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8135160 |
Speaker device and mobile phone
A speaker device includes: a magnetic circuit which includes two magnetic gaps; a diaphragm which is arranged at a position passing through at least the two magnetic gaps and includes a recessed...
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8098871 |
Dynamic microphone
Even in the case where the volume of a back air chamber is small, sounds with a low frequency (low range) can be captured by equivalently decreasing the acoustic impedance of the back air chamber....
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8045741 |
Boundary microphone
A boundary microphone, comprising: a base made of a metal; a cover made of a metal having a plurality of holes for introducing sound waves; and internal components including a microphone unit that...
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8031898 |
Dynamic microphone
There is provided a dynamic microphone in which the output impedance does not increase and also the failure rate does not increase though using a microphone unit and a vibration detecting unit to...
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8027492 |
Armature for a receiver
An armature for a receiver comprising a first and a second leg portion each having a thickness and a width and connected to each other, and a connection portion in communication with the first and...
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7869610 |
Balanced armature bone conduction shaker
A bone conduction transducer suitable for use in a listening device, such as hearing aids, in-ear monitors, headphones, electronic hearing protection devices, and very small scale acoustic...
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7561705 |
Reduction of flux leakage in a dynamic microphone
Leakage flux is reduced particularly in a magnetic gap of a magnetic circuit to improve the sensitivity of a dynamic microphone. A dynamic microphone including a magnetic circuit unit 20 including...
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7433478 |
Microphone pick-up device
A microphone pick-up device includes an air chamber unit disposed posteriorly of an annular cap body. A pick-up unit generates an acoustic signal in response to detected sound, and includes a yoke...
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7412066 |
Microphone
A sound recording and/or sound reproducing part loosely anchored/connected to a second part wherein the sound recording and/or sound reproducing part is levitated on a magnetic field. The sound...
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7239712 |
Inductor-based MEMS microphone
An inductor-based integrated MEMS microphone and a method of making the microphone is provided. The microphone structure includes a vibrating inductor that is suspended over another stationary...
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6832518 |
Pressure wave sensor using levitated mass
A mass is levitated with respect to a base, at least one of which is comprised of a diamagnetic material, with the levitated mass also having a permanent magnetic property. A second permanent...
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6091828 |
Dynamic microphone
A vibration detecting unit is arranged in an air chamber in communication with a microphone unit and changes in pressure in the air chamber caused by the vibrations of a diaphragm of the vibration...
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6075866 |
Electroacoustic transducer having axially extending corrugated supporting means for the diaphragm
In an electroacoustic transducer (1) having a diaphragm (19) and having a supporting means (25) for the diaphragm (19) the diaphragm (19) and the supporting structure (25) form a single part, and...
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5995637 |
Assembly housing for electroacoustical transducer
An assembly housing for accepting an electroacoustical transducer having a rear face with terminal pins proceeding therefrom, contact surfaces thereon, and at least one sound admission opening, is...
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5673330 |
Microphone transducer with noise reducing member
A microphone transducer includes a magnet, a yoke disposed around the magnet, an inner insulator provided between the magnet and the yoke, an outer insulator provided around the yoke, a voice coil...
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5263093 |
Microphone device in use in for communication apparatus for motorcycle
In a close talking microphone device in use for a communication apparatus for a motorcycle, a front casing 2 and a back casing 3 are provided with a front opening 7 and a back opening respectively....
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5255328 |
Dynamic microphone
The invention relates to a supporting structure of a diaphragm of a dynamic microphone. A viscous liquid is filled in the inside of the peripheral edge portion of the edge portion of the diaphragm,...
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5148492 |
Diaphragm of dynamic microphone
There is a dynamic microphone comprising: a diaphragm which can vibrate by an acoustic wave and a voice coil which is joined to the diaphragm so as to transverse a magnetic field formed by the...
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5033093 |
Compact microphone and method of manufacture
A microphone has a diaphragm having a dome central portion being formed of laminate of a thin layer of synthetic resinous material and a thin wire mesh contacting the central portion. As...
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4858719 |
Pressure gradient pickup
A pressure gradient pickup, particularly a capacitor microphone or a dynamic microphone, has a diaphragm arranged in a housing and at least one sound entry opening which conducts the sound to the...
