Abstract: An insertion device includes a stent and a plurality of sealing elements where each sealing element is operatively attached to the stent and an earclip retention system.

Abstract: The stenomask adapter device enables the hands-free use of an oral stenomask. In one embodiment, a stenography stenomask is inserted into the stenomask adapter device. The stenomask adapter device provides a stenomask adapter body and two arms. The arms pivotally attach to the stenomask adapter body via a fastener. A stenomask inserts into the mouth located at the front of the adapter body. A lip extending inwards secures the stenomask in the mouth. A seal is placed over an attachment head that secures the seal to the adapter body.

Abstract: A helmet with an airbag assembly coupled to the shell of the helmet. The airbag assembly includes an airbag and an inflation device. The inflation device is configured to at least partially inflate the airbag upon deployment of the airbag assembly. The helmet also includes a processing circuit disposed at least partially within the shell. The processing circuit is configured to receive helmet data regarding a second helmet, transmit deployment data regarding inflation of the airbag assembly, and control operation of the inflation device to inflate the airbag based on the helmet data.

Abstract: A closed audio circuit is disclosed with function of eavesdropping prevention and audio clarity enhancement. The closed audio circuit includes a plurality of user equipment (UEs) and an audio signal combiner for a group audio communication session. The UEs and the audio signal combiner form a closed audio circuit allowing a user to target another user to create a private conversation to prevent eavesdropping. The UEs receive user audio input signals and send the audio input signals to the audio signal combiner. The audio signal combiner receives the audio input signals from each UE and transfer desired mixed audio output signals to each of the UE.

Abstract: The adjustable mouth shield device provides an adjustably fitted mouth shield with adjustable headband for secure fit. The adjustable headband is fastened to the padded earpiece. The straight first extension from the earpiece is angled downwardly and forwardly to terminate in a swivel joint providing almost 360 degrees of swivel. The second extension is arced both downwardly and forwardly. The u-shaped mouthpiece is fitted to the adjustable spring mount for horizontal pivot of the mouthpiece. The mouthpiece may, by virtue of the swivel joint and the spring mount, be moved completely away from a user's mouth and, in turn, pivoted and swiveled to be directly in front of the user's mouth. The inward curves at the distal end of the mouthpiece aid in sliding on the disposable pads that shield a user from objects, foods and other materials.

Abstract: A sound sensing apparatus such as a communication headset uses a microphone and an acoustic valve controlled by a movable boom to operate in at least a compact and an extended-boom mode, with the valve variously coupling the microphone to different openings on the boom or the main body functioning as the acoustic sensing point.

Abstract: A hands-free attachment for a radio telephone, comprising a transducer connectable to the receiver to generate sound waves representing sound signals received by the receiver, and electrically non-conductive means for conveying the sound waves from the transducer to an ear-piece locatable in or adjacent to the user's ear, the system preferably includes a remote microphone.

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 kit for assembling modular support structures is described. The kit comprises structural members and joining means. The joining means further comprise straight members, angle members and "T"-shaped members. A variety of different support structures of different shapes and sizes can be assembled by inserting the ends of the structural members into the ends of the various joining means. Furthermore, angle members may be arranged to include wheeled means, allowing for the construction of mobile support structures.

Abstract: An anti-eavesdropping device is provided which consists of a first structure for containing sound waves produced by a first person. This first structure includes a sound attenuating breathing device. This first structure includes a first mechanism for converting sound waves into electric waves, which are then transferred to a second structure which is for forming an acoustic seal about the ears of a second person. This second structure includes a second mechanism for converting the electric waves back to the sound waves. Because the device enables two or more people to engage in conversation, in such a way that no sound can escape into the environment to be detected in any way, by the human ear or by any kind of eavesdropping device utilizing direct or indirect interception of sound waves (such as microphones or vibration--detection equipment utilizing laser beams), the device can be used to produce confidential communications in the presence of eavesdroppers and eavesdropping equipment.

Abstract: An acoustical voice tube, comprising an acoustical hollow upper piece and an acoustical hollow lower piece in hinged connection permits voice or sound tube positioning over a large area without changing the sound characteristics.

Abstract: A new voice tube assembly for post-auricle headsets is disclosed. In one aspect of the invention, first and second curved, rigid tubular sections are employed to connect a flexible main voice tube section with the top of a post-auricle capsule containing a microphone and a receiver. The curved, rigid tubing sections are rotatable to maximize positional flexibility. In a second aspect of the invention, a shaping wire is included throughout a substantial portion of the length of the main voice tube section. The shaping wire is employed in order to permit the use of thinner and lighter material for the main voice tube section, and to facilitate shaping of the main voice tube section to the geometry of the wearer's face and locating of the open end of the main voice tube section adjacent the wearer's mouth.

Abstract: Direct voice communication with simultaneous two-way transmission is possible with a communicator having the earpiece of the communicator at one station connected by flexible plastic tubing to the mouthpiece of a communicator at another station, the two stations being connected by two independent voice channel tubes. The provision of cross-connected channels between the mouthpiece and the earpiece of two communicating stations permits normal conversation with simultaneous two-way transmission to occur in the manner of telephonic transmission rather than requiring sequentially alternating transmission between stations as necessary in using single voice tube communicators where destructive interference occurs between sound waves transmitted simultaneously in opposite directions in a voice tube.

Abstract: A crash helmet for use by motorcycle drivers or riders has a rigid shell; a first flexible acoustic tube a first section of which extends into and has a bell horn in the region of the mouth-protecting part of the shell, and a second section extending from the shell through the opening in the neck-surrounding part of the shell; a second flexible acoustic tube a first section of which extends into and has a sound-intensifying terminal portion in the region of an ear-protecting part of the shell, and a second section extending outwardly through the aforementioned opening of the shell; first and second additional flexible acoustic tubes respectively corresponding to the second and first tubes and having first sections installed in the shell of a second crash helmet; and a quick-release coupling respectively connecting the second sections of the first and second tubes with the second sections of the second and first additional tubes.

Abstract: An ear protecting device for protecting a wearer from annoying and/or damaging noise levels. The device is comprised of a connecting member and a pair of muffs suitable for covering a wearer's ears. The muffs are suspended from opposite portions of the connecting member. The muffs are permeable to water vapor. Each said muff is at least partially porous. Each said muff has a specific airflow resistance of at least 15,000 SI rayls. Each said muff has a permeance of at least 2 metric perms.

Abstract: A detachable, voice transmit-only headset is all-acoustic and comprises means for mounting the headset on the head of the user and a flexible transmitter tube supported by the mounting means. One end of the tube is adapted for adjustably positioning near the mouth of the user for conducting sound therefrom and the other end terminates in a coupling adapted to releasably connect to electronic communications equipment remote from the user's head.

Abstract: The detachable communications headset described herein is all acoustic, comprising support means for a transmitter tube and a receiver tube and for supporting the headset on the user's head. The transmitter and receiver tubes are detachably coupled to communications equipment remote from the headset. All electronic components necessary for radio and telephone communications are remote from the user's head.

Abstract: The detachable communications headset described herein is all acoustic, comprising support means for coupling a mouthpiece tube to a transmitter tube and a receiver tube to an ear tube and for supporting the headset on the user's head. All electronic components necessary for radio and telephone communications are remote from the user's head.