Abstract: An apparatus comprising a combination of a microphone and a composite acoustic panel. The composite acoustic panel comprises materials having different spectra of acoustic absorption. The materials may be integrated in a single layer or in a plurality of different layers.

Abstract: A cover unit that is provided to an electronic device as a waterproof cover, the cover unit covering one or more openings formed in a housing of the electronic device with respect to a plurality of speakers, and comprising a frame member having a plurality of windows disposed therein, the windows facing the speakers in one-to-one correspondence, and a waterproof film covering the windows. Having such a structure, the cover unit covers the one or more openings formed in the housing, and has an advantageous effect of suppressing at least one of (i) an increase in parts composing an electronic device and (ii) an increase in distortion of sound. Additionally, since a vibration unit faces a corresponding one of the speakers, the unnecessary vibration of the vibration unit is inhibited, which leads to a reduction in the distortion of sound.

Abstract: The present invention relates to a novel protective cover for over-the-ear or behind-the-ear hearing aid devices, wherein the protective cover is resistant to infiltration of moisture, corrosive elements, and/or dirt or debris. Furthermore, in at least one embodiment, the protective cover comprises a flexible material that offers a formed fit over the hearing aid device, and includes at least one slit within the flexible material such that the protective cover may be readily flipped up to allow access to portions of the over-the-ear or behind-the-ear hearing aid device upon which it is placed without significant effort by the user.

Abstract: A microphone comprises a three-pin socket, a first USB socket and a USB adapter. The first USB socket is fixed within the three-pin socket. The three-pin socket comprises an inserted block and three pins. The three pins are fixed on the inserted block. The first USB socket is embedded in the inserted block. The USB adapter comprises a USB plug which matches the first USB socket and a second USB socket which has a different dimension from the first USB socket. The USB plug and the second USB socket are connected electrically. The microphone can be normally used at all occasions. The dimension of the finished product is reduced so as to save a very large space. The microphone can be electrically connected with a USB data line with a USB plug having a different dimension from the first USB socket.

Abstract: A medical grade stereo system is disclosed. The stereo system may include a housing with faceplates where a user interface and connectors mounted to the faceplates form fully sealed interfaces sealing the housing interior from the environment. A shielding enclosure and shielded components provide a system that may limit radio frequency emissions. A power supply supplying power to the system may limit current leakage to less than 300 microamperes. A hospital grade A/C power cord and electrical plug connect the system to a room's electrical line. Additionally, the system may include an internally formed interface for a satellite tuner adaptor cable connection connecting a satellite tuner to a stereo receiver hub entirely within the housing and enclosure.

Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.

Abstract: An apparatus for reducing background and wind noise to a microphone contained in a microphone casing comprises a clamshell enclosure. The clamshell enclosure has a top piece and a bottom piece held together by a hinge or a plastic membrane, wherein the clamshell enclosure is designed to encapsulate the microphone casing containing the microphone. The clamshell enclosure contains foam materials inside the clamshell enclosure, or the clamshell enclosure itself is made out of foam materials such as polyurethane, wherein the foam materials contribute to reduction of background and wind noises to the microphone. The clamshell enclosure may optionally incorporate one or more channels as electrical cord pathways between the microphone casing encapsulated in the clamshell enclosure and another object (e.g. electronic device, earphones, and etc.).

Abstract: An acoustically resistive protective cover assembly for an opening in a casing is provided, the casing separates an enclosed space from the ambient space and has an exposed face oriented toward the ambient space and an internal face oriented toward the internal space. The cover assembly comprises an acoustically resistive porous material disposed upon the exposed face of the case and an acoustically resistive water repellant material disposed upon the internal face of the case.

Abstract: In a gooseneck microphone in which a support pipe is capable of extending and contracting, and accordingly a microphone cord extension/contraction part is provided in an output module section, the microphone cord soldered part on a circuit board is prevented from being rubbed by the microphone cord extension/contraction part.

Abstract: There is provided a waterproof hearing aid capable of being worn without caring about the entry of sweat or water even at the time of sweating or bathing. The waterproof hearing aid has a first waterproof film stretchingly provided at the sound inlet of a microphone and a second waterproof film stretchingly provided at the sound outlet of an earphone, a tube (first vent) communicating a microphone chamber formed by the first waterproof film and the microphone with a hearing aid case chamber formed by a hearing aid case, a tube (second vent) communicating an earphone chamber formed by the second waterproof film and the earphone with the hearing aid case chamber, and a porous film (third vent) communicating the hearing aid case chamber with the outside.

