Abstract: Disclosed are a surface sound-emitting apparatus and an electronic device. The surface sound-emitting apparatus comprises an exciter, a vibrating part and a connection element, wherein the connection element is of a sheet-like structure, the vibrating part is disposed on the connection element, the exciter is disposed on the vibrating part, an edge of the connection element is configured to connect to the remaining portion of a surface of an electronic device, the connection element and the remaining portion of the surface together constitute the surface, the connection element is configured to provide an elastic recovery force, and the exciter is configured to provide a driving force.

Abstract: A speaker transducer, comprising a speaker membrane and two drive members connected to an outer membrane circumference of the speaker membrane for driving the speaker membrane. A substantially rigid support member is connected to each of the two drive members and extends there between, wherein the support member is connected to and extends along the speaker membrane.

Abstract: A vibration apparatus comprises a lower vibration structure, an upper vibration structure on the lower vibration structure, and an adhesive member between the lower vibration structure and the upper vibration structure. The lower vibration structure and the upper vibration structure are configured to generate sound waves having different frequencies.

Abstract: A multi-modal interactive apparatus provides for output and input using a plurality of modalities. A display presents image output and speakers provide audio output. A sensor module includes sensors such as a microphone array, camera, radar, ambient light sensor, and so forth. Based on how the apparatus is mounted to a supporting structure, in one implementation the overall orientation of the apparatus may be arranged to provide a desired field-of-view (FOV) to the sensors. For example, based on mounting height, the orientation places the sensor module on a top or bottom of the mounted device. Within the sensor module, one or more sensors may be mounted with a pitch angle that directs the FOV to encompass users during typical operation. In another implementation, the sensor module may be repositioned with respect to the apparatus to provide the desired FOV, such as moved from top to bottom.

Abstract: An electronic device is provided. The electronic device includes a housing, a display that is visually exposed through one surface of the housing and that includes a display panel including a pixel array and a layer group including a plurality of layers stacked on the display panel, a printed circuit board disposed in the housing, a piezo unit attached to a rear surface of the display panel, and a flexible printed circuit board (FPCB) that is connected to the piezo unit and that extends to the printed circuit board, the flexible printed circuit board including a coil that surrounds at least part of the piezo unit.

Abstract: The present application provides a method of manufacturing a resonant panel (200) of a flat panel loudspeaker. The method comprises: pressing a resonant panel blank between a first pressing surface (302) and a second pressing surface of a press, whereby to form the resonant panel (200) of the flat panel loudspeaker. The second pressing surface substantially opposes the first pressing surface (302). The first pressing surface (302) comprises at least one tool relief region (306, 312, 314, 316, 318), whereby to form at least one corresponding respective panel relief region (206, 212, 214, 216, 218) in a surface of the resonant panel (200).

Abstract: An interior component of a vehicle comprises a carrier having a front face directed toward a passenger compartment of the vehicle and an opposite rear face; a speaker including an at least partially transparent diaphragm and a transducer coupled to the diaphragm. Movement of the transducer causes vibration of the diaphragm to generate sound by vibration of the diaphragm, the diaphragm having a front face directed towards the passenger compartment and an opposite rear face. The carrier provides a support along at least part of the periphery of the diaphragm where the diaphragm is attached to the carrier where the front face and the rear face of the diaphragm are free of the carrier across a part of the diaphragm surface so that the diaphragm is suspended in the carrier of the interior component.

Abstract: The invention relates to audio transducers, such as loudspeaker, microphones and the like, and includes improvements in or relating to: audio transducer diaphragm structures and assemblies, audio transducer mounting systems; audio transducer diaphragm suspension systems, personal audio devices incorporating the same and any combination thereof. The embodiments of the invention include linear action and rotational action transducers. For both types of transducer, rigid and composite diaphragm constructions and unsupported diaphragm periphery designs are described. Systems and methods for mounting the transducer to a housing, such as an enclosure or baffle are also described. Furthermore, hinge systems including: rigid contact hinge systems and flexible hinge systems are also disclosed for various rotational action transducer embodiments.

Abstract: An audio device includes an electroacoustic convertor and a differential amplifier. The electroacoustic convertor has a first output terminal and a second output terminal. A first polarity of a first capacitance variation corresponding to the first output terminal is opposite to a second polarity of a second capacitance variation corresponding to the second output terminal. The first capacitance variation and the second capacitance variation are associated with a magnitude of acoustic pressure. The differential amplifier has a first input terminal coupled to the first output terminal and a second input terminal coupled to the second output terminal.

