Abstract: A spring biased earmuff, having a flexible and generally ring-shaped frame (2) covered on an outer side and on an inner side by a fabric material (3), the frame being flexible between an open position wherein an ear may be inserted through an elongate hole (4) from the inner side of the earmuff such that the earmuff covers the ear on the outside and on the back side, and a snap on position wherein the frame exerts a biaising force for holding the earmuff to the ear, the frame having a frame front member (5) and a frame back member (6). An earphone (L) is supported by the frame, the ear phone being covered by the fabric material on the outer side of the earmuff. The earphone is removably attached to the frame (2) in a portion thereof, from where the earphone is supported outside the auditory canal of the ear in a user position of the ear muff. The frame exerts a biaising force on the earphone, away from the ear, in the hold position of the earmuff.

Abstract: The amount of data produced in the process of recording even short hearing samples by means of a monitor (1) may be considerably reduced by effecting a normalization to a range of values D and a subsequent nonlinear mapping to a second, preferably smaller range of values W. The result may be stored in an electronic memory. Further preferred measures are the spitting of the hearing samples into e.g. 6 signals each of which contains a respective frequency band of the original signal, and the conversion of the original amplitude values into energy variation values with simultaneous low pass filtering. Preferably, all cited processing steps are performed by a signal processor (9). A continuous recording time of up to 14 days by a monitor in the form of a wristwatch can thus be attained with state-of-the-art technology.

Abstract: A headphone assembly includes a pair of headphones that are operationally coupled together. Each of the headphones includes a housing having a first wall, a second wall and a peripheral wall extending between the first and second walls. A plurality of openings extends into first wall. A sound emitter is mounted within the housing. A tubular member has a first end and a second end. Each of the first and second ends is open. A fastener is adapted for selectively attaching the first end of the tubular member to the peripheral wall of the housing such that the first wall is positioned within the tubular member. Each of the second ends of the tubular members may be selectively positioned over an ear lobe such that the ear lobe is positioned within the tubular member.

Abstract: A vented tweeter with a low profile particularly suited for automotive applications where the mounting depth is limited. The tweeter comprises a motor with a central air passage extending through it and a lateral air chamber formed around it. Radial channels on the top of the motor connect the air gap in the motor with the central air passage, and radial channels under the motor connect the central air passage with the lateral air chamber. As the diaphragm oscillates, air can move back and forth between the air gap around the magnet and lateral space outside the motor. This configuration substantially increases the volume of air that can be acted on by the diaphragm without significantly increasing the length of the assembled tweeter or compromising the power of the motor. To enhance the power of the motor, a secondary magnet can be included above the top plate.

Abstract: The disclosure relates to an arrangement in hearing protection, in the form of an acoustic headset, comprising a first auditory cup (10), a second auditory cup (11) and a stirrup or headband (12) interconnecting the auditory cups (10, 11), a microphone (13) being provided for receiving ambient sound and an electronic control unit (15) actuable by means of a button set (14) being provided for transmitting sound from the microphone (13) and a radio unit (16) by the intermediary of loudspeakers (17) in the auditory cups (10, 11). The button set (14) comprises a plurality of associated buttons (18, 18?, 19, 19?, 20, 20?, 21, 22) arranged in groups, and each group of buttons being disposed, for actuation by the wearer's fingers, in a separate depression or recess (23, 24, 25, 26) in the first auditory cup (10).

Abstract: Headphones of various designs and types of construction, in particular also closed headphones, have been known for a long time. Headphones of the type mentioned above should have the desired frequency response in all frequency positions and, in particular, this frequency response should be as linear and uniform as possible in the lower frequency range in order to allow good transmission in low frequencies as well. It is the object of the invention to simplify the damping of the fundamental resonance of transducer systems, to improve quality and to save costs. Closed headphones with an acoustic transducer with a diaphragm system which separates a front volume from a rear volume, the rear volume being so small that it does not act as a spring in the range of the fundamental resonance of the transducer system.

