Abstract: A garment with a speaker function is provided. The garment includes a garment body, a bag, and an electret speaker. The bag disposed on the garment body includes a sound-absorbing layer. The electret speaker, disposed in the bag, gives off sounds to a first direction and a second direction at the same time. The sound-absorbing layer absorbs the sound of the second direction. Therefore, the present invention not only provides convenience to the user, but also enhances the acoustic quality of the electret speaker.

Abstract: The present invention provides a sound image position correction system that applies sound image position correction processing to a voice signal so that an optimal sound image position is obtained. There is provided a sound image position correction system which corrects the position of a sound image output from a plurality of speakers in a multichannel reproduction system having three or more channels, which includes a speaker moving section that moves the positions of the plurality of speakers provided in the multichannel reproduction system, a speaker position detection section that detects the positions of the plurality of speakers moved by the speaker moving section, and a sound image position correction section that applies sound image position correction processing to a sound signal to be supplied to the plurality of speakers based on the positions of the speakers detected by the speaker position detection section.

Abstract: An arrangement for managing cables of accessories such as earphone sets, chargers, and synchronization arrangements used with portable electronic devices is provided by a flexible and elastically deformable loop that extends from a base that optionally includes a hook or other loop retention feature. The base may be alternatively configured to be integrally formed with a component of an accessory, or be configured as a discrete clip that may be detachably coupled to the component, or to the cable portion of the accessory. The elastically deformable loop is configured to be removably fastenable by a user to articles such as buttons on clothing to help keep cables out of the way when the accessory is in use. In addition, the elastically deformable loop may be used to keep an accessory cable neatly stowed during storage by being stretched around a bundled cable and then secured on the hook.

Abstract: The present invention discloses a flat panel display with sliding loudspeaker structure. The flat panel display comprises a display body, a sliding rail, and a sliding loudspeaker portion. The loudspeaker portion comprises a loudspeaker body, a sliding member and a connecting portion. By the matching structure of the sliding member and the sliding rail, the effect of allowing a user to freely adjust the loudspeaker body to different positions can be achieved. Besides, by further using the pivot of the loudspeaker body, the present invention allows the user to freely adjust the loudspeaker to different angular positions. Therefore, the problems of an immovably fixed loudspeaker position and angularly non-adjustable loudspeaker sound field on a conventional display are solved.

Abstract: An electronic device includes a display, a plurality of chambers, and a microphone array. The display includes a front cover and a rear cover affixed to the front cover. The plurality of chambers is formed on the rear cover. The microphone array includes a plurality of microphones disposed in the chambers.

Abstract: Normally a speaker is used by attaching to a sealed or semi-sealed cabinet so that vibration generated at the front and the back of a diaphragm does not mutually interfere. Therefore, a certain depth and a volume are necessary, and in a limited location such as a front panel of a device, there is a case that it cannot be attached to the most suitable position for a listener. As a means to solve that, a method that a speaker sound at a distant position is led to a front panel by a waveguide is practically used. However, still it has limitations in depth and attaching position, and good results cannot be obtained also in efficiency. A speaker is attached so that a sound generated at the front of the speaker attached to a cabinet is led to a plane such as a front panel of a device by a waveguide, and the opening surface of the waveguide is almost perpendicular to the plane.

Abstract: A speaker system has a laterally extending body portion for supporting the back of the head of a user and a pair of right and left side portions respectively connected to the right and left ends of the body portion. A plurality of openings in side wall of each of two speaker boxes for making communication between the inside and the outside of each speaker box, for preventing sound leakage from each speaker unit and ensuring the sound pressure level in a low-frequency range of the audio frequencies reproducible by the speaker unit.

Abstract: The present invention is a chair or similar body-supporting apparatus for sitting on, reclining on or lying upon. The chair or similar apparatus is capable of transmitting sound and vibrations generated by a sound source and/or a vibration source to a user's body. The sound and vibrations are transmitted through speakers, transducers, or a combination thereof which are connected to the chair or similar apparatus. The present invention is also a method of providing vibrational energy to a user, including regulating sound and vibrations transmitted through speakers, transducers, or a combination thereof which are connected to a chair or similar body-supporting apparatus.

