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JP2010538511A |
A method of underwater communication between a link initiator and a link receptor, by transmitting a link acquisition waveform from the initiator to the receptor, and establishing communications channel parameters from such a received wa...
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JP4593054B2 |
The invention concerns an installation with piezoelectric element for transmitting or receiving ultrasonic waves in a structure, the electrodes ( 8 ) of said element ( 7 ) being connected, as the case may be, to a powering circuit produc...
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JP2010534995A |
A method and apparatus for communicating a sound wave is provided. The apparatus includes: a sound wave converter converting a sound wave signal transmitted from a counter apparatus through the human body into an electrical signal when t...
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JP4560858B2 |
A transmitting/receiving device and a transmitting/receiving method for transmitting and receiving an acoustic signal through infrared radiation or the like are obtained wherein noise and interruption of the sound due to overmodulation o...
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JP4545234B1 |
Disclosed is a sending device capable of making it difficult for people to perceive sound waves for transmitting information in an environment where information is transmitted in the form of sound waves. Specifically disclosed is a sendi...
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JP4528365B1 |
[PROBLEM] In environments permitting information to be conveyed as acoustic waves, to provide a transmitter that is capable of causing acoustic waves that convey information to be not easily perceived by the human ear. [SOLUTION MEANS] T...
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JP2010527176A |
Provided are a human body sound transmission system and a method using single sound source. The human body sound transmission system includes a first transmission block for transmitting a combined signal of a first high frequency signal ...
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JP2010166129A |
To transmit data with relatively high reliability by utilizing medium vibrations not using electromagnetic waves. When transmitting information from the information transmitter 200 to the information receivers 100a and 100b positioned ar...
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JP2010139270A |
To reduce the restrictions on the travel region of an underwater navigation object. The underwater navigation object 1 can move underwater by power which the object itself possesses and includes a side scan sonar 10C, or the like, for co...
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JP4486922B2 |
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JP4478851B2 |
An ultrasonic coding modem for digital network communication comprises a transmitting device having a first piezoelectric substrate, and a receiving device having a second piezoelectric substrate. If a message digital-signal is applied t...
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JP2010514322A |
A method for isolating ultrasound transmit beams and reducing cross-transmit beam interference in a multi-beam system involves transmitting a first ultrasound beam at a first and second positive angle and transmitting a second ultrasound...
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JP2010081248A |
To provide an acoustic communication system with high reliability and high speed.A plurality of PN signals are mixed with a musical sound signal, and released. When a volume level of the musical sound signal is low, a phase of each of PN...
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JP2010074398A |
To perform OFDM demodulation without requiring symbol synchronization.An OFDM modulation/demodulation method in a transmission system for transmitting data from a transmission source to a transmission destination by OFDM modulation/demod...
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JP2010061206A |
To provide a technology for converting bar code data into a voice signal, and to provide a method for improving a recognition technology by transmitting/receiving the data as an ultrasonic wave, and maintaining its interchangeability wit...
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JP2010060520A |
To provide a modulating/demodulating method for ultrasonic waves, improving a noise-proof property, and to provide a distance detecting method and a communication method.Ultrasonic wave is modulated by transmitting a plurality of ultraso...
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JP2010057187A |
To simplify the configuration of an ultrasonic signal communication apparatus.An ultrasonic signal communication apparatus 310A includes: an ultrasonic oscillation unit 318A having at least two resonance frequencies according to oscillat...
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JP2010050504A |
To provide a communication system for a diver, stabilizing communication quality, and also to provide a radio relay apparatus.The communication system for a diver has: an information transmission device (diving computers 1A, 1B) attached...
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JP2010051039A |
To provide a parametric audio system that includes a carrier frequency sufficiently higher than a carrier frequency of a conventional system, and achieves reduced distortion and improved efficiency.Ultrasonic wave signals are used to tra...
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JP2010035135A |
To simplify the constitution of an ultrasonic signal transmitter-receiver.The ultrasonic signal transmitter-receiver 410a includes: an ultrasonic vibration part 318A having at least two resonance frequencies according to the vibration mo...
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JP4411136B2 |
Provided is a sonar transmitter in which the structure is simplified and the power loss is decreased. A sonar transmitter comprises: a load unit having a transformer constituted with a primary wiring and a secondary wiring, and a wave tr...
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JP2010016625A |
To provide a modulating device, demodulating device, information transmission system, modulating method and demodulating method which have high compression Codec resistance while suppressing a deterioration in acoustic feeling by light o...