Abstract: Tool for injection-molding a hearing protection cup which includes a curved shell with an opening for receiving an ear, and a washer which extends around the opening and is connected to the edge thereof. The washer projects inward across the opening along at least two opposite sides thereof and is intended to support a sealing and comfort ring which is intended to rest against the head. The tool includes a common mold cavity intended to produce the shell and the washer in one piece, and an insert which can be introduced into this mold cavity for forming the inner surfaces of the shell and of the washer. The insert is divided into at least three portions by means of dividing planes which extend in the same principal direction as the opposite sides of the opening. The invention also relates to a method for producing a hearing protection cup, and to a hearing protection cup produced using the method.

Abstract: A cushion for a headset earphone comprises a resilient ring having opposite input and output faces, and a through-opening defining an interior surface between the two faces. The input face has structure for acoustically coupling the opening to an output face of an audio speaker, and the output face is resiliently conformable to a lateral face of an external ear of a listener, thereby acoustically coupling the opening, and hence, the speaker, to the listener's ear. The interior surface of the cushion can be configured to effectively match the acoustical impedance at the output face of the speaker to the acoustical impedance at the entrance of the listener's ear. In one possible embodiment, the ring is formed of an elastomer filled with microcapsules containing a material capable of an endothermic phase changes at a constant temperature, such that the cushion more effectively conducts heat away from the ear, thereby providing long term listening comfort.

Abstract: A module adapted for use in a noise reduction headset earcup has an enclosure having walls separating an interior of the enclosure from an exterior of the enclosure outside the earcup. There is a driver with a diaphragm. A port connects the interior and exterior. An acoustically resistive opening connects the interior and exterior in parallel with the port.

Abstract: Multi-channel headphones capable of providing quality 3-dimensional (3-D) sound in an atmosphere of intimacy and privacy for individuals is provided. The multi-channel headphones ensure high-quality 3-D sound reproduction with accurate phase using distinct speaker units for multiple channels. The multi-channel headphones includes at least two speaker units for each ear piece, each for generating distinct sounds from multiple channels; and at least two enclosures in each of which each of the at least two speaker units arc installed. The multi-channel headphones include a sound guide portion in each of the enclosures to guide the sound emanating from the corresponding speaker unit into the listener's ear. A diffraction effect of the sound from the rear speaker can be induced.

Abstract: Headphones with a multichannel guiding mechanism having different channel speakers positioned within each of earphones and separate sound-guiding chambers for receiving the different channel speakers. In taking the acoustics into account, the separate sound chambers are installed within the earphones according to the sound effect of different channel speakers. An inner and an outer tube are installed within the first sound chamber. The inner tube defines a treble area in the middle of the front main speaker while the outer tube defines a bass area around the treble area whereby the first sound chamber has a tube-in-tube configuration. Accordingly, a clear positioning of the acoustic field is achieved by different installation position of the speakers within the earphones. In addition, the interference of sound waves is avoided and the reproduction of original sound is achieved.

Abstract: EXTENSIVE MOBILITY HELMET HEADSET AND HELMET WHICH INCLUDES SAID HEADSET. It comprises a hinged headband (2) composed by a setting support (4) to secure it onto the helmet (1), an intermediary arm (6) and a mounting support (9) of an earcup (3); the mounting support (9) being hinged (14) with the earcup (3) and the intermediary arm (6) being hinged (7a)(7b) with the mounting support (9); the hinged headband (2) can be folded and unfolded between the user's ear position (20) and the side wall of the helmet (1). On the one hand, the hinged headband (2) can be folded from the user's ear position (20) towards the side wall of the helmet (1). On the other hand, the hinged hedband (2) can be unfolded from the side wall of the helmet (1) towards the user's ear position (20). The helmet (1), which includes the present headset, has a pair of headsets on its side walls. These headsets are mounted by means of respective setting supports (4).