Abstract: A display includes a frame-shaped front housing for fixing a display portion so as to expose the display portion, a speaker and a speaker mounting portion for mounting to be capable of outputting a sound downward and forward in a state where the speaker is inclined by a prescribed angle with respect to a front surface of the front housing, integrally formed in the vicinity of a lower end of a back surface of the front housing.

Abstract: An electronic device with touch function includes a back casing, a front casing, a display panel and a touch panel. The front casing is combined with the back casing so as to form an accommodating space. The display panel is disposed in the accommodating space. The touch panel is fixed to the front casing and the touch panel is departed from the display panel with a predetermined distance.

Abstract: A person-support apparatus comprises a frame, a sound generating device, a user interface, and a controller. The sound generating device is configured to generate an audible sound. The user interface is configured to receive an input from a user. The input corresponds to at least one of a sound conditioning system mode and an audible sound adjustment. The controller is electrically coupled to the sound generating device and the user interface. The controller is configured to control the operation of the sound generating device in accordance with the input from the user interface.

Abstract: Arrangement of an internal component (not shown) arranged in the vicinity of the top side is different from that of the hinge side of an image element protective screen (2). An actuator (5) is fixed to the top side of the image element protective screen (2) and an actuator (4) is fixed to the hinge side of the image element protective screen (2). Since Arrangement of the internal component in the vicinity of the actuator is different, different sound pressure frequency characteristics or the like are experienced when each actuator is driven independently. When the actuators (4, 5) are driven simultaneously, sound pressure frequency characteristics and vibration frequency characteristics can be flattened. Isolation between the vibration speed of a vibrator near one actuator and the vibration speed of a vibrator in the region near the other actuator that are produced by respective actuators is set at 10 dB or above.

Abstract: An electronic device (20) includes a main board (32), a protective panel (24) defining a main bore (24a), a receiver (28) and a housing (22). The protective panel is joined to an upper portion of the housing, and the housing is joined to the main board to form a chamber receiving the receiver. The housing defines a first opening (22a) corresponding to the main bore of the protective panel. The receiver and the main bore are angled relative to each other such that the main bore is partially overlapped by the receiver to form at least one secondary bore (36) on the main bore.

Abstract: A speaker apparatus arranged in a predetermined casing includes a speaker unit disposed at a predetermined position in the casing, a speaker grill section whereto sound output holes are provided, and the speaker grill section being disposed on the front of a sound output surface locating at the position of the speaker unit in the casing, while a predetermined distance is kept from the speaker unit, a first front air chamber which is disposed between the speaker unit and the speaker grill section in the casing, and separated from other sections in the casing, and a second front air chamber extending from the first front air chamber on the front of the speaker unit.

Abstract: An electronic apparatus includes an electronic-apparatus housing provided with a sound release hole, a speaker unit housed in the electronic-apparatus housing and facing the sound release hole, a grille body made of a conductive material, configured to allow sound to pass therethrough, and having a plate-like shape that is of sufficient size to cover the sound release hole, a frame made of an insulating material and detachably attached to the electronic-apparatus housing while supporting the grille body, such that the grille body covers the sound release hole, a cushion member provided on the frame and having elasticity and conductivity that allows the cushion member to be electrically continuous with the grille body, and a conductive member grounded inside the electronic-apparatus housing and, when the frame is attached to the electronic-apparatus housing, becoming electrically continuous with the grille body through the cushion member.

Abstract: A speaker system with a mount pivotally secured to a speaker frame for detachably securing the speaker system to a display monitor is disclosed. The mount pivots relative to the frame so as to allow the display monitor to be operably received between the mount and frame thereby holding the speaker system in place. A securing structure is preferably provided to hold the mount at a desired position, and resilient padding is preferably provided between the frame, mount and display monitor. The mount can also have a substantially planar bottom surface which allows the speaker system to rest on a desktop simply by positioning the substantially planar bottom surface of the mount on the desktop.

Abstract: A storage rack capable of storing an audio apparatus is provided. The storage rack includes: a top board portion, at least two leg portions, a shelf board portion, and a speaker storage portion. The top board portion supports the audio apparatus. The at least two leg portions hold the top board portion. The shelf board portion is vertically joined to a side surface of the respective leg portions and in parallel with the top board portion with an adjustable distance thereto. The speaker storage portion is arranged under the shelf board portion. The speaker storage portion is arranged at a position having a predetermined distance in the depth direction of the shelf board portion.