Abstract: In a gooseneck condenser microphone that supports a condenser microphone unit via a support pipe, when the microphone is used by inserting a microphone cable through the support pipe in the state in which a shield covered wire having no skin is exposed throughout the entire length thereof, the movement of the microphone cable in the support pipe is restricted, by which the generation of noise caused by looseness contact of the shield covered wire with the inner wall of the support pipe is prevented.

Abstract: To provide a wireless microphone device that enables a circuit board, which is to be provided with an oscillation circuit, to be decreased in size without deteriorating radiation characteristics. The wireless microphone device is configured to include: a circuit board 5 that is sectioned into circuit areas 11a and 11b and makes the respective circuit areas function as antenna elements of a dipole antenna; an oscillation circuit 21 that is arranged in the circuit area 11b and generates a high frequency signal on the basis of a voice signal from a microphone 2a; a feeding path for feeding the high frequency signal to an electrically conductive layer 11 in the circuit area 11b through a feeding point positioned on the circuit area 11a side distant from the oscillation circuit 21; and a high frequency shield covering at least a part of the feeding path.

Abstract: A wireless communication device includes a speaker grille, a built-in speaker provided behind the speaker grille, and an output amplifier connected to the built-in speaker. A voltage applied to the output amplifier is increased to a level higher than the level of voltage applied to the output amplifier while audio signals are being produced, and instead of the audio signals, low-frequency continuous signals are applied to the output amplifier. By increasing the voltage applied to the output amplifier to a level higher than the level of voltage applied to the output amplifier while audio signals are being produced, the amplitude of the voltage applied to the speaker is increased. Also, instead of the audio signals, low-frequency continuous signals are applied to the output amplifier so that the speaker produces a higher sound pressure than while audio signals are being produced to discharge water in the speaker grille under the sound pressure.

Abstract: A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, a method is provided for mounting a loudspeaker driver in a loudspeaker driver aperture defined in a ground plane and installing a grille in relation to the ground plane such that a distance between the grille and the ground plane decreases as the distance from the loudspeaker driver increases. In accordance with at least one embodiment, apparatus is provided comprising a ground plane, a loudspeaker driver mounted in a loudspeaker driver aperture of the ground plane, and a grille positioned relative to the ground plane such that a distance between the grille and the ground plane decreases with increasing distance from the loudspeaker driver.

Abstract: Disclosed is a silicone based condenser microphone comprising: a metal case which includes a sound hole, a board which is mounted with a MEMS microphone chip and an ASIC chip having an electric voltage pump and a buffer IC and is formed with a connecting pattern for joining with the metal case. A fixing material for fixing the metal case to the board, and an adhesive for applying to the whole part where the metal case fixed to the board by the fixing material is joined with the board to bond the metal case to the board. Therefore, the metal case is tack-welded to the board by a laser to fix the case to the board and then the case is bonded to the board with the adhesive, thereby decreasing an inferiority ratio and strengthening a joining force and thus enhancing a mechanical firmness and highly resisting noise from the outside.

Abstract: A microphone module includes a cabinet, a sensor, an integrated circuit chip, a first substrate, and a second substrate. The first substrate carries the integrated circuit chip and includes a first top surface, a first bottom surface, and a first shielding part with a fixed electric potential extending from the first top surface to the first bottom surface. The second substrate includes a second top surface contacting the first bottom surface, a second bottom surface, and a second shielding part with the fixed electric potential on the second bottom surface, wherein the second shielding part is arranged in such a way that no electromagnetic waves can pass between the first shielding part and the second shielding part.

Abstract: An electrostatic loudspeaker includes a backplate having a metal film acting as one electrode of a capacitor and defining a number of sound apertures therein; a diaphragm insulatively spaced a distance from the backplate to form the capacitor; the diaphragm comprising a metal film acting as the other electrode of the capacitor; a back chamber having a substrate and an insulative spacer for joining edge portions of the diaphragm and the substrate; a driving circuit element for converting electrical signals from exterior input pads into driving signals to drive the diaphragm to vibrate and sound; the driving circuit element being mounted on an inner surface of the substrate and being accommodated in the back chamber; and a first, second and third connection paths for respectively electrically connecting the driving circuit element with the two electrodes of the capacitor, and the exterior input pads. An electrostatic loudspeaker with two backplates is also disclosed.