Abstract: The present invention relates to a headset having a transmitter which is freely rotatable in 3D with respect to a handset housing of a headset. In a headset which includes a built-in handset housing which is electrically connected with a micro speaker and a printed circuit board, a connection line connected with an external terminal from the handset housing, a cushion ring coupled through the handset housing, a headband which is coupled to an upper cover and is putted on a user's head, and a microphone and transmitter connected with the upper cover for thereby transferring a certain sound wave, there is provided a transmitter connection structure of a headset which includes a socket formed in an outer side surface of the upper cover, the microphone formed in a lower portion of the socket in the handset housing, and a ball which is detachably engaged to the socket and is formed in an outer side surface of the transmitter.

Abstract: A headphone has a headband and two earpieces each connected to the headband so as to be pivotable relative thereto. When assuming a Cartesian coordinate system having a Z plane that is a symmetry plane of the headphone, having a Y plane that is positioned perpendicularly to the Z plane and extends through a center of the headband, and having an X plane that is positioned perpendicularly to the Z and Y planes at any desired height, a pivot axis is provided between the headband and the earpiece, respectively, wherein the pivot axis is positioned at an angle of at least 10° relative to the X, Y, and Z planes, respectively.

Abstract: A headphone device comprised of two separate units which hang on each ear by means of capturing the edge of the top and rear portions of the ear between a flexible ring and attached cloth. Each side is slid onto the ear and firmly held in place by the positioning of the ring, rather than compressive force, which is found in current headphone devices. The speaker element is connected to the cloth on the outer side of the device.

Abstract: An earpiece includes a housing, an arm having one or more projections extended from one end and rotatably engaged into the housing, and an arc having one end rotatably secured to the arm and rotatable relative to the arm. The arc includes a chamber, a casing is received in the chamber of the arc, and has a space to receive one or more batteries. A cap is engaged onto the casing, to retain the battery in the casing. The casing includes a latch detachably secured to the arc, to detachably secure the casing and the battery and the cap to the arc.

Abstract: A spring biased earmuff, having a flexible and generally ring-shaped frame (2) covered on an outer side and on an inner side by a fabric material (3), the frame being flexible between an open position wherein an ear may be inserted through an elongate hole (4) from the inner side of the earmuff such that the earmuff covers the ear on the outside and on the back side, and a snap on position wherein the frame exerts a biaising force for holding the earmuff to the ear, the frame having a frame front member (5) and a frame back member (6). An earphone (L) is supported by the frame, the ear phone being covered by the fabric material on the outer side of the earmuff. The earphone is removably attached to the frame (2) in a portion thereof, from where the earphone is supported outside the auditory canal of the ear in a user position of the ear muff. The frame exerts a biaising force on the earphone, away from the ear, in the hold position of the earmuff.

Abstract: A headphone accessory such as an outer casing for use in combination with a headphone system, which makes the headphone system more comfortable to wear, and serves various function suitable for long time wearing. The headphone accessory includes a sound field-forming member having a cylindrical part, which supports speaker units for reproducing sound from electrical signals or supports enclosures in which the speaker units are mounted, surrounds listener's ears and forms a space in which sound output from the speaker units or enclosures are collected into the listener's ears, and an outer casing formed of an elastic material, which can be separated from the circumference of the cylindrical part of the sound field-forming member and is directly in contact with the side of a listener's head around the ears.

Abstract: The invention relates to an arrangement for improving leak tolerance in an earpiece. The invention can be applied preferably in teleterminals, particularly in mobile stations. One idea of the invention is that an acoustic return path (314, 313, 311, 312, 320) is directed from the back part of the earpiece capsule (301) to a volume (307) between the earpiece (300) and the user's ear. By means of the solution according to the invention an optimum, controlled load is achieved particularly for low frequencies, such that a change in the volume (307) between the earpiece and the ear only has a minor effect on the volume and quality of the sensed sound. By means of the solution a good leak tolerance is achieved, even though the volume to be arranged behind the earpiece capsule is small.