Abstract: An apparatus for mounting two speakers to a flat panel display device is disclosed wherein the device, utilizing standardized mounting plates provided in such flat panel display devices, enables the mounting of two speakers while providing the ability to change speaker position in regards to six different position parameters. The apparatus may be utilized in conjunction with flat panel mounting devices, such as pedestal, wall or ceiling mounts, or utilized independently thereof. More specifically, the device further provides independent adjustment of the position of each speaker mounted thereby in regard to height, fore/aft and depth position, as well as rotation about an X, Y and Z axis. The device enables one to make changes in—regard to the position of a speaker—or other peripheral devices mounted thereon—relative to one or more of the aforementioned movements without altering other aspects of speaker position, if desired.

Abstract: The invention discloses a cap with a bluetooth headset which is in the technology field of daily supplies, including a cap body. The cap body has a bluetooth headset which comprises a transceiver and two acoustic generators on the right and left respectively, the transceiver is set at either position of the cap body, each of the acoustic generators are respectively set at a side of the cap body corresponding to the ears. A piece of lead is used to connect the transceiver and acoustic generators. Compared with prior art, the invention provides dual-track voice, so as to make communication clearer, reduce noise influence on environment. The acoustic generators are fixed on both sides of the cap body so firmly that it is not prone to be dropped and lost, even under movement states, it is still very firm. The invention is applicable to outside activities, travel, riding etc.

Abstract: The present invention discloses an embedded sound box including a box body and a front panel, and the box body has a fixing plate and at least one spring plate at an end and at least one slide wedge at another end. When the sound box is installed, an end of the fixing plate having the spring plate of the box body is latched into an opening hole, and a slide wedge is retracted towards the interior of the box body, and another end of the fixing plate corresponding to the box body is installed into the opening hole, and finally the slide wedge is protruded out from the box body, such that the box body can be embedded completely into the opening hole, and the front panel is used for covering the opening hole.

Abstract: A mobile electronic device is provided. The mobile electronic device includes a housing having an ear-facing surface. Also, the mobile electronic device includes an audio transducer disposed within the housing. Further, the mobile electronic device includes an acoustic channel coupled between the audio transducer and the ear-facing surface for transmitting sound waves produced by the audio transducer to external of the ear-facing surface, wherein the audio-transducer having an audio-transmitting plane disposed at an angle other than parallel relative to the ear-facing surface.

Abstract: There is provided a case for containing a portable media player, the case including: a frame for placement of the media player; and a speaker driver mounted in a cabinet, the speaker driver connectable to an audio output of the media player. The media player may be either permanently located within the case or removable from the case. The speaker driver may be connected to the audio output of the media player using either a wired connection or a wireless connection, the speaker driver being exposed when the case is in an open mode and the speaker driver being concealed when the case is in a closed mode. The case alternates between the open mode and the closed mode using fasteners such as, for example, adhesive strips, Velcro strips, magnetic strips, or a zipper.

Abstract: An audio system has an enclosure and a transducer that is mounted to the enclosure. The transducer creates a vibration of the enclosure in response to being driven by an audio signal. A cradle assembly mechanically couples a portable device to the enclosure through one or more isolators such that only a portion of the vibration is coupled to the portable device. The enclosure is supported substantially entirely by the cradle assembly.

Abstract: An external acoustic chamber (220) for attachment to a mobile device (200) is provided. The external acoustic chamber (220) optimizes the audio performance of the mobile device (200) thus reducing the need for signal equalization and/or hardware to amplify the sound signal. The mobile device (200) includes a loudspeaker (205) and a first acoustic chamber (207) acoustically coupled to the loudspeaker (205). The external acoustic chamber (220) comprises at feast a second acoustic chamber (222) which penetrates the first acoustic chamber (207) adding volume to the first acoustic chamber (207). The combined greater volume reduces the dampening of loudspeaker (205) caused by the pressure in the first acoustic chamber (207). The result is an improvement in the frequency response of loudspeaker (205) approaching the natural frequency response of loudspeaker (205).

Abstract: A speaker system includes a cabinet, a front baffle, a speaker unit, a rear baffle, and a fitting member fitted in the rear baffle. The front baffle includes a front duct segment extending backward from the rear thereof. The rear baffle includes an opening portion, a duct connecting portion, and a receiving portion having a semicircular cross section. The receiving portion extends from the opening portion to the duct connecting portion while protruding backward. The opening portion, the receiving portion, and the duct connecting portion have a groove. The receiving portion has an engagement hole. The fitting member having a semicircular cross section is formed by double molding. The frame of the member is made of relatively rigid resin and the rim thereof is made of relatively flexible resin. The frame has an engagement projection. The receiving portion and the fitting member constitute a sealed rear duct segment.