Abstract: A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, a method is provided which comprises forming a loudspeaker frame so as to define a driver housing portion, a horn portion, and a conformal portion. A driver aperture is defined for the driver housing portion, and a port aperture is defined for the horn portion. A driver is attached to the loudspeaker frame proximate to the driver aperture. A rear baffle is applied to a first conformal portion surface of the conformal portion of the loudspeaker frame. The rear baffle defines a horn cavity wall of a horn cavity of the horn portion. The horn cavity has an increasing cross sectional area as the distance from the driver housing portion increases. A grille is applied to a second conformal portion surface of the conformal portion of the loudspeaker frame.

Abstract: A cooling device for an acoustic apparatus includes a cooling fan that is turned on and off, and adjusted in quantity of airflow in accordance with an apparatus temperature, wherein when the apparatus temperature is lower than a value requiring immediate cooling, and when an audio output is in a mute state, the cooling fan is not changed in operating state.

Abstract: A shielding device for a hearing aid is able to shield components against interference from the outside and vice versa. The shielding device has at least three sections, which are each connected to one another via a flexible connecting section. It being possible for at least a first section to be provided with a printed circuit board and to be populated with at least one component and/or an integrated circuit, it being possible for the two other sections to be folded around the first section by the flexible connecting sections, in order to shield the first section.

Abstract: There is provided an electrical connector especially suitable for a condenser microphone, which connector is, though being small in size, provided with an electromagnetic wave shielding unit that is capable of easily being installed in the connector and is equivalent to an EMI core. The electrical connector includes a cylindrical connector housing 10; a connector element 20; and a connection cable 30, and is configured so that the connector element 20 is supported on one end side of the connector housing 10, and the connection cable is drawn into the connector housing 10 through a cable insertion part 10b on the other end side of the connector housing 10 and thereby connected electrically to the connector element 20. In this electrical connector, a magnetic fluid 62, and a permanent magnet 61 for magnetically attracting the magnetic fluid 62 are housed in an excess space between the connector element 20 and the cable insertion part 10b in the connector housing 10.

Abstract: A micro-electro-mechanical-system microphone package includes a substrate, a micro-electro-mechanical-system microphone chip mounted on the substrate, and a cover attached to the substrate to cover the micro-electro-mechanical-system microphone chip. The cover is provided with a sound inlet through which the micro-electro-mechanical-system microphone receives external sound. The micro-electro-mechanical-system microphone chip includes a conductive base connected to a constant voltage, a shielding layer supported by the conductive base and connected to the constant voltage, a diaphragm disposed between the conductive base and the shielding layer, and a back plate also disposed between the conductive base and the shielding layer.

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: The present invention relates to an electromagnetically-countered display system including at least one wave source and at least one counter unit, where such a wave source irradiates harmful electromagnetic waves and the counter unit emits counter electromagnetic waves for countering the harmful waves therewith. More particularly, the present invention relates to various counter units for the electromagnetically-countered display system and to various mechanisms to counter the harmful waves with the counter units, e.g., by matching configurations of the counter units with those of the wave sources, by matching wavefronts of the harmful waves with those the counter waves, and so on. The present invention also relates to various methods of countering the harmful waves with such counter waves by source and/or wave matchings, various methods of providing the counter units for emitting the counter waves defining desired wave characteristics, and the like.

Abstract: This invention provides an audio speaker with improved physical safety isolation between a voice coil and other electrically live elements.

Abstract: A microphone has at least one non-conductive component with at least one side covered by a metal layer which in turn is covered by a protective layer, and the microphone can be a component of a delegate unit of a conference system or a congress system.

Abstract: A portable waterproof equipment includes a body configured for containing articles therein, a sealing structure, a cable and a sealing device. The body has an opening configured for providing an access for the articles entering into the body. The sealing structure is configured for sealing the opening of the body. The cable passes through the body and has an inner end located within the body. A plug is provided at the inner end of the cable and configured for connecting with phone jacks of the articles. The sealing device is arranged between the cable and the body.

