Abstract: The invention provides a water-proof housing for an electronic equipment. The water-proof housing, according to the invention, has built-in drainage to cope with penetration of liquid into the electronic equipment. The water-proof housing essentially includes a main body with a plurality of ventilation holes formed thereon. The housing also includes a plurality of drainpipes which each corresponds to one of the ventilation holes and a collecting hopper is formed at one end thereof. The drainpipes are mounted on an inner wall of the main body such that each of the collecting hoppers is disposed underneath the corresponding ventilation hole. Once liquid flows into the interior of the electronic equipment through the ventilation holes, the liquid is collected by the collecting hoppers and drained out of the electronic equipment from an outlet.

Abstract: An illuminating device in combination with a microphone boom attached to a helmet worn by an operator. The illumination device is actuated by either lip action or push button. The brightness of the selected illumination is changeable by means of a potentiometer thumbwheel. The illumination device provides one spot and three flood light emitting diodes which may individually or as a group switched on or off. The illumination device has a universal clamping system permitting attachment to single or double boom microphone.

Abstract: Certain embodiments of a noise canceling microphone with acoustically tuned ports are disclosed herein. In one aspect of the invention, the noise canceling microphone may comprise a housing, a transducer for converting received energy received into electrical signals, where the transducer is located in the housing, a front and rear sound pathways to a front and rear sound openings in the transducer, where the front and rear sound pathways may be located on opposite sides of the housing and may be displaced 180 degrees off a vertical axis. The noise canceling microphone may further comprising a boom for supporting the noise canceling microphone, where the boom may be deformed to place the noise canceling microphone near the mouth of the user. For example, the boom may be deformed to place the noise canceling microphone at least ten millimeters away from the edge of the mouth of the user.

Abstract: The invention relates to a rotary canister base comprising a loudspeaker, a drinking pipe and an air-intake pipe, wherein the loudspeaker serves as a communicating tool and the drinking pipe, which may be connected to a canteen, are all arranged within the confined space of the canister base. In addition, the drinking pipe, when unused, may be fixed onto the canister base. Most importantly, the air-intake pipe connected to the canister can be rotated and positioned at different angles so that the wearer may adjust the direction of the canister to avoid interference with the ambient space when fleeing for life.

Abstract: Disclosed is a hinge unit for a compact headset, which includes a speaker housing and a microphone housing, and which can be worn on the user's ear. The hinge unit comprising: a pair of opposed side hinge arms provided in the speaker housing at one side thereof; a central hinge arm provided in the microphone housing and assembled between the side hinge arms; and a current-carrying means having a pair of first current-carrying hinge members provided in the side hinge arms, and a pair of second current-carrying hinge members provided in the central hinge arm between the first current-carrying hinge members to slidingly surface contact with the first current-carrying hinge members, allowing the speaker housing and the microphone housing to be fully detached, both mechanically and electrically.

Abstract: An all-in-one headset worn on the user's head, comprises a head band, a first housing arranged at the head band, a communication unit having selectable at least two communication channels and selectable at least two communication modes, an operating panel mounted on the outside wall of the first housing for selecting one communication channel and one communication mode, an ear-speaker mounted on the inside wall of the first housing, a microphone, a second housing for housing the microphone, a boom member for supporting the second housing to the first housing, an indicating unit for indicating the indication indicative of the selected communication channel and the selected communication mode.

Abstract: The invention relates to a device (1) constructed as portable hook-on frame (2, 3, 4,) with folding work tops or panels (5, 6, 7) and is composed of a basic frame (2) with a telescopic suspension frame (3) with suspension hooks (4), in which out of the basic frame (2) nearly the bottom side a hinging foldable work top (5) and nearby the upper side a hinging expandable U-shaped document holder frame (6) with plate (7) is mounted, in which the whole is especially useable for technicians, whom execute work on measurement and control cabinets and such.

Abstract: A head worn entertainment and communication device (10, 110) including at least a first ear assembly (11, 112) which further includes a transducer (19, 119) in communication with a radio receiver housed within an equipment module (27, 127). In particular forms the ear assembly includes a lower limb (20, 120) and an upper limb (22, 122) defining an ear containing space (23, 123) therebetween. In other particular forms a first ear assembly (11) is interconnected with a second ear assembly (12) by means of an interconnect device (13).

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: There is provided a microphone apparatus with an adjusting mechanism that prevents wind noise generated at a sound absorbing hole from perceptively inputted in the structure having a microphone built-in at the back of a panel with a sound absorbing hole.

Abstract: A microphone which has a highly reliable microphone arm, can be reduced in weight and size, and is constituted by a pipe microphone for narration having good acoustic characteristics includes a voice receiving opening formed in the distal end portion of a hollow microphone arm extending from a microphone main body and having flexibility, a microphone unit arranged in the microphone main body, a ventilation hole formed in the microphone arm on the microphone main body side, wherein the ventilation hole is clogged with an unwoven fabric serving as a ventilation resistance member.

Abstract: A wireless personal communication system includes an earpiece, worn in or behind the ear, that communicates wirelessly with a remote processor unit (RPU) worn at the neck. The RPU is a wearable computer in the form of a necklace, neck ribbon, collar or other flat, flexible article that may be worn under clothing to hide it from view. The close proximity of the earpiece to the RPU, combined with the large antenna aperture area available in this RPU form, enables the use of radar technology to implement a two-way wireless link between the earpiece and RPU, and also allows earpiece operating power to be beamed from the RPU. The resulting size and cost reductions in both the earpiece and RPU allow the manufacture of disposable hearing aids and, when the RPU is equipped with secondary wireless link circuitry, cellular telephones and pagers.

