91results 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.

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).

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.

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 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.

Provided is a woven fabric that effectively prevents sound leakage to the outside and intrusion of external noise and has little variation in the acoustic property when used as a woven fabric for adjusting the back pressure of a speaker, earphones, and the like. Provided is a woven fabric including a warp thread and a weft thread, the woven fabric having a airflow resistance of 0.3 kPa·s / m or more and 5 kPa·s / m or less, and the woven fabric having a tolerance of the airflow resistance within ±10%. In the woven fabric, at least one of the warp thread and the weft thread is a multifilament thread. In the woven fabric, the multifilament thread is a non-twisted thread without twists.

A vibration device can include a vibration generator including a vibration portion, in which the vibration portion includes a plurality of inorganic portions having piezoelectric characteristics, the plurality of inorganic portions being spaced apart from each other; and an organic portion disposed between at least two inorganic portions among the plurality of inorganic portions, the organic portion having non-piezoelectric characteristics. The organic portion includes a first organic portion and a second organic portion, the first organic portion being disposed between one of the plurality of inorganic portions and the second organic portion. Further, an elastic modulus of the first organic portion is lower than an elastic modulus of the second organic portion.

The invention relates to an electrodynamic sound transducer comprising: - a transducer basket (4, 15, 23) with at least one air passage (14), wherein the transducer 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 continuous opening (25); - a voice coil (2); - a central damper (17) arranged connectingly between the magnet system (4, 15, 23) and the membrane (9) and 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 upper side of the membrane (9), which is coated on each side with adhesive layers of varying thicknesses. The invention further relates to a vehicle equipped with such an electrodynamic sound transducer.

A speaker apparatus has a membrane, a frame coupled to the membrane, and an exciter coupled to the frame. The frame may act to distribute energy from the exciter across the membrane. The frame may have one or more struts, which may intersect with one another. The exciter may be coupled to the frame via a mount. The mount may have fingers configured to engage with the frame.

A loudspeaker includes: a diaphragm; a magnetic circuit; a frame that holds the magnetic circuit; an edge that is annular and connects the diaphragm and the frame; and a voice coil body that is disposed in a magnetic gap of the magnetic circuit. The diaphragm includes: a central portion; and an outer-circumferential portion that is provided as a single piece together with the central portion in an outer periphery of the central portion, and is bonded to the edge at a location in a vicinity of the central portion.

Rubber diaphragm, sound device and application thereof are provided, rubber diaphragm contains distortion improving agent with mass percentage of 0.2-60%; distortion improving agent is block polymer, and end group or block component of distortion improving agent includes special chemical crosslinking point with mass fraction of 0.02-25%; number average molecular weight of block of distortion improving agent is 300-100000; and distortion improving agent or main structure thereof is accurately prepared through living polymerization. Rubber diaphragm contains distortion improving agent, and structure and content of special chemical crosslinking point are accurately controllable, so that position, height and width of damping peak of rubber diaphragm are accurately controllable, and damping characteristics of rubber diaphragm are accurately controllable. When rubber diaphragm is applied to sound device, distortion (THD) of low-frequency band is accurately reduced while maintaining good frequency response characteristics, and ensuring high in controllability, stable in performance and wide in application.

The application discloses a vibrating diaphragm, a loudspeaker and an electronic device. The vibrating diaphragm comprises a plurality of diaphragm layers, the diaphragm layers are stacked, each diaphragm layer comprises a substrate and silica gel, the substrate is a porous structure, a first part of the silica gel is inlaid in the substrate, and the modulus of the silica gel is different from that of the substrate; at least one damping layer is arranged between any two adjacent diaphragm layers, and the damping layer is composed of a material with a pressure-sensitive damping function; and a second part of the silica gel covers one side of the substrate away from the damping layer.

To provide an electroacoustic transducer of which the diaphragm is hardly damaged and sensitivity of the electroacoustic transducer is hardly reduced even if downsized.SOLUTION: In an earphone 1, an electroacoustic transducer 2 comprises a housing 20, a partition member 30 disposed in the housing, a first electroacoustic transducing unit 100 and a second electroacoustic transducing unit 200. The electroacoustic transducing units include fixed electrodes 101 and 201, diaphragms 105 and 205 which are disposed oppositely to the fixed electrodes and vibrated in accordance with potential differences generated between the diaphragms and the fixed electrodes based on electric signals, and support members 107 and 207 which support partial regions of the diaphragms partially abut the diaphragms to the fixed electrodes. The first electroacoustic transducing unit and the second electroacoustic transducing unit are disposed while being opposed to each other with the partition member 30 interposed therebetween in such a manner that a sound discharge part 100a and a sound discharge part 200a communicate to an acoustic outlet 2a. The partition member 30 supports the support member 107 and the support member 207 in a recess 33.SELECTED DRAWING: Figure 3

To provide a sound apparatus which can enhance a sound characteristic and / or a sound pressure characteristic, and transportation equipment including such a sound apparatus.SOLUTION: A sound apparatus 30 according to one or more embodiments of the present specification includes: a sound generating module 330 including a vibration member 331 and a vibration apparatus 333 configured at the vibration member; an enclosure 310 connected to the vibration member with an internal space therebetween; and a connection member 380 connected to the enclosure. The connection member includes a first portion and a second portion having different thicknesses from each other. The second portion is a periphery portion of the enclosure, and a portion or region between an interior material 130 and the periphery portion of the enclosure. The first portion is the other portion, except the periphery portion, of the enclosure, and includes an opening hole 380o connected to the internal space 313 of the enclosure. The thickness T1+T2 of the second portion is thicker than the thickness T1 of the first portion.SELECTED DRAWING: Figure 43