Abstract: A speaker module for a consumer electronics device encloses a speaker. The speaker module is sized to fit within a housing of the consumer electronics device and below an input control of the consumer electronics device. The speaker module is oriented so that the speaker projects audible sound through one or more interstitial gaps between the input control and the housing, or one or more through-holes formed in the input control.

Abstract: A device includes a main body, a microphone module, and an acoustic guard. The microphone module is connected to the main body and comprises a first acoustic opening and a second acoustic opening, wherein the microphone module receives sound waves via both the first and second acoustic openings. The acoustic guard covers the second acoustic opening and comprises a first sound inlet via which the sound waves enter the acoustic guard and reach the second acoustic opening.

Abstract: A directional silicon condenser microphone which has an additional back chamber includes a case having a front sound hole for passing through a front sound; an acoustic delay device for delaying a phase of a sound; a substrate including a chamber case, a MEMS chip having an additional back chamber formed by the chamber case, an ASIC chip for operating the MEMS chip, a conductive pattern for bonding the substrate to the case, and a rear sound hole for passing through a rear sound. The case is fixed to the substrate; and an adhesive for bonding the case and the substrate is applied to an entirety of a bonding surface of the case and the substrate.

Abstract: A silicon condenser microphone has an additional back chamber and a sound hole in a PCB. The microphone includes a case for blocking an external sound; a substrate including a chamber case, a MEMS chip having an additional back chamber formed by the chamber case, an ASIC chip for operating the MEMS chip, a conductive pattern for a bonding to the case, and a sound hole for passing the external sound. A fixing means fixes the case to the substrate and an adhesive is applied to an entirety of a bonding surface of the case and the substrate fixed by the fixing means. When the sound hole is formed through the PCB instead of the case, the mounting space for a microphone is reduced. The chamber case forms the additional back chamber under the MEMS chip and is employed to increase back chamber space to improve sensitivity and reduce noise.

Abstract: Audio systems are housed by an enclosure with a substantially waterproof seal such that the audio systems may be mounted in outdoor locations such as decks, boat docks, and the like. The enclosure may include a panel that opens relative to a tub portion, such as by a hinged connection, and a substantially waterproof seal located there between. The audio systems may include one or more various features such as external speaker connections so that speakers may be located distantly from the enclosure. Other features may include internal amplification that may be stand-alone or integrated into an audio signal source such as a radio or compact disc player or combinational device such as an automobile head unit. Additional features may include a power supply that provides power for the amplification and/or audio source, an external cover with a substantially waterproof seal relative to the enclosure, filtered ventilation via an electric fan, and other related features.

Abstract: The invention relates to a microelectromechanical microphone packaging system. The microelectromechanical microphone packaging system comprises a substrate, a chip, a microelectromechanical microphone, a conductive glue, a non-conductive glue and a cover. The substrate has a first surface. The chip is mounted on the first surface of the substrate. The microelectromechanical microphone is mounted on the first surface of the substrate, and electrically connected to the chip. The chip is enclosed by the non-conductive glue. The non-conductive glue is enclosed by the conductive glue. The cover is mounted on the first surface of the substrate to form a containing space, and has an acoustic aperture. The microelectromechanical microphone packaging system utilizes the conductive glue enclosing the chip and the non-conductive glue to shield interference from outside noise and obtain a shielding effect. In addition, the cover does not need to be made of metal material.

Abstract: A microphone shield system captures sound in adverse conditions. The system includes a microphone positioned within a membrane. The membrane is inflated around the microphone to form an enclosure. The inflated membrane passes signals within a selected frequency range. The membrane may block or attenuate signals above and/or below the frequency range to pass a desired sound with little surrounding interference.

Abstract: The present invention relates to electromagnetically-shielded speaker (or microphone) systems for generating acoustic sounds (or electric signals) based upon electric signals (or acoustic sounds) supplied thereto while minimizing irradiation of undesirable electromagnetic waves. More particularly, the present invention relates to various speaker systems each of which has at least one source for emitting the undesirable waves and at least one counter member for emitting counter electromagnetic waves capable of canceling at least a substantial portion of the undesirable waves due to their phase characteristics. The present invention instead relates to various speaker systems each of which has at least one electric and/or magnetic shields capable of shielding and/or terminating electric waves and magnetic waves of the undesirable waves, respectively.

