Matches 1 - 50 out of 88 1 2 >
Match Document Document Title
7016508 Audio apparatus  
An audio apparatus comprising a modulator 12 for modulating a first ultrasonic signal 29 with an audio signal to provide a second ultrasonic signal 30 ; a transducer 15 for converting the...
6769508 Underwater audio system  
An underwater audio system includes a framing having at least one speaker mounted thereon and at least one upwardly extending arm member. The arm member(s) are arranged to slide under the strap of...
6735149 Device forming a snorkel mouthpiece or diving regulator  
A device forming a mouthpiece for a snorkel or diving regulator, adapted to fit in the mouth of a diver or swimming and comprising a body provided with an air intake and extended by two lateral...
6426919 Portable and hand-held device for making humanly audible sounds responsive to the detecting of ultrasonic sounds  
A portable and hand-held device for making humanly audible sounds responsive to the detecting of ultrasonic sounds. The device includes a hand-held housing and circuitry that is contained in the...
5889730 Underwater audio communication system using bone conducted sound  
An underwater audio communication system to be worn by a diver is connected with and carried by a conventional face mask such that bone conduction occurs through the mastoid bone of the diver...
5825718 Underwater communication apparatus and underwater microphone, and closed-type sound converter  
An underwater communication apparatus is provided which enables safe and clear speech transmission. An exhalation pipe which defines an acoustic space for communicating with an interior space of a...
5661699 Acoustic communication system  
An acoustic communication system comprises: a voice processing circuit wh generates a first signal representing a voice message; a noise sensor channel which generates a second signal in response...
5586176 Integrated wireless communication system  
A wireless communication system, for example for underwater divers, wherein the receiver portion and the transmitter portion of the system are mounted at the user's ear and mouth, respectively, by...
5579284 Scuba diving voice and communication system using bone conducted sound  
An underwater scuba diver communication system is disclosed which is comprised of an oral bone conduction mouthpiece based sound transmission and conduction device, an oral--mouthpiece based...
5555533 Control system for diver VOX/PTT communication system  
A control system which enables a diver to electronically switch between voice operated (VOX) operation and push-to-talk (PTT) operation by actuation of the existing momentary contact PTT switch...
5539705 Ultrasonic speech translator and communications system  
A wireless communication system undetectable by radio frequency methods for converting audio signals, including human voice, to electronic signals in the ultrasonic frequency range, transmitting...
5493079 Vocal communication snorkel  
A vocal communication snorkel includes a hollow body having a breather tube, adapted to extend above the water, coupled thereto and a mouthpiece adapted to be held by the lips of a snorkeler. The...
5455842 Method and apparatus for underwater communication  
Waterborne acoustic signals are received and processed into electrical driver signals to energize a transducer held in selectively controllable vibration-transmitting engagement with a tooth of an...
5222050 Water-resistant transducer housing with hydrophobic vent  
An immersion-resistant housing adapted to receive a vibratable diaphragm spanning the interior of the housing to divide the housing into first and second chambers includes a first port...
5159580 Acoustic transducer for sending and receiving acoustic communication signals  
A uniquely designed acoustic transducer comprising a stack of piezoceramic elements (other piezoelectric materials may be used) mounted upon a tuned, shaped transmit/receive head made of hardened...
5136555 Integrated diver face mask and ultrasound underwater voice communication apparatus  
A novel totally integrated divers face mask and ultrasound underwater voice communication apparatus having integral transducer-transmit-receive-power source enclosures of low profile, flexible...
5060308 Firefighters mask communication system  
A communication system for attachment to a standard type of firefighter's face mask. Generally speaking, the communication system is mounted on opposite sides of the glass/plastic lens portion...
4980926 Voice communication unit  
A voice communication unit is mounted with respect to a full face mask to allow the wearer of the mask to communicate with others. An optical transmitter positioned inside the mask responds to the...
4926398 Pressure compensated communication system  
The present invention provides a pressure compensated communication system having at least one audio transducer, the pressure compensated communication system comprising a fluid tight housing for...
4852682 Underwater voice communicator  
An underwater communicator comprising a transmitter for transmitting acoustical energy between mediums having differing impedance. The transmitter includes first and second ends. The first end is...
4839871 Underwater communication device  
An underwater speaker system having a pressure equalization system enabling the speaker to operate in its intended fashion over a wide range of water depths, e.g. from two feet up to sixty feet....
4799263 Speaking and hearing system for breathing apparatus  
A speaking and hearing system for respirators, where the apparatus wearer is connected to a respiratory gas supply independent of the ambient air. A suppression, independent of acoustic signals, of...
4780900 Radiogenic tube radiological device with magnetic bearings  
A radiological device is provided of the type comprising a radiogenic tube with magnetic bearings, said radiogenic tube being contained in a sheath as well as electronic means for controlling said...
4679177 Underwater communication system  
An underwater communication system of the present invention comprises a transmitter including message inputting means having keys, each being assigned to each word, code converting means for...
4563758 Underwater communicator  
An underwater communicator device (10) is disclosed which permits acoustic communication with another diver by use of a voice synthesizer (42) cooperating with an acoustic transducer (40). A...
