part of the diaphragm to suppress deformation of the diaphragm. When the diaphragm is pressed toward the frame side, the diaphragm and a stopper portion A abut on each other by line contact.

The present disclosure relates to a micro-electromechanical system (MEMS) device and a method of forming the same. The MEMS device includes a substrate, a cavity, an interconnection structure and a proof mass. The substrate includes a first surface and a second surface opposite to the first surface. The cavity is disposed in the substrate, extending between the first surface and the second surface. The interconnection structure is disposed on the first surface of the substrate, over the cavity. The proof mass is disposed in the cavity, connected to the interconnection structure, the proof mass having a thickness which is smaller than a thickness of the substrate.

The invention provides assemblies for production of sound using a plurality of configurations, including in one embodiment, surfaces that may be fixed or moveable relative to each other. These surfaces may be electromagnetic, electrostatic, piezoelectric, transducer implemented, thermally activated, permanently magnetized, or activated by any other arrangement, including but not limited to mechanical activation. The surfaces may in a variety of configurations be free floating, constrained, levitated or combinations thereof. The surfaces themselves may be foldable, rollable, expandable, specialized or any combinations thereof.

The present invention discloses a micro-electromechanical system (MEMS) loudspeaker, which includes a supporting structure, a diaphragm and a barrier plate. The supporting structure includes a supporting body and a sound hole penetrating from one end of the supporting body to the other end. The diaphragm is fixed on an inner circumferential side of the supporting body and located in the sound hole. The diaphragm is configured to vibrate and generate amplitude-modulated ultrasonic waves. The barrier plate is covered and fixed to one end of the supporting body. Due to the distance between the barrier plate and the diaphragm, the amplitude-modulated ultrasonic waves are demodulated to obtain modulated sound waves. Thereby improving the sound wave demodulation efficiency and amplitude of the MEMS loudspeaker and further improving the acoustic performance of the MEMS loudspeaker.

The embodiments of the present specification disclose a vibration sensing device, comprising: an acoustic transducer; a vibration assembly connected with the acoustic transducer, the vibration assembly is configured to transmit an external vibration signal to the acoustic transducer to generate an electrical signal, the vibration assembly comprises one or more groups of diaphragms and mass blocks, the mass blocks are physically connected to the diaphragms; the vibration assembly is configured to make the sensitivity of the vibration sensor greater than the sensitivity of the acoustic transducer within one or more target frequency bands.

The present invention relates to an electronic device. A display device includes: a display module including a display panel configured to display an image; a rear cover located on a rear surface of the display module; and a sound generating module located at the rear cover and configured to vibrate the display module to generate sound, with the rear surface of the sound generating module being covered by the rear cover.