Abstract: The present invention relates to a voice coil plate having a multi-patterned coil for a slim speaker, the voice coil plate enabling weight reduction, impedance value reduction and inductance value enhancement; and a slim flat speaker enabling weight reduction, impedance value reduction and inductance value enhancement. In one embodiment, the voice coil plate comprises: a base substrate; and a voice coil formed on one surface of the base substrate comprising: a first pattern part arranged along a first direction; and a second pattern part arranged along a second direction different from the first direction. The first pattern part comprises a plurality of first patterns spaced apart at predetermined intervals, and the second pattern part comprises a plurality of second patterns spaced apart at predetermined intervals. At least two of the second patterns, among the plurality of second patterns, are connected in parallel to one of the first patterns.

Abstract: Embodiments are disclosed of a speaker capable of producing multi-frequency-range sound using bar magnets, multiple diaphragms, and a shared planar voice coil. The planar voice coil is located between the bar magnets and translates a received electric signal into the kinetic energy that vibrates the diaphragms, thus reproducing multi-frequency range sound. In some embodiments, the speaker generates bi-directional sound.

Abstract: A flat panel speaker according to an embodiment of the disclosure includes a flat panel and a plurality of vibrators that are disposed on a back surface of the flat panel. The plurality of vibrators are disposed to avoid a location that most easily vibrates in an entire range of audio frequencies when vibration is generated in the flat panel by the plurality of vibrators. A large stationary wave with respect to the flat panel therefore does not easily occur.

Abstract: A display device including a display panel including a plurality of light emitting elements, a first substrate including a planar coil, and disposed under the display panel, a second substrate including a magnet spaced apart from the planar coil by a predetermined distance, and disposed under the display panel, and a power supply unit configured to supply alternating current power to the planar coil. The display device generates sound using an induced magnetic field generated by the planar coil and a magnetic field generated by the magnet.

Abstract: A display device includes a display panel, a vibration sound device disposed below the display panel, a lower panel sheet disposed adjacent to the vibration sound device below the display panel and including a functional layer and a bottom coupling layer disposed on a lower surface of the functional layer, and a bracket disposed below the vibration sound device and the lower panel sheet and coupled with the bottom coupling layer, wherein the bottom coupling layer partially exposes the lower surface of the functional layer, a separation space is defined between the bracket and the lower surface of the functional layer where the bottom coupling layer is exposed, and the separation space is partially connected with the vibration sound device.

Abstract: A suspension component may be used within a system for isolating vibrations produced by an electrical component. A body of the suspension component may be formed from a single piece of planar material. A suspension component includes a plurality of flexures. The plurality of flexures includes a first set of flexures configured to suspend a first sub-assembly of a transducer from support brackets, a second set of flexures configured to suspend a second sub-assembly of the transducer from the first sub-assembly, and a third set of flexures configured to suspend the second sub-assembly from the support brackets.

Abstract: Described herein are devices that combine aspects of storage containers and audio housing devices. These devices can be installed into a vehicle and function as a speaker box for the vehicle's sound system as well as a vehicle's glove box. In some embodiments, devices incorporating features of the present invention include a body that is configured to define a first internal space configured to house one or more audio devices. The body is further configured to define a second internal space configured as a storage container. In some embodiments, the first and second internal spaces are separated by at least one common wall. In some embodiments, the second internal space is at least partially surrounded by the first internal space. In some embodiments, the devices can further comprise one or more speaker driver openings to facilitate sound emission from the devices.

Abstract: A method includes determining, for a piezoelectric cantilever-type transducer of a distributed mode loudspeaker adapted to cause vibration of a load, a subset of frequencies from a range of frequencies at which to output vibrations, in which the transducer includes two or more electrode pairs positioned along a length of the transducer and each electrode pair including a first electrode on a first side of a piezoelectric layer of the transducer and a second electrode on a second side of the piezoelectric layer of the transducer that is opposite to the first side; selecting, for the subset of frequencies, a respective input voltage for each of the two or more electrode pairs based on a relative position of each pair on the transducer; and applying the respective input voltage to each of the two or more electrode pairs to cause the transducer to generate a vibrational force.