Abstract: A directional silicon condenser microphone having an additional back chamber is disclosed. The directional silicon condenser microphone comprises a case having a front sound hole for passing through a front sound; a acoustic delay device for delaying a phase of a sound; a substrate including a chamber case, a MEMS chip having an additional back chamber formed by the chamber case, an ASIC chip for operating the MEMS chip, a conductive pattern for bonding the substrate to the case, and a rear sound hole for passing through a rear sound; a fixing means for fixing the case to the substrate; and an adhesive for bonding the case and the substrate, wherein the adhesive is applied to an entirety of a bonding surface of the case and the substrate fixed by the fixing means.

Abstract: Sintered elements for use in hazardous areas comprise a first flame path having a first length and a first pore size, and a second flame path having a second length and a second pore size. The second length is greater than the first length and the second pore size is greater than the first pore size. Sounders and loud speakers for use in hazardous areas comprise a housing having a horn and a rear enclosure, a driver assembly, and a sintered element.

Abstract: The present invention relates to an electromagnetically-countered system including at least one wave source irradiating harmful electromagnetic waves and at least one counter unit emitting counter electromagnetic waves for countering the harmful waves by such counter waves. More particularly, the present invention relates to generic counter units of electromagnetically-countered systems and to various mechanisms for countering the harmful waves by the counter units such as, e.g., by matching configurations of the counter units with those of the wave sources, matching shapes of such counter waves with shapes of the harmful waves, and the like. The present invention also relates to various methods of countering the harmful waves with the counter waves by such source matching or wave matching and various methods of providing the counter units as well as counter waves. The present invention further relates to various processes for providing such systems, such counter units thereof, and the like.

Abstract: A wind-shielded acoustic sensor, having a microphone and a housing of the microphone. The housing has a streamlined, continuous profile about a latitudinal axis and a longitudinal axis thereof, such that wind-induced noise can be reduced. A plurality of uniformly spaced sound ports are formed along a plurality of circumferences centered about a longitudinal axis thereof. At least one region of the housing is sufficiently thin and pliable such that deformation will occur while subjected to wind. Thereby, both acoustic signals and wind-related random-like pressure fluctuations are transmitted into the cavity enclosed by the housing.

Abstract: The present invention relates to an electromagnetically-countered system including at least one wave source irradiating harmful electromagnetic waves and at least one counter unit emitting counter electromagnetic waves for countering the harmful waves by such counter waves. More particularly, the present invention relates to generic counter units of electromagnetically-countered systems and to various mechanisms for countering the harmful waves by the counter units such as, e.g., by matching configurations of the counter units with those of the wave sources, matching shapes of such counter waves with shapes of the harmful waves, and the like. The present invention also relates to various methods of countering the harmful waves with the counter waves by such source matching or wave matching and various methods of providing the counter units as well as counter waves. The present invention further relates to various processes for providing such systems, such counter units thereof, and the like.

Abstract: An exemplary electromagnetic interference shielding structure, includes a substrate and a metallic film formed on at least one surface of the substrate. The substrate is made of an alloy of Ni and Fe, and the metallic film is made of an alloy of Ni, Fe, Cu and Mo.

Abstract: A method and apparatus for providing a loudspeaker assembly is provided. In accordance with at least one embodiment, a method is provided which comprises forming a loudspeaker frame so as to define a driver housing portion, a horn portion, and a conformal portion. A driver aperture is defined for the driver housing portion, and a port aperture is defined for the horn portion. A driver is attached to the loudspeaker frame proximate to the driver aperture. A rear baffle is applied to a first conformal portion surface of the conformal portion of the loudspeaker frame. The rear baffle defines a horn cavity wall of a horn cavity of the horn portion. The horn cavity has an increasing cross sectional area as the distance from the driver housing portion increases. A grille is applied to a second conformal portion surface of the conformal portion of the loudspeaker frame.