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JP2010012969A |
To improve convenience when two or more people enjoy diving.The information transmission device for divers which is worn by a diver and to which information to be given to the diver is transmitted, has a display portion, a receiving port...
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JP2010011282A |
To provide a modulation apparatus, demodulation apparatus, information transfer system, modulation method and demodulation method which remarkably reduce noise through simple processing and have little restrictions in communication.In th...
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JP4398416B2 |
A modulation device of the present invention has: a modulation unit (51) for modulating a carrier (42) in an audible sound range by an encoded transmission signal (3) to generate a modulated signal; a masker sound generation unit (44) fo...
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JP4398590B2 |
A process and system for the transfer of information, which is suitable in particular for digital information transfer. At least one information signal is created, consisting of at least one reference component and at least one informati...
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JP4398494B2 |
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JP2009296617A |
To transmit information with audible sound waves based on a level that is not unpleasant to the hearing sense of human beings and to improve the bit rate of transmission information.A modulation apparatus 4B includes: a modulation sectio...
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JP4386282B2 |
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JP2009272980A |
To provide a submarine communication apparatus which efficiently consumes power.The communication apparatus A(10A) communicating with an opposite-side station via ultrasonic waves includes: a transmission section 14 which generates a com...
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JP2009273003A |
To transmit/receive information without disturbing the listening of sound.A modulation apparatus generates a sound signal of a waveform obtained by combining a plurality of frequency components. When superimposing information on the soun...
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JP4361575B2 |
An object is to provide a modulation device, a demodulation device, and a transmission system and acoustic signal transmission method using them which can carry out a synchronization process for data signals without using a carrier frequ...
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JP2009246788A |
To provide a modulation apparatus which remarkably reduces noise through simple processing and reduces restrictions during communication.In an information transfer system, a component of an input audio signal Sa is eliminated by a modula...
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JP4347714B2 |
To provide an ultrasonic transmission device capable of efficiently transmitting an ultrasonic wave generated from a large-diametric vibrator to a flexible transmission line (fine diameter fiber). In the transmission device 10, the base ...
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JP4343830B2 |
The invention relates to a method of generating a predetermined objective wave field in a medium using a first network of transducers T1-Tn). The inventive method consists in first using each transducer i of the first network to emit an ...
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JP4339793B2 |
Apparatus and method are disclosed for data communication using sound. Generally, an apparatus for transmitting digital data comprises a data coder configured to convert the digital data into one or more types of sound parameters, and a ...
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JP2009225423A |
To achieve downsizing, and reduction in weight and cost of a transmission device and a receiving device.The wireless communication system 1 is provided with a wireless transmission device 10 and a wireless receiving device 50. The wirele...
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JP2009224893A |
To easily and safely authenticate the propriety of a user using a mobile terminal and to prevent unauthorized utilization by a third person in an electric field communication system using electric field communication of transmitting and ...
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JP4333475B2 |
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JP4326850B2 |
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JP2009200772A |
To provide a communication apparatus for efficiently using limited frequencies usable for underwater communication.The underwater communication apparatus A(10A) includes: an electromagnetic wave transmission unit 20 for transmitting a fi...
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JP4308469B2 |
The invention concerns a communication system between a portable unit (1), such as a watch, and a communication terminal (2) such as a personal computer, characterised in that the communication terminal (2) comprises at least means for t...
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JP4257402B2 |
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JP4238264B2 |
Upper transmitter 141 converts an electric signal transmitted from upper electronic device 101 into an ultrasonic signal and transmits the ultrasonic signal. First communication medium 146 transports the ultrasonic signal to lower receiv...
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JP2009003966A |
To provide a method and a system for accessing information and/or data available on a wide area computer network (100), such as the Internet.A first modulated acoustic signal (A) is transmitted to a group of potential users each provided...
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JP4205977B2 |
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JP4205952B2 |
For digital underwater transmission an information sequence ( 17 ) of digital bits is partitioned into a succession of symbols each comprising n bits where n is equal to or greater than one (2n potential symbols), each symbol ( 19 ) is r...
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JP4197872B2 |
The positioning system (50) attaches to the lifting wire (42) and comprises a main module (51) and a counter module (52), each provided with thrusters (56) to control the positioning of an attached load. An attached processing system tak...
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JP2008259191A |
To provide a signaling system which can be used to update the prices of goods which are electronically displayed on supermarket shelves.The signaling system comprises a first signaling device having an input terminal for receiving electr...
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JP4164539B2 |
An ultrasonic measuring method includes the steps of: receiving ultrasonic waves, which have been transmitted by a spread spectrum technique using mutually different codes, at first and second receivers, thereby generating first and seco...
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