Abstract: This invention is a loudspeaker driver/exciter assembly for use with a flat or slightly contoured surface panel to produce an audible sound. The invention is composed of a driver assembly, a frame, and a voice coil exciter assembly. The driver assembly includes magnet, core cap, and shell pot. The voice coil exciter assembly includes a former, coil and exciter assembly. A spider suspends the voice coil exciter assembly in relation to the driver assembly. The invention is mounted to the panel by one or more interfaces between the frame and the panel and one or more interfaces between the voice coil exciter assembly and the panel. One or more holes or apertures are provided in the shell pot, core cap, and magnet, and aligned with the screws or fasteners of the voice coil exciter assembly in such a way that a tool such as a screwdriver may be used to facilitate quick and easy mounting and removal of the driver/exciter assembly with the panel.

Abstract: A method for generating sound by one or more sound panels in a vehicle, and a sound system are provided. The method includes receiving, by an acoustic exciter coupled to one of the one or more sound panels, a first audio signal. The first audio signal includes a first frequency range. Each of the sound panels is formed of a material having a respective flexural modulus. The method further includes generating, by each of the sound panels, a sound signal comprising a respective range of sound pressure vibrations dependent on the flexural modulus of the sound panel, variations of dimensions of the sound panel, and the first audio signal received by the acoustic exciter.

Abstract: Disclosed is a structure for detecting the vibration displacement of a speaker, including: a vibration system having a movable pole plate; a magnetic circuit system; and a fixed pole plate provided under the vibration system and opposite to the movable pole plate, the movable pole plate and the fixed pole plate constituting a capacitor. Also disclosed is an acoustoelectric inter-conversion dual-effect device, further including an impedance transformer connected to the capacitor and including a field effect transistor and a diode. In the present invention, a movable pole plate of a capacitor is provided on a vibration system and a fixed pole plate is provided under the vibration system and fixed in position. When the vibration system vibrates, the change in capacitance is detected to calculate the actual displacement of the vibration system, which can reduce the power of the speaker device when the actual displacement of the vibration system exceeds a safety threshold.

Abstract: A speaker assembly includes a support structure and a tactile vibrator coupled to the support structure. The tactile vibrator includes a plurality of rigid members coupled to a plurality of suspension members. Each rigid member of the plurality of rigid members has at least one magnetic member coupled thereto for generating tactile vibrations during operation of the speaker assembly. A headphone includes the speaker assembly. A method of operating a speaker assembly includes driving a tactile vibrator having a plurality of magnetic members coupled to a plurality of rigid members and a plurality of suspension members to cause tactile vibrations in the speaker assembly.

Abstract: A vehicle sound system and method of generating sound having a plurality of frequency responses are provided. The vehicle sound system includes one or more acoustic panel assemblies. Each of the one or more acoustic panel assemblies includes a sound panel formed of a material having a respective flexural modulus and an acoustic exciter coupled to each of the one or more sound panels. Each acoustic exciter is configured to receive a first audio signal containing a first frequency range. Each of the one or more sound panels is configured to generate a sound signal containing a respective range of sound pressure vibrations dependent on the flexural modulus of a material the sound panel is formed of, variations of dimensions of the sound panel, and the first audio signal received by the acoustic exciter coupled to the sound panel.

Abstract: A speaker comprising: a case; a display configured to display an image; at least one vibrating element configured to actuate the display to move the display relative to the case to generate acoustic waves; a gasket interfacing the case and the display; and a transceiver located within a speaker internal volume.

Abstract: An audio apparatus is provided. The audio apparatus includes an input configured to receive an audio signal containing noise; a period estimation unit configured to estimate a period of a noise pattern in the audio signal; a noise reducer configured to subtract and remove the noise pattern from the audio signal in a frequency domain by using the estimated period of the noise pattern; a noise updater configured to update the noise pattern according to a change in amplitude of the noise; and an output configured to output the audio signal obtained by removing the noise pattern.

Abstract: The present disclosure relates to a display device for generating sound by directly vibrating a display panel thereof, which includes a display panel connected to a surface of the display panel and configured to display an image; and a sound generating actuator, which is fixed to a support structure of the display panel and attached to the display panel to directly vibrate the display panel. In the display device, the progressing direction of the sound coincides with the image output direction in the display device. Therefore, sound localization or sound output characteristics of the display device or set apparatus can be improved, and a separate speaker is not required, the mechanism of the set apparatus can be easily designed, and a thickness thereof can be easily reduced.