Abstract: A wide dispersion speaker system 1 comprises a cone type speaker unit 2, and a restricting element 10A. The restricting element 10A is provided with a center hole 11 at a center section thereof, and a peripheral hole 12 located outward relative to the center hole 11. The restricting element 10A has an annular sound travel inhibiting portion 19 positioned radially outward relative to the center hole 11 and radially inward relative to the peripheral hole 12. An outer end in a radial direction of the sound travel inhibiting portion 19 is positioned at a substantially middle point between an outer end in the radial direction of the center hole 11 and an outer end in the radial direction of the peripheral hole 12 or positioned radially outward relative to the substantially middle point.

Abstract: A preferred embodiment of portable lunchbox equipment that is particularly useful at construction and other jobsites is disclosed which provides important desirable features and functionality comprising a housing, at least one charger for charging a removable battery pack, an audio unit for producing an audio signal, a heating unit, an insulated compartment, a cooling unit for the compartment, a cord and plug for connecting said apparatus to a source of AC power, and circuitry for selectively applying power to the audio unit, the charger and the heating unit.

Abstract: The present invention aims to stabilize sound-electricity conversion characteristics of a diaphragm-type sound-electricity conversion device as well as to decrease the noise level of an ultrasonic diagnostic apparatus using the sound-electricity conversion device. The sound-electricity conversion device is configured by a capacitor cell including a lower electrode formed on a silicon substrate and an upper electrode over the lower electrode, the lower and upper electrodes sandwiching a cavity. An electrode short-circuit prevention film is formed on the upper electrode on the cavity side. The electrode short-circuit prevention film is formed of a material with an electrical time constant shorter than 1 second and longer than 10 microseconds, such as silicon nitride containing a stoichiometrically excessive amount of silicon.

Abstract: A capacitor microphone includes a battery holder including a microphone unit housing at one end and a battery holder at the other end, the battery holder being coupled to a connector sleeve; an output connector housed in the connector sleeve, and detachably receiving a grounding sleeve of a microphone cable; a cylindrical conductive battery cover which is movable between a position covering the battery holder and a position releasing the battery holder and is electrically connected to the microphone unit housing at the position covering the battery holder; and an elastic and conductive cloth which is present between the connector sleeve and the battery cover, and is in contact with the connector sleeve and the battery cover, the connector sleeve and the battery cover being electrically connected.

Abstract: A microphone shell includes a top wall and a side wall extending downwardly from peripheral area of the top wall. A receiving room is formed between the top wall and the side wall for containing a microphone soldered with a printed circuit board, and a through hole arranged on center of the top wall. Voice is transmitted only through the through hole and gathered in the receiving room of the microphone shell, and then received by the microphone. In addition the microphone receives no external noise because the microphone shell covers the microphone and obstructs the external noise. Therefore, the microphone shell not only gathers voice but also obstructs noise.

Abstract: A mount assembly for a personal microphone is described. The mount assembly includes a spring-biased clip and a cage. The clip connects the assembly to an article of clothing. The cage is formed from an elongated bar made of rigid material. The bar is formed into a helix to define an enclosure that receives a microphone. The spirals of the helix may form a conical structure formed of spirals with increasing diameters. The cage may further include a base that secures the transmission cable of the microphone. The assembly protects the microphone from contact with objects, thus minimizes ambient and mechanical interference.

Abstract: In a condenser microphone having a microphone case formed by a casting, the resistivity of the surface of the microphone case is decreased surely, and the shielding function of the microphone case is made stable. In a condenser microphone in which a substrate including an audio output circuit connected to a condenser microphone unit is housed therein, and a cylindrical microphone case 10 mounted with an output connector is provided on one end side, the microphone case 10 being formed by casting, a conductive layer 10b having a lower resistivity than that of a raw material of the microphone case 10 is formed integrally on a casting surface 10a on the outer surface side of the microphone case 10.

Abstract: The present invention relates to an electromagnetically-countered display system including at least one wave source and at least one counter unit, where such a wave source irradiates harmful electromagnetic waves and the counter unit emits counter electromagnetic waves for countering the harmful waves therewith. More particularly, the present invention relates to various counter units for the electromagnetically-countered display system and to various mechanisms to counter the harmful waves with the counter units, e.g., by matching configurations of the counter units with those of the wave sources, by matching wavefronts of the harmful waves with those the counter waves, and so on. The present invention also relates to various methods of countering the harmful waves with such counter waves by source and/or wave matchings, various methods of providing the counter units for emitting the counter waves defining desired wave characteristics, and the like.