Abstract: An improved handheld electronic device has a case with an elongated cavity formed therein. An audio transducer is in fluid communication with the cavity, and a number of sound openings are formed in the case and are in fluid communication with the cavity and with the atmosphere surrounding the handheld electronic device. The sound openings are generally spaced from a central region of the audio transducer to space the sound openings generally farther from an edge of the case than the audio transducer. The cavity is configured to form a Helmholtz resonator that enables the communication of sound through the cavity between the audio transducer and the sound openings. The spacing of the sound openings from an edge of a case helps a user to form a seal between the case and the user's ear to enable sound from the sound openings to enter the ear and to be perceived by the user.

Abstract: A wristband wirelessly connects to a mobile phone allowing a user to talk on the mobile phone by using the wristband. The wristband includes a transmitter/receiver, a speaker and a microphone. The transmitter/receiver wirelessly pairs with the mobile phone. When the mobile phone receives an incoming call, a signal is sent to a vibrator housed within the transmitter/receiver and causes the wristband to vibrate. To connect to the call, a user can push a button located on the wristband or stretch the speaker piece and place the speaker in between his/her fingers. To disconnect from the call, the user can push the button or alternatively, release the speaker piece from in between his/her fingers which automatically triggers the transmitter/receiver to disconnect from the call.

Abstract: An audio system includes an enclosure having a transducer. The transducer creates a vibration in the enclosure in response to being driven by an audio signal having a frequency range. A cradle assembly mechanically couples a portable device to the enclosure through an isolator. A portion of the vibration is coupled into the cradle assembly. The isolator reduces an amplitude of the coupled vibration so that an operation of the portable device within a portion of the frequency range is uninterrupted when the portable device is coupled to the cradle assembly.

Abstract: A duct that includes a pair of rib walls which are formed unitarily with a rear cabinet in such a manner that the rib walls face with other in the up and down direction. The duct serves as an air flow passage that extends from a rear-open portion of a speaker box and through which air flow produced by vibration of a speaker body passes. A heat radiating portion of a heat sink is disposed in the duct.

Abstract: A display device for displaying multiple images includes a first container for adapting a first display unit, a second container for adapting a second display unit, and a computing module for adjusting a first resolution of a first image generated by the first display unit into a second resolution of a second image generated by the second display unit. The second image is larger than that of the first image. Also, each display unit further includes a touch panel thereon so that the user can control the first display unit by contacting one of the touch panels.

Abstract: The invention is directed to a novelty garment, formed as a clothing article, which can broadcast a sound recording. The clothing article may be a t-shirt, tank top, or related garment having an outside and an inside. An annular sleeve is attached to the inside of the clothing article and encases a circuit board having a processor, a memory device, a power source, and a speaker. Placed around the circuit board is a waterproof bladder having a sufficient size and dimension to fit within the annular sleeve. The processor is capable of receiving signals from one or more pressure sensors, an RFID Tag or a WIFI receiver to upload a sound recording stored within the memory device for performance by the speaker.

Abstract: An electronic device equipped with a speaker includes: a first cushion member interposed between the side surfaces of the speaker and the side guides of the speaker holding section formed on the cabinet; a second cushion member that is formed of a material softer than the first cushion member and is interposed between the undersurface of the speaker and the pedestal of the speaker holding section; and a third cushion member that is formed of a material softer than the first cushion member and is interposed between the rear surface of the speaker and the backrest of the speaker holding section.

Abstract: A hat mounted music system includes a semi-rigid hatband and a flexible crown and hat bill mounted to the hatband. A retaining pocket is mounted to the hatband and is sized and shaped to hold a portable music player. First and second headphone mounts are located to align with the ears of a user. The mounts have first and second hinges. First portions of the hinges are attached to the hatband and second portions of the hinges are attached to the mounts. The hinges permit movement of the mounts from a first, open position to a second, listening position. First and second headphone modules are adapted to fit the headphone mounts. Connection wires connect the player to the headphone modules. The headphone mounts are spring-loaded and are retained in the second position by a latching mechanism. A release device allows the headphone mounts to return to the first, open position.