Abstract: A headset has one or two earpieces, an adjustable microphone boom, and a means for securing the headset to the user. The earpiece includes a speaker element for generating sound and a sound funneling device for funneling sound from the speaker element to an ear canal of the user. The sound funneling device rests within a concha and at the entrance of the ear canal for funneling sound and for stabilizing the earpiece against an ear of the user. In the preferred embodiment, the sound funneling device includes a first end which is open-ended and facing the speaker element, and a second end which includes one or more apertures and rests at the entrance of the ear canal. The first end has a circumference which is larger than a circumference of the second end which focuses the sound from the speaker element to the ear canal. A speaker cushion is configured to fit around the speaker element and the sound funneling device and preferably provides a means for coupling the speaker element to the sound funneling device.

Abstract: A ear set for a cellular phone has a hollow body, an ear hook, an electric wire, a plug and a clip. The body has an earphone, a microphone, a pocket clip, a cap and a switch. One end of the pocket clip is attached to one end of the body. A protruding ball is mounted on the other end of the pocket clip above a hole through the body. The hole is located over a switch mounted inside the body so the protruding ball will contact and activate the switch when the pocket clip is pressed. This makes turning on or turning off the ear set easier and more convenient than pressing a discrete switch.

Abstract: The present invention is a headphone or earmuff unit that has two main parts. The first main part is the stationary enclosure, which fits over the ear of the user. This part also has holes in it for the passage of exterior sound. The second main part is the movable enclosure, which fits over the holes of the stationary enclosure. Both enclosures are padded for sound suppression. The two enclosures are tied together by a screw mechanism with a knob. When the knob is turned the enclosures separate. This allows exterior sound to enter the stationary enclosure, and thus the ear of the user, in a controlled manner.

Abstract: An earpiece for a headset, especially a headset incorporating active unwanted noise suppression, wherein the earshell incorporates a baffle plate carrying a sound drive and an ear cushion, whereby the baffle plate also carries an upstanding projection, more especially in the form of a sound transparent dome, which limits the extent to which the cushion can be compressed when the earpiece is pressed inwardly against the ear from its normally fitted condition.

Abstract: A communication headset includes at least one dome structure for fitting over a user's ear, the dome structure comprising a rigid outer housing defining an earpiece cavity. A support structure supports the at least one dome structure in place covering the user's ear. An audio transducer is positioned within the cavity for converting electrical signals into audible signals. A suspension structure supports the transducer within the cavity without any rigid connection between the transducer and the rigid outer housing. Flexible wiring is passed between the transducer and an external connector structure, the wiring for carrying the electrical signals to the transducer.

Abstract: A surround sound effect earphone, particularly an earphone structure that is designed for listening to modern music or films with multiple channel surround sound effects, in addition to conventional two-way channel music, comprising a front speaker and a rear speaker installed respectively at a front side and a rear side inside a left ear hood and a right ear hood of a headband earphone. The front and rear speakers are respectively connected with independent signal cords, which are then collected and connected to the earphone connector. The ear hood unit is optionally divided to include two units to accommodate the front and rear speakers, which can be turned outward or folded together. Or the front and rear speakers can be fixed on the ear hood units that are joined together, and by moving the positions of the ear hood units the user can change the distance between the front and the rear speakers.

Abstract: An earplug type earphone without impulse noise and surroundings blockade includes an earphone housing having a sound chamber inside thereof and a loudspeaker mounted therein, wherein a plurality of sound outlet meshes is provided on the front end of the earphone housing. A proper distance is given between the front end of the earphone housing and the loudspeaker mounted therein. A plurality of sound inlet meshes is provided on and encircled the earphone housing within the proper distance. The lower impulse noise output end with respect to two output ends of the loudspeaker is arranged to face to the sound outlet meshes. Therefore, the earphone can prevent not only the impulse noise directly impact to the middle ear but also the damage of the middle ear and the cause of conductive hearing loss.