4527657 Tapered tube impedance matching underwater voice communicator with bubble silencer  
An underwater voice communicator in which the preferred embodiment comprises a pair of tapered tubes in communication with a diver's mouth. The tubes are constructed of a material having a sound...
4456797 Submersible personal stereo system  
A waterproof pouch to house a personal stereo cassette tape player or radio electrically connected by means of a retractile cable to a pair of waterproof headphones. The waterproof pouch has a...
4432079 Synchronous/asynchronous independent single sideband acoustic telemetry  
An undersea communications system provides for improved data transmission pabilities. Two separate sources of information respectively modulate the upper and the lower sidebands of an acoustic...
4418404 Single-sideband acoustic telemetry  
An apparatus and method of transmitting and receiving information underwa assure improved performance characteristics. Modulating a carrier and appropriately filtering it allows the transmission of...
4342104 Helium-speech communication  
The invention relates to a novel helium-speech unscrambler which can be located at a diver's location, and enables the helium-speech voiced by the diver to be subjected to waveform time expansion...
4336537 Bi-directional underwater communication system  
A bi-directional underwater communication system provides a submerged operator with the capability to communicate with a surface site. A face-mask-mounted microphone and an earphone are connected...
4276624 Acoustic transmission system  
An acoustic transmission system for a gaseous or liquid transmission medium, in which the transmitting apparatus double-sideband amplitude modulates a carrier with the signal to be transmitted, the...
4276623 Underwater audio intercommunication system  
Audio communications between divers or between a diver and a surface craft are made without unduly burdening the divers. Diver carried throat microphones pass vocal signals to a...
4203160 Submarine communication  
2. A method by which a submarine while deeply submerged in the sea may receive a message from a remote station without disclosing to others the position of the submarine, which comprises...
4183422 Underwater communications device  
A communications device for use under water by a human speaker. A tubular base member has a mouthpiece located at one open end thereof and an inflatable air bag mounted about another open end...
4154981 Telephone system for diver communication  
A telephone system for use by divers employing demand breathing apparatus. ounds picked up by each diver's microphone are processed by selective filtering, amplification, rectification and...
4123622 Protective cover for sound transducers located in face masks of divers  
A moisture protective housing for a sound transducer located inside the face mask of a diver which face mask is vented to a breathing apparatus, such as a scuba tank with regulator, to maintain the...
4096466 Underwater switching  
Underwater switching of electrical apparatus is accomplished by providing two terminals at the exterior surface of a unit to be immersed in water so that a conductive bridge is formed between the...
4071110 Underwater voice communicator  
The communicator comprises a casing with extending bits for clenching between a diver's teeth in a manner such that the diver can speak into an air chamber within the casing. An acoustical...
4039999 Communication system  
Amplitude modulation systems for underwater communication have a number of disadvantages. For example, with a number of divers attempting to communicate simultaneously, intolerable cross-talk...
3950617 Helium speech unscrambler with pitch synchronization  
A pitch synchronized helium speech unscrambler is disclosed as including a air of bucket brigade analog delay lines which are timely and rapidly loaded with the electrical signal equivalents of...
3875336 Periodic signal detector  
A periodic signal detector is disclosed that may be incorporated in a voice actuated communication system. It comprises a series connected low pass filter, limiter, and bistable multivibrator, the...
3867715 Underwater communications system  
The communication method and system for use in reverberant environments iudes a transmission of the real time communication message followed by a transmission of the same message recorded and...
3828887 UNDERWATER SPEAKING DEVICE  
An underwater speaking tube employs a free-flooding speaking section which fits over the speaker's mouth. A venting tube to expel water is separated by a sound-transferring diaphragm from a sound...
3813687 INSTANT REPLAY HELIUM SPEECH UNSCRAMBLER USING SLOWED TAPE FOR CORRECTION  
The helium speech processing device employs a cassette tape recording system which makes a sentence-by-sentence or phrase-by-phrase recording of the speech of a helium gas breathing diver and...
3790891 RECEIVER FOR A FREQUENCY-MODULATED ELECTRO-ACOUSTICAL SIGNAL HAVING SQUELCH MEANS FOR SUPPRESSING NOISE WHEN NO SIGNAL IS COMING THROUGH THE RECEIVER  
The invention relates to a receiver for a frequency-modulated electro-acoustical signal system and more particularly to a compression wave transmission system having a receiver which is adapted to...
3789353 DIVER COMMUNICATION SYSTEM  
An underwater diver communication system is disclosed as including a voice ctuated transmitter for broadcasting speech signals throughout an ambient subaqueous environmental medium combined with a...
3497623 SECURE PERSONAL CONVERSATION USING TIME BLANKED NOISE GENERATOR  
3495209 UNDERWATER COMMUNICATIONS SYSTEM  
3469231 UNDERWATER LOCATING AND INTERCOMMUNICATING DEVICE,PARTICULARLY FOR FREE-SWIMMING DIVERS  
Matches 1 - 50 out of 88 1 2 >