Abstract: A loudspeaker grille for a wall-mount loudspeaker in a home environment is disclosed, which comprises a frame attached directly to a wall where a loudspeaker being mounted, the loudspeaker enclosure lending no support to the frame, and a cover stretched across the frame, the cover being substantially transparent to acoustic energy, wherein the cover provides protection as well as decoration to the underneath loudspeaker.

Abstract: A speaker structure contains a removable food container as a resonant box. The speaker structure contains a baffling device. The baffling device contains a baffle and means for retaining an open top of the food container that is attached to the baffle. When the food container is incorporated with the baffling device, the food container works as a conventional resonant box. Furthermore, a user can freely remove the food container from the baffling device and the removed food container may serve its original food-containing function.

Abstract: A display device includes an enclosure, a pair of speakers, and a sound reflector accommodated in the enclosure. The sound reflector defines two chambers for receiving the sounds generated from the pair of speakers respectively and outputting the sounds out of the display device independently.

Abstract: A speaker device includes a speaker and a connecting component. The speaker has a pair of input terminals spaced apart with a first predetermined distance therebetween. The connecting component electrically couples the speaker to a printed circuit board. The connecting component has a relay-use printed circuit board and a pair of lead wires. The relay-use printed circuit includes a pair of sub-board portions and a separation portion. The sub-board portions have a pair of terminal holes. The input terminals of the speaker are disposed through the terminal holes, respectively. The separation portion is disposed between the sub-board portions to couple the sub-board portions with a second predetermined distance between the terminal holes of the sub-board portions, and selectively separate the sub-board portions when the first predetermined distance between the input terminals of the speaker is different from the second predetermined distance between the terminal holes of the sub-board portions.

Abstract: A sound amplifying guitar stand, the combination comprising a stand having a guitar back supporting panel extending upright, support legs, and a sound amplifier supported proximate to and at the rear of the panel, the panel configured to pass amplified audio sound forwardly, when a guitar is lifted off the stand.

Abstract: Disclosed is a mountable audio system configured to be mounted on an electronic device, such as a computer monitor, a television and a music system. The mountable audio system includes a frame assembly, a pair of audio sources and a fastening mechanism. The frame assembly includes a pair of frame members. Each frame member of the pair of frame members includes a first portion and a second portion coupled to the first portion. The pair of frame members is removably coupled to each other by slidably engaging and disengaging first portions of the pair of frame members. The pair of audio sources is coupled to second portions of the pair of frame members. The fastening mechanism is capable of detachably coupling the frame assembly and the pair of audio sources with the electronic device.

Abstract: An apparatus with a stereoscopic three-dimensional video display. The video presentation is divided into left and right views for the left and right eyes, respectively. A face plate with left and right ocular apertures is disposed on an exterior surface of the vending machine in an optimal position for viewing. A divider plate is centered between the left and right views and the left and right ocular apertures so that a viewer's left eye can only see the left view of the video presentation and vice-versa. In one embodiment, the apparatus is incorporated in a vending machine. When a purchaser buys a product from the vending machine, the purchaser may view a short video presentation through the stereoscopic display, which depicts something of interest to the viewer. In another embodiment, the apparatus in incorporated in a housing associated with media player.

Abstract: An acoustic device, including an acoustic enclosure and a first electroacoustical transducing apparatus comprising a motor structure providing mechanical vibration, the vibration having a direction of vibration, mounted in the acoustic enclosure. The acoustic device is constructed and arranged so that first pressure waves are radiated from a first radiation point and second pressure waves are radiated from a second radiation point and so that the first pressure waves and the second pressure waves destructively interfere at observation points relatively equidistant from the first and second radiation points. The acoustic device is further constructed and arranged to be structurally combined with a seating device so that the first radiation point is relatively close to the head of an occupant of the seating device and so that the second radiation point is relatively far from the head of the occupant. The acoustic device is further constructed and arranged to transmit the mechanical vibration to the seat back.

Abstract: A lighting and communication system with a horn enclosure for recessed ceiling panel or wall mounting, including a speaker with a horn expansion area to direct sound waves from the speaker to a horn enclosure front, at least one light enclosure located within the horn enclosure, the light enclosure defining a light cavity which is separated from said horn expansion area, with a light source inside the light cavity. The light source can be an LED array, which is capable of displaying text, colors or patterns in response to a control system signal.