Abstract: A communication helmet having an enhanced noise reduction effect. The communication helmet incorporates a microphone disposed in the vicinity of the mouth of the speaker wearing the helmet. The microphone is an optical microphone comprising a diaphragm (31) vibrating with sound pressure, a case (40) containing the diaphragm (31) and having a first opening (38) and a second opening (39) open in symmetric positions and facing the diaphragm (31), a light source (32) for projecting a light beam to the diaphragm (31), and a photodetector (35) receiving part of the reflected light of the light beam projected to the diaphragm (31) and outputting a signal corresponding to the vibration of the diaphragm (31). The optical microphone is fixed to a fixing base (250) at a predetermined angle so that the incoming sound wave may uniformly enter the first opening (38) and the second opening (39).

Abstract: A microphone mounting structure for mounting a microphone to a respiratory mask and/or bubble suit through a hole therein. The microphone mounting structure is thus able to convert a conventional respiratory mask and/or bubble suit into a sound amplifying mask and/or bubble suit. The microphone mounting structure comprises a tubular plug and a tubular locking mechanism. The tubular plug has a closed end, an open end and a central portion disposed therebetween. The closed end of the tubular plug has a larger outer diameter than an outer diameter of the central portion. The open end has a plurality of resilient fingers defined by slots in the open end, the resilient fingers having finger tips which project radially outwardly with respect to the tubular plug. The microphone is dimensioned so as to fit coaxially inside the is tubular plug, and preferably, a grommet is provided around the microphone.

Abstract: A communication helmet having an enhanced noise reduction effect. The communication helmet incorporates a microphone disposed in the vicinity of the mouth of the speaker wearing the helmet. The microphone is an optical microphone comprising a diaphragm (31) vibrating with sound pressure, a case (40) containing the diaphragm (31) and having a first opening (38) and a second opening (39) open in symmetric positions and facing the diaphragm (31), a light source (32) for projecting a light beam to the diaphragm (31), and a photodetector (35) receiving part of the reflected light of the light beam projected to the diaphragm (31) and outputting a signal corresponding to the vibration of the diaphragm (31). The optical microphone is fixed to a fixing base (250) at a predetermined angle so that the incoming sound wave may uniformly enter the first opening (38) and the second opening (39).

Abstract: In order to equalize the pressure between the interior of an unit accommodating chamber and the outside of a mike casing without reducing a waterproof performance and an acoustic characteristic, there is provided a waterproof type microphone, which includes a mike casing 11 provided with an unit accommodating chamber having a sound receiving opening portion 141; a mike unit accommodated in the unit accommodating chamber 14; and a waterproof membrane 19 airtightly mounted on the sound receiving opening portion 141; the waterproof microphone further including an venting hole 21 formed in the mike casing 11 to cause the unit accommodating chamber to be communicated with outside of the mike casing 11 and a pressure equalizing membrane 22 mounted on the venting hole 21.

Abstract: A collar band supports a boom-mounted microphone that may be selectively positioned on either the right or left side of the user's head. Adjustable neck pads are mounted to the opposite ends of the collar band for added comfort. The collar band may be resized to fit the neck of the user. The collar microphone may be worn for extended periods of time without becoming uncomfortable. A cradle assembly conveniently supports and stores the microphone when it is not in use.

Abstract: A device is provided for reducing noise in the human ear having a microphone which picks up the noise and a reproduction transducer to which a noise compensation signal is fed via a compensation circuit which is connected with the microphone. The microphone in the device has a balancing element which is arranged in front of the sound entrance opening of the microphone. The balancing element defines a quasi-constant sound reflection and accordingly reduces individual reflection effects caused by the fundamental diversity of the external region of the human ear and improves the use of the entire device and increases the effectiveness of the noise compensation overall. In this way, headphones/hearing protectors can also be designed as acoustically closed systems which are designed so as to rest on the ear.

Abstract: A self-contained helmet communication system is arranged to support oral communication by sending sound waves to and receiving sound waves from an unequipped person positioned near a helmet wearer. The helmet communication system includes a protective helmet having an external microphone and speaker mounted on the helmet. The external microphone, responsive to sound waves external to the helmet, provides signals that are coupled to an internal speaker or earphone to provide a representation of the external sound waves to the wearer. An internal microphone, which is responsive to speech of the helmet wearer, provides signals representative of the helmet wearer's speech that are coupled to an external speaker. Additionally included is a signal coupler with dual audio amplifier channels to couple signals representative of external sound waves from the external microphone to the internal speaker, and to couple signals representative of speech of the wearer from the internal microphone to the external speaker.

Abstract: A head-phone having a case member storing therein a headphone unit, wherein a coating film containing a light discolor pigment to be discolored by irradiation of sun light is provided on the whole surface or a predetermined surface of the case member.

Abstract: An amplification system for use in conjunction with a device which precludes readily access to a mouth of a user is provided. Such system includes a microphone for receiving audio signals from an ear of a user when the user vocalizes. Next provided is a cord having a first end connected to the microphone and a second end with a jack formed thereon. Also included is an amplifier housing having a rectilinear configuration with a square front face, a square rear face, a rectangular top face, a rectangular bottom face, and a pair of rectangular side faces coupled therebetween. A spring biased rectangular clip is included having a first end hingably coupled to the rear face of the housing adjacent the top face thereof. The clip has an unbiased orientation with a second end abutting the rear face of the housing and a second orientation wherein the second end of the clip is distanced from the housing. An input port is adapted to releasably receive the jack of the coiled cord and further receive the audio signals.