Abstract: An electronic device is provided. An electronic device includes a window formed with a transparent or semi-transparent material at an outside of the electronic device, a display disposed on or over the window and having a second side substantially vertical to a first side, and first and second members to absorb or block moisture inflowing from the outside. The window includes a first area corresponding to the display and a second area corresponding to the outside of the display, the first member is disposed on a part of the second area, the second member is disposed on a part of the first member and on a part of the display, a height of the first member is substantially identical to a height of the display, and a width of the first member or a height of the second member is substantially identical to the first side of the display.

Abstract: An electronic apparatus is disclosed. In one embodiment, an electronic apparatus comprises a display, a cover member, a piezoelectric vibrating element, a controller, a housing, a bonding material, and an intervening member. The bonding material between the housing and a peripheral end of an inner surface of the cover member is configured to bond the housing and the cover member. The inner surface of the cover member includes a partial region in which the bonding material is absent. The partial region includes a region in which the piezoelectric vibrating element is located and extends to one part of a periphery of the inner surface. The intervening member is located between the housing and a region of the partial region close to the one part of the periphery relative to the piezoelectric vibrating element and is less likely to interfere with a vibration of the cover member than the bonding material.

Abstract: A speaker is provided in the present disclosure. The speaker includes a membrane, a voice coil connected to the membrane, and a solder pad formed on the membrane. The membrane includes a conductive silicone portion and a non-conductive silicone portion. The voice coil includes a coil portion for driving the membrane to vibrate, and a line lead portion led out from an end of the coil portion. The line led portion is connected to the solder pad, and the solder pad is formed on the conductive silicone portion of the membrane. The conductive silicone portion is connected to an input terminal of the speaker to receive an electric signal for driving the voice coil.

Abstract: The present invention provides systems and methods for providing television schedule and/or listing information to a viewer, and for allowing the viewer to link, search, select and interact with information in a remote database, e.g., a database on the internet. The television schedule and/or listing information can be displayed on a variety of viewer interfaces, such as televisions screens, computer monitors, PCTV screens and the like. The television schedule and/or listing information may be stored on the viewer's computer, television, PCTV, or a remote server (e.g., a website), or the television schedule and/or listing information may be downloaded from a remote database to the viewer's computer, television or PCTV.

Abstract: A speaker assembly includes a support structure and a tactile vibrator coupled to the support structure. The tactile vibrator includes a plurality of rigid members coupled to a plurality of suspension members. Each rigid member of the plurality of rigid members has at least one magnetic member coupled thereto for generating tactile vibrations during operation of the speaker assembly. A headphone includes the speaker assembly. A method of operating a speaker assembly includes driving a tactile vibrator having a plurality of magnetic members coupled to a plurality of rigid members and a plurality of suspension members to cause tactile vibrations in the speaker assembly.

Abstract: A speaker includes an outer frame, a stretchable membrane material enclosed at least in part by the outer frame; a plurality of movable actuator devices disposed perpendicular to and on one side of the membrane material, each one of the actuator devices being connected to one side of the membrane material. The speaker also includes a controller configured to control creation of one or more radiating speaker elements at any selected instance in time and at corresponding one or more locations at the membrane material by controlling movement of a selected one or more of the movable actuator devices.

Abstract: A flat-type speaker includes a voice coil plate, a pair of magnetic bodies having a magnet and a yoke formed side by side, separated at a predetermined interval; the voice coil plate being in a space between the magnetic bodies, and having printed thereon a voice coil with a spiral pattern; a vibration-lead plate having physically separated first and second vibration-lead plates, each having +, ? terminals formed on the front ends thereof, the first and the second vibration-lead plates each equipped with a coil plate spline, which adheres to the upper end of the voice coil plate, and at least one wing spline having one end thereof connected to the coil plate spline and the other end connected to the terminals; and a vibration plate, which vibrates from the vibration received from the voice coil plate, while being contacted to the upper end portion of the vibration-lead plate.