Abstract: In an embodiment an apparatus includes a graphical display panel and a loudspeaker. The panel has a display layer for displaying images and defines a plurality of apertures penetrating through at least the display layer. The loudspeaker includes a diaphragm arranged substantially parallel to the display layer. Sound from the loudspeaker diaphragm is directed outside a host device through the apertures. The speaker may be an electret or a piezo-electric speaker for thinness. There may be apertures on an opposed side of the host device housing to achieve a dipole pattern which is directed and gives acoustic privacy to the user, or a rear acoustic cavity for a monopole pattern which more broadly disperses the sound. One illustrated embodiment is selectable between monopole and dipole. Size and total area of the holes determines acoustic resistance and so a method is described to determine those from physical parameters of the display panel.

Abstract: A speaker capable of emitting light includes a housing, a plurality of light generators, and a speaker core. The housing formed by material capable of conducting light, used as a speaker chamber of the speaker, has a first opening and a second opening. The plurality of light generators is formed nearby the second opening for generating light. The speaker core is set in the first opening of the housing for generating sound.

Abstract: A sound enhancing system includes a haptic chair formed of a chair and plural speakers mounted to the chair. The speakers receive audio input from a subject audio source and generate corresponding sound vibrations. The chair is configured to deliver the generated sound vibrations to various body parts of a user seated in the chair through the sense of touch and by bone conduction of sound. A visual display viewable by the user corresponds to the generated sound vibrations and is indicative of the corresponding audio input. The sound enhancing system enhances user experience of the audio input by any one or combination of visually, by the sense of touch, and by bone conduction of sound.

Abstract: The speaker unit 1 includes a speaker 2 and a mounting bracket 3. The mounting bracket 3 includes an attachment 16, a connecting part 17, and an elastic part 18. The attachment 16 is attached to the speaker 2. The connecting part 17 is linked with the attachment 16. The elastic part 18 is linked with the connecting part 17. A biting projection 23 and the interfering projection 24 are formed on the elastic part 18. The biting projection 23 and the interfering projection 24 project from the elastic part 18. The biting projection 23 bites an inner surface of a hole of a dashboard. The interfering projection 24 interferes with a projection formed on the inner surface of the dashboard, and is disposed at a deeper side of the hole than the projection.

Abstract: A device for housing an electronic device and which is removably secured to a hat such as a baseball hat. The device includes a front portion and two arm portions, with the electronic device preferably secured to the front portion and a speaker member disposed near the end of each arm portion. Speaker wires running from the speakers to the electronic device can be hidden by disposed the wires within the arm portions. As the device is removable it can be easily and quickly removed from securement to a first hat for use with another hat. No modifications, alterations or adjustments to the hat are required for securing the device from one hat to another.

Abstract: The invention relates to a mobile presentation device (1) having a first wheel (2) and a second wheel (3), where the first (2) and second (3) wheels each comprises an outer ring (4) rotatably arranged around an inner ring (5). Furthermore, the inner ring (5) has a first side (6) and a second side (7), wherein a presentation surface (8) is arranged on the second side (7). Further, the first (2) and second (3) wheels are fixed parallel to each other by means of a bar device (9) by which the inner rings (5) of the first (2) and second (3) wheels are connected.

Abstract: This invention is a hat specially configured to carry earphones and a music player equipped with or without an attachment clip. The hat comprises slit-like button-hole openings and grooves in the bill into which the music player clip can be attached, as well as elastic retaining straps to affix the music player and the earphones. Button holes on the hat's surface form together with the headband a conduit that allow the passage, from outside to the inside, of the electrical cables connecting the music player to the earphones. The seam between the headband and the hat is open above the ears of the wearer to allow the retrieval or stowing away of the earphones. The invention also covers a method of listening to music at the option of the user without obstructing surrounding sound by keeping the earphones stowed away in the retaining area formed by the headband.

Abstract: A system for the projection of cinematographic works or digital works with sound having at least one sound channel. The system comprises a screen and, for the sound channel, at least one woofer and at least one medium/treble transducer. The screen is a non-perforated screen. The medium/treble speaker is a flat sound transducer placed against the screen to the rear thereof in relation to the direction of projection. An extreme treble speaker is disposed on the periphery of the screen.