Abstract: The present invention relates in general to ear muffs and in particular to an earmuff that are to be used in conjunction with headphones for portable radios, cassette players and the like. The outer surface of the earmuff is a solid shape resembling a standard earmuff while the inner side that faces the ear breaks apart into 2 C-shape donut halves to accommodate the placement of the headphone speaker. This design allows the earmuff to be positioned around the headphone speaker by means of the 2 C-shape donut halves and reconnect together around the headphone speaker in order to stabilize against the headphone and allow space for the headphone band and speaker wire between the connected respective halves of the donut. The earmuff makes use of the unique donut design to accommodate various styles of portable headphones while providing maximum insulation to the ear. The earmuffs are detachable and can be exchanged.

Abstract: A headphone includes two earphones attached to a headband by flexible adjusting bands for properly positioning and orienting the earphones with respect to ears of a wearer. Each earphone has a casing inside which a front-position speaker, a rear-position speaker, a middle-position speaker between the front-position and rear-position speakers and a lower-position speaker below the front-position, rear-position and middle-position speakers are arranged. The headband forms a casing inside which two top-position speakers are mounted, respectively associated with the earphones. The speakers are arranged to generate a multi-channel surrounding sound. The headphone also forms a chamber inside which a fan is fixed for generation of airflow to remove heat from the wearer.

Abstract: An in-the-ear earphone which is placed on a user's ear including a cushion and a shell body defining an internal cavity. The shell body has an extended portion shaped and sized to fit into a concha of the user's ear. The extended portion includes an aperture at an end thereof which aligns with the user's ear when the earphone is being worn by the user. The extended portion defines a passageway extending from the aperture to the internal cavity. The cushion covers at least part of the extended portion of the shell body and has an opening aligned with the aperture.

Abstract: An earmuff comprising a headpiece and a circuit. The headpiece supports the earmuff on the head of an individual. The circuit has an input device for receiving external sound energy and converting the external sound energy to electrical sound signals.

Abstract: An adjustable headphone comprising a pair of self-adjusting earpieces interconnected by a headpiece that includes a stiff resilient headband assembly and a soft flexible headstrap resting against a wearer's head. The headstrap is anchored at least at one end to a corresponding sliding block movably joined with the headband assembly having a bifurcated gear rack on its inner surface. The sliding block is equipped with at least one spring-loaded detent coming in contact with the gear rack. The headband assembly forms with at least one earpiece a hollow ball-and-socket joint where the spherical driver cup works as a ball part of the joint, and it mates to the arm's inner spherical surface which is a socket part of the joint. This joint provides the earpiece substantial angular motion in all directions thus enabling it to adjust to any ear shape.

Abstract: A headphone accessory such as an outer casing for use in combination with a headphone system, which makes the headphone system more comfortable to wear, and serves various function suitable for long time wearing. The headphone accessory includes a sound field-forming member having a cylindrical part, which supports speaker units for reproducing sound from electrical signals or supports enclosures in which the speaker units are mounted, surrounds listener's ears and forms a space in which sound output from the speaker units or enclosures are collected into the listener's ears, and an outer casing formed of an elastic material, which can be separated from the circumference of the cylindrical part of the sound field-forming member and is directly in contact with the side of a listener's head around the ears.

Abstract: To prevent the end of a tube that covers a band of a headphone apparatus from being exposed using a simple construction. Also, when a cord for transferring an audio signal or the like passes through the tube covering the band, to prevent the cord from becoming wound around the band. A headphone apparatus is equipped with a band 51 that is connected to left and right housings to which drivers are directly or indirectly attached and a tube that covers the band, and is constructed so that a through-hole 12b, into which the band and tube are inserted, is formed in each of the housings 12. The headphone apparatus includes a fixing members 13 that are inserted into ends 31 of the tube that have been inserted into the through-holes and press the ends of the band against the through-holes. Also, the tube 30 covering the band is constructed so that an internal space is partitioned in a lengthwise direction into two spaces 30b and 30c.