Abstract: A flat-type speaker having a damper-lead plate of a PCB voice coil plate includes a pair of magnetic bodies having a magnet and a yoke formed side-by-side, separated at a predetermined interval; a voice coil plate inserted between the magnetic bodies, and having printed thereon a voice coil with a spiral pattern; a first damper-lead plate physically separated from a second damper-lead plate, each having +, ? terminals formed on the front ends thereof, the first and the second damper-lead plates each equipped with a coil plate spline, which adheres to the upper end of the voice coil plate, and at least one wing spline having one end thereof connected to the coil plate spline and the other end connected to the terminals; and a vibration plate, which vibrates from the vibration received from the voice coil plate, while being contacted to the upper end portion of the damper-lead plate.

Abstract: A complex speaker system includes a conical speaker including a recessed section at a surface thereof and configured to receive a sound-playback signal and reproduce sound and a distributed mode speaker installed in the recessed section of the conical speaker and configured to share the sound-playback signal input into the conical speaker.

Abstract: Generally disclosed herein are transducers that can convert sound energy into electrical signals, such as to detect if a pressure wave includes a specific frequency. Methods of using the transducers and systems that include the transducers are disclosed herein as well. A transducer can include a first probe plate, a second probe plate, a ground plate situated between the first and second probe plates, a first electret film adjacent to a first side of the ground plate and situated between the first and second probe plates, and a second electret film adjacent to a second side of the ground plate and situated between the first and second probe plates, the second side opposite the first side.

Abstract: An acoustic generator according to an embodiment is provided with a vibration body, an exciter (piezoelectric vibration element), and a coating portion. The exciter is joined onto the vibration body through a joining portion. The coating portion is provided from the exciter to the vibration body. Furthermore, at least a part of an outer periphery of the joining portion is positioned inside of an outer periphery of the exciter, and a part of the coating portion is interposed between the vibration body and the exciter.

Abstract: An apparatus including a frame; and a speaker connected to the frame. The speaker includes at least one vibrating element and least one display element. The least one vibrating element is configured to at least partially move the at least one display element generate sound waves from the at least one display element. A connection of the speaker to the frame includes a first section at a first location of the at least one display element and a second section at a second location of the at least one display element. The first section includes a soft suspension of the at least one display element between the at least one display element and the frame. The second section includes a harder suspension of the at least one display element between the at least one display element and the frame than the first section.

Abstract: The present invention relates to a vibration module for a sound transducer and, more particularly, to a vibration module for a sound transducer which can prevent sound leakage by minimizing contacts between a diaphragm and a voice coil. The vibration module for the sound transducer according to the present invention comprises: a substrate having an inner portion and an outer portion, an electrical connection portion for applying electrical signals to a voice coil being provided on the inner portion and a terminal being provided on the outer portion, for performing electrical connection between the electrical connection portion and the terminal; a first diaphragm attached between the inner portion and outer portion of the substrate; and the voice coil mounted on the inside of the inner portion of the substrate with a certain distance from the first diaphragm and electrically connected to the electrical connection portion.

Abstract: The present invention relates to a high-output microspeaker, and more particularly, to a high-output microspeaker which includes a damper for preventing lateral vibrations of a diaphragm.

Abstract: The present invention provides a flat speaker, in particular in the aerospace sector, with a panel for generating acoustic signals by vibration of the same, and a vibration exciter which is connected to a panel and excites this to vibrate. Here the panel has an edge stiffening. This provides the panel with the required stiffness, particularly against hand pressures, but at the same it guarantees high energy efficiency of the flat speaker.

Abstract: A planar speaker system may include a bottom frame having a cavity. Within this cavity a plurality of magnets may be arranged to form a substantially circular pattern. A diaphragm that includes a plurality of electrically conductive traces may be connected to the bottom frame and extend across the cavity of the bottom frame. When alternating current flows through the electrically conductive traces, the diaphragm may vibrate in response to the interaction between the current flowing in the electrically conductive traces and the magnetic field, thereby producing sound. The planar speaker system may include a top frame having a cavity, and a second set of magnets may be disposed in the cavity of the top frame.

Abstract: The present invention relates to a flat-panel speaker, and more particularly, to a flat-panel speaker having a multilayer PCB pattern voice coil film, which enables induced electromotive force to be increased by controlling the impedance of the multilayer voice coil film. The flat panel speaker having the multilayer PCB pattern voice coil film according to the present invention is characterized in that the voice coil comprises: a PCB (printed circuit board) pattern printed thereon and voice coil films stacked in an even number of 4 layers or more. Two layers each of said voice coil films are mutually connected in series, and the serially-connected voice coil films are connected to each other in parallel.