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4840183 |
Electrocardiograph
A displacement sensor for an electrocardiograph attaches a permanent magnet chip directly on a living body, and movement or vibration of the living body is sensed by measuring flux by said magnet....
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4817165 |
Acoustic speaker device with a diaphragm having a spider web type core
A dome-shaped acoustic motor diaphragm having a core of aluminum foil in the form of a spider web configuration resulting in the dome shape, the diaphragm being in the form of an annular semi-dome...
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4765321 |
Displacement sensor for a living body
A displacement sensor for a living body provides an improved stethoscope and/or cardiogram. The apparatus has a diaphragm which is placed on the surface of a living body, a permanent magnet located...
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4410770 |
Directional microphone
A unidirectional dynamic microphone provided with a first sound path to the forward side of the diaphragm and a second sound path to the rear side of the diaphragm in which the second sound path...
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4340787 |
Electroacoustic transducer
An electroacoustic transducer of the electrodynamic type comprises a flat magnetic system permeable to sound including a diaphragm with conducting tracks which are disposed within the system which...
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3989905 |
Microphone
The disclosure describes improved apparatus for adjusting a unidirectional microphone in order to reduce the electrical output due to mechanical shocks applied to the microphone casing. The...
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3940575 |
Directional microphone
A pressure gradient directional microphone of the moving coil type in which the acousto-mechanical function of the transducer is achieved by a vibratile diaphragm the major area of which is of...
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3891809 |
Magnet system for an acoustic transducer
Magnet system for an acoustic transducer, in particular an electrodynamic microphone, which system comprises a main magnet and a ferromagnetic circuit the upper plate of which together with a...
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3858305 |
METHOD OF MANUFACTURING A DEVICE FOR CONVERTING ELECTRIC OSCILLATIONS INTO ACOUSTIC VIBRATIONS AND VICE VERSA
A method of manufacturing a device for converting electric oscillations into acoustic vibrations and vice versa, preferably a microphone, in which method first the drive system is rigidly secured...
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3790724 |
ELECTROMAGNETIC MICROPHONE INCLUDING AT LEAST ONE ACOUSTIC RESISTANCE
Electrodynamic microphone provided with a diaphragm having a moving coil which is disposed in the active air-gap of a magnet system. The air volume behind the diaphragm is connected to acoustic...
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3766333 |
SHOCK INSENSITIVE TRANSDUCER
A microphone with a transducer having a vibratal diaphragm at one end defining one of the walls of a diaphragm chamber and a shock mount diaphragm at the other end defining one of the walls of a...
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3652810 |
MICROPHONE HAVING A PROTECTIVE CAP
A microphone includes a microphone housing having a sound transducer therein. A cover of substantially cup-shaped configuration fits over one end of the housing above the transducer and it is made...
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3581015 |
DYNAMIC MICROPHONE
This specification discloses a novel dynamic microphone using a flat annular magnet formed of an anisotropic barium ferrite as a permanent magnet to establish a magnetic circuit. The present...
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3555206 |
MICROPHONE DIAPHRAGM ASSEMBLY
A composite diaphragm structure combining a deeply drawn main diaphragm, an inturned compliance ring under the main diaphragm and an elastomer stiffener and damper applied to the front face of the...
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3536863 |
ELECTRODYNAMIC MICROPHONE HAVING A CARDIOIDAL DIRECTIONAL CHARACTERISTIC
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3495209 |
UNDERWATER COMMUNICATIONS SYSTEM
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3418437 |
Electro-acoustic transducer having a resonator cavity damped
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3288942 |
Transducer device
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3258543 |
Dynamic microphone
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3255317 |
Stereo microphone
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3141070 |
Electrodynamic microphone
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3115207 |
Unidirectional microphone
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3113186 |
Telephone device
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3061690 |
Acoustically compensated microphone with adjustable acoustic resistance
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3014099 |
Electroacoustic transducer
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3013127 |
Sound-transducing apparatus
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2966558 |
Transducer and vibratory diaphragm
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2958739 |
Electroacoustic transducer
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2950358 |
Electromechanical transducer
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2947823 |
Electromechanical transducer
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