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Matches 351 - 400 out of 1,389

Document Document Title
JP2013142594A
To provide an easy-to-use vibration sensor detecting an external vibration by utilizing an electret.A vibration sensor outputs a detection signal of an external vibration when a relative position between an electret group and an electrod...  
JP2013138292A
To provide an electro-acoustic transducer that can reduce vibration in a longitudinal direction while positioning a supporting point of the vibration generated at a center of an electro-mechanical transducer.An electro-mechanical transdu...  
JP2013524630A
A loud speaker contains a movable type magnetic motor. A movable type magnetic motor contains a lever arm which has combined an armature provided with a magnetic career, an armature, and a pivot. A lever arm has combined an armature and ...  
JP2013055527A
To strengthen a sound in a low frequency range emitted from a driver unit.An exemplary driver unit includes: an acoustic conversion unit; and a housing body in which the acoustic conversion unit is housed, and in which an opening is form...  
JP2013021666A
To provide a speaker in which a diaphragm can be arbitrarily changed by adjusting it to a user's taste.In the present invention, a conventional operation of a speaker is enabled without integrating a coil and the diaphragm by connecting ...  
JP5112159B2  
JP5006811B2  
JP5002033B2  
JP2012129838A
To provide an electroacoustic transducer capable of providing a reproduction sound of high sound quality with a wide reproduction frequency band.The electroacoustic transducer includes: a housing 1 having a sound emitting hole 12a for em...  
JP4944963B2  
JP4933597B2  
JP2012085019A
To materialize a structure for preventing the coming-off of a cord suitable for downsizing of a housing, in an acoustic device such as an earphone.An acoustic device comprises a cord made by coating a plurality of core wires forming a vo...  
JP2008252871A5  
JP4875733B2  
JP4876292B2  
JP2012501609A
An embodiment of a device is provided with the following. A drive coil in which voltage impression with a drive signal is possible, At least one permanent magnet, At least one magnetic return way element along which magnetic flux guided ...  
JP4856918B2  
JP2012004850A
To improve a workability in assembling a beam part of an acoustic transducer.An acoustic transducer is provided with a drive unit 2 including a pair of magnets 6,6, a york 5 having the pair of magnets attached therein, a coil 7 to which ...  
JP2012004851A
To improve workability in assembly operation of an acoustic transducer.An acoustic transducer includes a drive unit 2 having a pair of magnets 6, 6, a york 5, a coil 7, and an armature 9 to be fixed to the yoke and having a vibration par...  
JP2012004853A
To improve acoustic characteristics by suppressing a variance of the sound pressure in a frequency region considered as the sound output range, particularly in a high frequency band.The acoustic transducer is provided with a driving unit...  
JP2012004852A
To facilitate adjustment of a position of a vibration part with respect to a pair of magnets and a coil, and to enhance positional accuracy.An acoustic transducer comprises: a driving unit 2 which has the pair of magnets 6 and 6 arranged...  
JP2010505366A5  
JP4744685B2  
JP4713285B2
Electro-dynamic loudspeakers typically include a diaphragm having a conductor applied to one of its surfaces. The diaphragm is secured to a frame. The conductor is connected to a power supply for providing electrical current through line...  
JP4662522B2  
JP2011040933A
To provide an earphone with a good efficiency with sound waves being efficiently propagated by contriving to reduce an air resistance of a sound conductive tube extending from a housing.The earphone includes: a driver unit 2 for driving ...  
JP2011030013A
To provide a thin moving-magnet type speaker by providing a quantitative guideline about a weight of a magnetic circuit and by suppressing an increase in inductance while sustaining a magnetic flux density of a voice coil.The moving-magn...  
JP2010178376A
To provide a method of improving an electro-dynamic planar speaker and a method of manufacturing the electrio-dynamic planar speaker.The electro-dynamic speaker typically includes a diaphragm plate having a conductor stucked to one of su...  
JP4448992B2  
JP4447356B2  
JP4433969B2  
JP2010505366A
The present invention provides a method and a device for an audio tolan スデュ * sir. An audio tolan スデュ * sir is excited by driving a paddle of a diaphragm. A plurality of node fields of a paddle are determined for a higher mod...  
JP4412495B2  
JP2010028813A
To improve the utilization ratio of an earphone with respect to magnetic energy.An earphone comprises a casing, a magnetic field system and a vibration system disposed in the casing. The magnetic field system includes a magnet and a coil...  
JP2009267779A
To provide an electromagnetic electro-acoustic transducer which has a configuration different from that of an electro-acoustic conversion means of a conventional speaker and can make the outer shape of a speaker sufficiently slender.In t...  
JP4276315B2  
JP4260333B2  
JP4244759B2  
JP4210677B2  
JP2009010709A
To solve problems that a high current flows in a flexible and conductive thin wire used for a moving coil, and then the wire is disconnected or deformed caused by heat generation in a speaker.An electric acoustic converter, such as a spe...  
JP2008252872A
To reduce a parasitic magnetic path in a movable armature container which vibrates an armature with an electric signal supplied to a coil by setting the armature in a magnetic field of one or more coils.Disclosed is the movable armature ...  
JP2008252871A
To provide a movable armature container which vibrates an armature with an electric signal supplied to a coil by setting the armature in a magnetic field of one or more magnets.Disclosed is the compact movable armature container which ha...  
JP2008199336A
To provide a ribbon microphone unit that can be easily exchanged while surely maintaining electrical connection between the ribbon microphone unit and wiring with the primary side of a step-up transformer, and a ribbon microphone.The rib...  
JP2008167247A
To prevent disconnection of lead wire for supplying a signal to a coil, to reduce leak magnetic fluxes and to raise radiation nature.This voice coil motor M1 is a movable magnet type voice coil motor having a stator 21 and a moving membe...  
JP4118863B2  
JP2008125051A
To provide an acoustic transducer for improving a conventional balanced version pendulum type fault.The acoustic transducer includes, within a casing (300), a diaphragm (350) at least a portion of which is constituted of magnetically per...  
JP4091006B2  
JP4080870B2  
JP4073382B2  
JP4037409B2  

Matches 351 - 400 out of 1,389