Abstract: A single-ended planar transducer device for generating a sound signal based on an electrical signal comprising at least two primary rows of primary magnets, at least one return row of at least one return structure, a diaphragm, a conductive trace formed on the diaphragm, and a frame. The frame supports two primary rows to define at least one core set comprising no more than two primary rows. A primary magnetic field is established between the primary rows in the at least one core set. The frame supports at least one return row adjacent to the at least one core set. A return magnetic field is established between each return row and any primary row adjacent thereto. A first portion of the trace is arranged at least partly within each primary magnetic field and a second portion of the trace is arranged at least partly within each return magnetic field.

Abstract: A flat panel speaker system is provided. The system includes, a modified panel having a front surface and a rear surface, wherein the modified panel acts as a diaphragm for the flat panel speaker system; a supporting member coupled to the rear surface of the modified panel; and a detachable driver operationally coupled to the supporting member.

Abstract: A circuit for operating loudspeakers includes a first, second, third and fourth loudspeaker circuit, having one input each for injecting a signal and one output each for connecting a loudspeaker input. The loudspeaker circuits are designed to amplify the injected signal and to provide the amplified signal at the outputs thereof. The loudspeaker circuits can, for example, be used for a 2.1 sound system. The three channels for a 2.1 sound system can be implemented by an amplifier circuit with four loudspeaker circuits, one loudspeaker circuit each being required for the two stereo channels left and right. A subwoofer channel can be driven differentially by two loudspeaker circuits. The stereo channels are, by contrast, only still connected to one loudspeaker circuit each, and so the stereo channels require at least one further common ground cable.

Abstract: A diaphragm arrangement includes a middle foaming layer defining a first flat surface and an opposed flat surface, a first layer overlapped on the first flat surface of the middle foaming layer, and a second layer overlapped on the second flat surface of the middle foaming layer to form a flat speaker diaphragm which is arranged to mount at an opening of a supporting frame of a speaker.

Abstract: A slim speaker structure having a vibration effect includes a frame, ceramic elements configured on a surface of the frame, and a sound membrane disposed on the bottom of frame, where at least two first accepting portions are respectively configured on the frame adjacent to the sides thereof, allowing the corners of the first accepting portions to be respectively coupled to the main body of the frame with an overhanging section, and a second accepting portion is configured on the center of the frame, thereby allowing different response frequencies of vibration and sound ceramic elements to be mounted on the respective first and second accepting portions so as to constitute a slim speaker structure having a vibration effect, capable of being applied on cellular phones or tablets with a touch screen. Therefore, the vibration prompt and sound broadcasting can be constituted at the same plane through the different ceramic elements.

Abstract: The invention relates to a loudspeaker system in which the diaphragm of the speaker has a defined material thickness particularly in the edge region thereof and comprises a suspension which is axially symmetrical about the mechanical rest position of said diaphragm and is formed by one, preferably two identical mirrored components, characterized in that the sound emission towards the rear is performed to at least 50 percent by the inner space of a magnetic system. The invention further relates to the use of the loudspeaker system as loudspeaker boxes or in radios, television screens, radio receivers, hand-held radio devices, measurement receivers, mobile telephones and headphones or the like.

Abstract: The invention provides, in some aspects, an audio headphone suitable for conversion to a loudspeaker. The device includes one or more earcups, each having a concavity that includes first and second volumetric regions and a wall that seals the regions from one another. The first volumetric region defines a space that receives a pinnea when the headphone is worn by a user, and the second volumetric region has one or more active drivers (a/k/a “speakers”). The wall includes one or more active diaphragms of those one or more active drivers. Those diaphragms generate front waves directed into the first volumetric region and back waves directed (back) into the second volumetric region. A passive radiator that is elastically mounted in the wall passes to the first volume from the second volume at least a portion of back waves generated by one or more of the active diaphragms. The invention provides, in other aspects, portable loudspeakers constructed in a manner of the earcups described above.

Abstract: An electrostatic loudspeaker includes: a vibrating member; an electrode disposed so as to be opposed to the vibrating member; a spacer member disposed on an opposite side of a face of the electrode, which is opposed to the vibrating member, and having acoustic transmission property; and a cover member disposed on an opposite side of a face of the spacer member, which is opposed to the electrode, and having waterproof property and insulation property.