Abstract: A headset is described for use in connection with either mobile telephones, conventional landline telephones or personal computers. When used with wireless applications, the headset is housed in a generally elongated casing having an ear bud, having a speaker therein, and a battery pack extending therefrom which are used in conjunction with one another to secure the headset against a user's ear. The battery pack includes a lip that is designed to cradle the helix of a user's ear against the casing and is positioned distal of the ear bud such that the battery pack is located behind a user's ear when the headset is in its operating position. The battery pack and the ear bud are further positioned on the casing to counterbalance the end of the casing opposite the ear bud and to equally distribute the weight of the headset about the ear bud and prevent unnecessary movement of the headset about ear during operation.

Abstract: A hearing protector assembly has a muff and an ear-plug for hearing protection while allowing reception of audio communication. The muff has a receiver for audio signals, a modulation circuit, and a set of LEDs for transmitting the audio signal as a light signal. The ear-plug has a photovoltaic cell for receiving the light signals, a demodulator circuit, and a transducer for converting the received signal into an acoustic signal.

Abstract: In correspondence with the left and right external ears of a listener occupying a seat, a three dimensional sound field reproducing unit includes at least more than two speakers disposed on a headrest on the top of a backrest of the seat, and three dimensional signal processing means which converts an output signal from a sound source into a three dimensional sound field signal for supplying it to each of the speakers. Three dimensional sound field with high accuracy and fidelity is reproduced near the external ears of the listener.

Abstract: A headset has an earcup with front opening adjacent to an annular cushion formed with a plurality of openings facing the inside of the earcup that acoustically couples the earcup volume to the cushion volume. A driver is seated inside the earcup with a microphone adjacent to the driver. Active noise reducing circuitry intercouples the driver and microphone. An acoustic load that may comprise a wire mesh resistive cover and/or air mass adjacent the microphone is constructed and arranged to reduce the effect of resonances in the earcup volume.

Abstract: The present invention relates to a headphone with two ear cups each of which includes a loudspeaker or a plurality of multichannel speakers. Each speaker has its own individual sound chamber. In accordance with the feature of the speakers, they are installed at the front or rear sides of the individual sound chambers. Accordingly, each speaker is arranged inside the ear cup at different places or angles, thereby creating a clear sound field, protecting against the mixture of the sound waves and reducing the distortion. Beside, a well-distributed sound pressure is formed inside each individual sound chamber. Again, the surround sound effect is enhanced to achieve the original sound quality with high fidelity.

Abstract: A supra aural headphone including an earphone that includes a shell body, a cushion mounted on the shell to thereby define an internal cavity behind the cushion, and an acoustical driver mounted within the internal cavity to reproduce sound for the user when driven by an audio signal. The cushion has a passageway extending therethrough which acoustically connects the internal cavity with a user's ear cavity when the cushion is resting on the user's ear while being worn by the user. The internal cavity has a total volume that is larger than about 10 cubic centimeters, and the driver is mounted in such a way as to avoid obstructing the passageway.

Abstract: A headphone earpiece cover that the user may place over the earpiece to provide protection to the user from unknown and potentially harmful substances which may have been left on the head phone by a previous user. The outer perimeter of the sheet is adapted for a complete fit around the perimeter of a headphone earpiece such that the material substantially covers the earpiece.

Abstract: Active noise reduction headphones for audiometry where the earphone portion of said headphones has a cavity volume greater than 6 cc and including an acoustic-electric sensing means and an electro-acoustic transducing means which are used cooperatively and which has additional passive noise control means in the form of a circumaural seal around the ear for improving high frequency noise control performance, the headphone having a summing junction for combining the active noise reduction signal and an audiometry test signal.

Abstract: Headphones of various designs and types of construction, in particular also closed headphones, have been known for a long time. Headphones of the type mentioned above should have the desired frequency response in all frequency positions and, in particular, this frequency response should be as linear and uniform as possible in the lower frequency range in order to allow good transmission in low frequencies as well. It is the object of the invention to simplify the damping of the fundamental resonance of transducer systems, to improve quality and to save costs. Closed headphones with an acoustic transducer with a diaphragm system which separates a front volume from a rear volume, the rear volume being so small that it does not act as a spring in the range of the fundamental resonance of the transducer system.

