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JP4100416B2 |
To provide a position detection system which is easily executed and capable of achieving low cost. The position detection system is provided with a sound source unit 1, provided with a sound source capable of transmitting ultrasonic wave...
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JP2008128911A |
To provide a vibration detector capable of outputting a digital vibration detection signal by simple constitution.This vibration detector is constituted to include a modulator using a phase difference change between a reference light and...
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JP2008128910A |
To provide a vibration detector capable of improving the detection sensitivity, when optically carrying out digital vibration detection.A laser beam Lout from a laser light source 10 is split into two light paths OP1 and OP2 in an interf...
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JP2008124738A |
To provide a speaker device which is reduced in size in the depth direction to reduce thickness and reproduces high frequency bands so that wide-band sounds can be reproduced.The speaker device 10 has a diaphragm 40, a voice coil 60 prov...
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JP4076872B2 |
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JP4076873B2 |
To provide an ultrasonic receiving apparatus which can reduce changes in detecting the sensitivity of a ultrasonic wave caused by changes in temperature or the like, and the variation of the detecting sensitivity due to a position of an ...
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JP4073890B2 |
A thin film circuit substrate is provided with a voice-output-section driving section, formed of a thin film layer on an insulative substrate, for driving a voice output section. An antisurge section, provided on a wiring between the voi...
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JP4061026B2 |
A tag card structure allows electrodes in a dispersive transducer (9) with a positive electrode aerial part (31) and a negative electrode aerial part (32) to connect to common bus wires in non-dispersive transducers (16). A transducer de...
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JP4059622B2 |
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JPWO2005096664A1 |
Even when the bone conduction speaker and the air conduction speaker are compactly combined and the installation space is limited like a mobile phone, it is possible to use both speakers together to functionally use the output properly. ...
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JP4047805B2 |
An acoustic system has an acoustic sensor and a processing circuit. The acoustic sensor includes a base, a microphone having a microphone diaphragm supported by the base, and a hot-wire anemometer having a set of hot-wire extending membe...
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JP2008502219A |
An acoustic transducer comprises one or more electromagnetic motors that drive one or more sets of multiple diaphragms to provide acoustically efficient loudspeaker systems having dimensions that allow use in applications that would be d...
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JP2007336201A |
To provide a speaker device which is capable of avoiding the generation of a back electromotive force, a resonance phenomenon, and a group delay phenomenon and is capable of faithfully reproducing original sounds by driving a diaphragm i...
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JP4004400B2 |
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JP3997280B2 |
A diaphragm of an optical-acoustic transducer, which improves placement and a shape of a suspension in a cantilever form, and is compact with high performance and suitable for mass production, is provided. In the optical-acoustic transdu...
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JP2007528498A |
The present invention discloses an apparatus for detecting a buried object using solitary waves comprising: an acoustic source for emitting a solitary wave; at least one first acoustic sensor for generating a first reflected wave signal ...
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JP3982621B2 |
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JP3982616B2 |
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JP2007243999A |
To provide an electroacoustic capsule or electroacoustic transducer which can change the electroacoustic characteristics of the capsule or transducer, after its manufacture, in a directed and simple way, preferably when mounting the caps...
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JP3974114B2 |
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JP2007228299A |
To raise the transmission speed compared with that using a piezoelectric element for generating compressional waves, and to improve the quality of the data transmission. A data processor circuit 10 generates transmission data and reads t...
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JP3965432B2 |
To provide a single sound source making means for preventing the occurrence or discharge of an antiphase wave in a direct modulation airflow speaker for performing direction modulation when airflow is generated. This direct modulation ai...
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JP3961692B2 |
To provide a microphone which requires no A/D converter. This microphone provides an output of a direct 1-bit digital audio signal. The microphone is provided with position sensors 110-130 that output a signal which denotes the position ...
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JP3957276B2 |
To provide an ultrasonic receiving apparatus equipped with a condition capable of obtaining superior sensitivity in the ultrasonic receiving apparatus of an optical detection system. The ultrasonic receiving apparatus is provided with an...
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JP3959020B2 |
To solve a problem that a practical application has been difficult since it is affected by a noise from the periphery in an electrostatic type or an electromagnetic type, while the electrostatic type or an electromagnetic type other than...
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JP3953752B2 |
To provide a diaphragm for a optoacoustic transducer with high performance suitable for mass-productivity. A slit 1s is made on the diaphragm 1 for the optoacoustic transducer where a light emitting element and a light receiving element ...
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JP3954569B2 |
An electropneumatic acoustic horn is disclosed, comprising an electric compressor unit for generating compressed air and a sound wave generator comprising at least an acoustic chamber associated to at least a volute wound acoustic duct a...
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JP3951613B2 |
To provide a photodetection type microphone 10 excellent in miniaturization and directivity, and not requiring a mirror finished surface. A diaphragm 27 vibrates by receiving a sound pressure. An optical waveguide 28 is formed along the ...
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JP3947649B2 |
To provide a method and apparatus for generating an audible range sound wave capable of generating the sound wave with ultrasonic synthesis in an open space. A triangle signal, which is voice-inputted from a microphone 3, is amplified at...
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JP3948700B2 |
To provide an acoustoelectric transducer which is hardly affected by the aging of a diaphragm and in which an optical system portion has a simple configuration. The acoustoelectric transducer is provided with a clock oscillating circuit ...
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JP2007180798A |
To provide new constitution of a hybrid speaker combining a conductive speaker unit and a piezoelectric speaker unit.In an acoustic interference room 18 to be a substantial closed space constituting a first acoustic means, a compressiona...
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JP2007180707A |
To provide a vibration detecting device that accurately detects vibrations without generating an error in a detection result even when a transmission distance becomes long.A first optical signal is transmitted from a main body section 1 ...
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JP3911433B2 |
To provide an optical acoustic-electric signal converter capable of miniaturizing an apparatus, simplifying a manufacturing process, and obtaining stable characteristics. In the optical acoustic-electric signal converter, a light emitted...
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JP3908751B2 |
To provide an electroacoustic transducer which is small in size and can be optically aligned at a design level of a semiconductor device. In the electroacoustic transducer, an optical wave from a light source 14 is introduced to a first ...
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JP2007104003A |
To provide an acoustoelectric conversion system capable of recognizing speech by simple processing.The acoustoelectric conversion system 100 comprises a diffraction grating 7; a diaphragm 2 vibrated by sound pressure; a light source 1 fo...
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JP3907405B2 |
To provide a sound detector that avoids deterioration in the S/N due to the effect of atmospheric disturbance. The sound detector is provided with a diaphragm 1 that is vibrated by sound, a light emitting and light receiving element boar...
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JP3907413B2 |
To provide a sound detector that has a stable and inexpensive circuit by reducing the number of components of a control circuit for a light emitting element. The sound detector is provided with a diaphragm that is vibrated by sound, a li...
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JP2007096439A |
To vibrate an acoustic diaphragm appropriately.An acoustic diaphragm 21 is vibrated by a diaphragm driver 17 comprising both inductive oscillation elements 17a, 17b and capacitive oscillation elements 17c-17f. The inductive oscillation e...
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JP2005513942T5 |
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JP3898716B2 |
To prevent low-range sound from being attenuated even if a capacitor type or polymeric piezoelectric speaker system is installed close to the wall, and to improve sound quality of low-range sound of a dynamic or ceramic piezoelectric spe...
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JP2007069325A |
To provide a minute electromagnetic device manufacturing method for manufacturing a small minute-electromagnetic device at an arbitrary place and into an arbitrary shape by using FIB-CVD, and a minute electromagnetic device manufactured ...
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JP2007067999A |
To provide a compact and long-life vibration sound generator for a low frequency area by which faithful reproduction in a low frequency area which is difficult in principals by a conventional reproduction apparatus.In a device which is d...
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JP2007054831A |
To provide a novel ultrasonic sound source, which is useful as an ultrasonic sound source, a speaker sound source, an actuator, or the like and particularly useful as an ultrasonic sensor sound source, possesses high power-proof property...
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JP3887537B2 |
To provide an electroacoustic transducer provided with a high performance diaphragm, which is suitable for mass production, and with a light shading hosing structure. The center part of the diaphragm 103 and the upper face of the light s...
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JP3887535B2 |
To provide an electroacoustic transducer provided with a high performance diaphragm which is suitable for mass production, and with a light shading housing structure. The center part of the diaphragm 103 and the upper face of the light s...
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JP3883481B2 |
To achieve cost reduction while keeping real time properties at the time of reception of ultrasonic waves in an ultrasonic receiving device capable of reducing a change in the ultrasonic wave detection sensitivity due to a change in envi...
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JP3884444B2 |
To provide an acoustoelectric conversion element and an an acoustoelectric conversion system capable of realizing a filtering function and an amplification function for audio signals, by addition of a simple circuit. An acoustic sensing ...
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JP2007043291A |
To provide a microphone element having a simple structure and capable of reducing a manufacturing cost in a microphone utilizing an optical fiber sensor.A vibration sheet 13 for capturing the vibration of a medium is provided with optica...
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JP3880493B2 |
To solve a disadvantage in the principle of bass reproduction that a conventional technique has essentially by a new system that performs direct modulation in the generation of airflow, which is called as a direct modulation type airflow...
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JP2007037005A |
To provide an ultrasonic sensor the sensing sensitivity of which is much more enhanced than that of prior arts.The ultrasonic sensor includes: a diaphragm formed to be a membrane by processing a semiconductor substrate; a frame 2 compris...
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