Abstract: A headphone device according to the present invention includes an earpad (5) to be worn from the outside of the ear (15) on the head (14), and a housing (4) that is provided with a speaker unit as well as a fitting portion (8) on which the earpad (5) is fit. The earpad (5) comprise a cushion (9) and a facing (10) that covers the cushion (9). The earpad (5) can be attached to and detached from the housing (4). By means of making it possible to detach the facing (10) from the cushion (9) as well, a headphone device can be obtained, in which the earpad can be kept clean and that have improved hygiene.

Abstract: A reflection type of earphone comprises a pair of wires, a loudspeaker, and a reflection disk. The wires have an end thereof connecting with a sound signal output of a connected device and the other end thereof connects with the loudspeaker. The loudspeaker provides a sound output. The reflection disk faces to the sound output and has a plurality of bent strips to engage with the loudspeaker. The reflection disk is arranged to close to an acoustic meatus of an user such that the sound can be reflected by way of the reflection disk before entering the acoustic meatus to obtain a time postpone.

Abstract: In an apparatus (1) having a housing (2) and having an electroacoustic transducer (14) accommodated in the inner housing space (9) and having at least one passage (28, 29) which traverses a housing wall (6, 7) and which, together with the inner housing space (9) and the rear volume (25) of the transducer (14), which rear volume (25) is open to the inner housing space (9), forms an absorption-circuit resonator which causes a dip (31) in the sound pressure versus frequency response(27), a compensator (32) for the compensation of the dip (31) in the sound pressure versus frequency response (27) is provided and includes the housing (2) being provided with a plurality of ducts (33, 34, 35, 36; 41) traversing the housing (2), each duct forming an acoustic friction.

Abstract: A headphone includes a housing assembly having an electroacoustic transducer accommodated therein and an insertion hole defined therein. A winding mechanism is accommodated in the housing assembly for winding an input cord into the housing assembly. The winding mechanism includes a cord reel biased to wind the input cord therearound and an engagement member pivotally mounted in the housing assembly. When an input plug secured to one end of the input cord is inserted into the insertion hole, the input plug rotates the engagement member in a first direction, which in turn allows the cord reel to wind the input cord therearound. When the input plug is removed from the insertion hole, the engagement member rotates in a second direction counter to the first direction, allowing the input cord to be drawn out of the housing assembly and preventing the cord reel from winding the input cord therearound.

Abstract: An acoustic earmuff device is provided comprising a rigid cup, including inner and outer surfaces, a sound channel means disposed through said cup shaped portion, and a plate means operatively associated with said sound channel means, such that when the plate means is in a first orientation, sound attenuation through the plate means is greater than when the plate means is in a second orientation.

Abstract: A combination hat and headset device (the “hatset”) for improved comfort, hygiene, and consistent microphone placement. The headset is a combination of speaker(s) or microphone(s) for use in communicating with some other system, such as a telephone or computer system. The hat supports the weight of the headset and provides a buffer between the headset and the user. The hat is separable from the headset, so it can be washed independently of the headset. The hat and headset are easily separable, so the hat may be user-specific while the headset is shared among multiple users. The headset is specifically designed to be able to fit any head, with several independent adjustments available for variations in ear and mouth shape, size, and position, and head proportions. The microphone boom is designed to be temporarily movable away from the user's mouth, and then rapidly and accurately restored to a formerly selected position.

Abstract: A covering device for an earphone, especially for a plug earphone comprises two coverings and a covering connection. The respective covering provides a lateral face to face each other and a fitting groove is arranged to extend inward from the respective lateral face for accommodating the plug earphone. Both ends of the covering connection connect with the two coverings so that the covering device can be worn while in use.

Abstract: A headset assembly includes an electronics housing and a replaceable battery. The battery includes a recessed region for limiting contact between the battery housing and the electrical contacts of the electronics housing. The contacts of the battery include raised regions for concentrating the electrical contact regions between the battery and the electronics housing, and to further clean the electrical contacts of the electronics housing during slideable insertion of the battery into the electronics housing.