WO2009141912A1 - Appareil écouteur - Google Patents

Appareil écouteur Download PDF

Info

Publication number
WO2009141912A1
WO2009141912A1 PCT/JP2008/059530 JP2008059530W WO2009141912A1 WO 2009141912 A1 WO2009141912 A1 WO 2009141912A1 JP 2008059530 W JP2008059530 W JP 2008059530W WO 2009141912 A1 WO2009141912 A1 WO 2009141912A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezoelectric diaphragm
piezoelectric
weight
housing
vibration
Prior art date
Application number
PCT/JP2008/059530
Other languages
English (en)
Japanese (ja)
Inventor
泰彦 野村
Original Assignee
日本エムエムアイテクノロジー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本エムエムアイテクノロジー株式会社 filed Critical 日本エムエムアイテクノロジー株式会社
Priority to PCT/JP2008/059530 priority Critical patent/WO2009141912A1/fr
Priority to JP2010512894A priority patent/JPWO2009141912A1/ja
Publication of WO2009141912A1 publication Critical patent/WO2009141912A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/13—Hearing devices using bone conduction transducers

Definitions

  • the present invention relates to an earphone device that transmits vibration due to a piezoelectric body to a cochlear organ, for example, via an outer ear.
  • An electromagnetic speaker of this type includes a coil that generates a magnetic field, and a diaphragm on which a permanent magnet is attached.
  • the diaphragm vibrates due to the action of the magnetic field of the coil generated by the audio signal supplied from the outside, the fixed magnet and the magnetic field, and this vibration is transmitted as air vibration to the human eardrum.
  • the bone conduction type speaker vibrates the vibration unit by an audio signal supplied from the outside, and directly transmits the vibration of the vibration unit to a hard part such as a skeleton of the head.
  • the transmitted vibration is transmitted to the tympanic membrane through the skeleton.
  • Patent Documents 1 and 2 and the like There is a bone conduction type speaker having a structure in which a plate-shaped vibrating portion is supported in a cantilever manner.
  • Patent Document 1 a silicon substrate is subjected to etching processing to form a plate-like vibrating portion to be a cantilever structure, and a piezoelectric layer and a pair of conductive layers sandwiching the piezoelectric layer are formed in this vibrating portion.
  • An actuator having a stacked structure is disclosed.
  • Patent Document 2 discloses a piezoelectric speaker in which a piezoelectric vibrator supported in a cantilevered manner in a housing and an elastic body having different hardness are disposed between the piezoelectric vibrator and the housing.
  • an earphone using a bone conduction type speaker is suitable for listening to a conversation or the like, it is a fact that it is not suitable for listening to music or the like.
  • the present invention has been made in view of the above-mentioned problems, and its object is to provide an earphone device capable of generating sound of the same size as other frequency bands even in the low frequency band at audio frequencies. It is to provide.
  • the configuration of the earphone device adopted by the present invention is a piezoelectric diaphragm for converting an electric signal into mechanical vibration, a part of the piezoelectric diaphragm, a fixed end, and another part is a free end. And a sound conduit communicating with the inner space of the housing and guiding the air vibration emitted by the piezoelectric diaphragm to the outside, and provided at the free end of the piezoelectric diaphragm.
  • the piezoelectric diaphragm is formed as a plate having a rectangular flat surface, and the internal space of the housing is elongated along the longitudinal direction of the piezoelectric diaphragm.
  • the free end of the piezoelectric diaphragm is formed near a junction of the housing and the sound conduit.
  • the weight is disposed in an internal space in the vicinity of the junction of the sound conduit so as to be able to vibrate.
  • the natural frequency f of the piezoelectric diaphragm is preferably set by the following equation.
  • the impedance in the low frequency band of the piezoelectric diaphragm is artificially lowered by facilitating vibration even in the low frequency band.
  • the impedance in the low frequency band of the piezoelectric diaphragm is artificially lowered by facilitating vibration even in the low frequency band.
  • FIG. 1 It is a sectional view showing an earphone device concerning an embodiment of the present invention. It is a disassembled perspective view which shows the vibration source which concerns on the embodiment. It is an explanatory view showing operation of a piezoelectric diaphragm concerning the embodiment. It is a figure which shows the frequency characteristic of an earphone apparatus. It is a figure which shows the attachment structure of the weight with respect to the piezoelectric diaphragm by a modification.
  • FIG 1 and 2 are views showing the appearance of a canal type earphone device according to the present embodiment.
  • the earphone device 10 is detachably attached to a housing 11 formed in a hollow oval shape in cross section by a resin material (for example, a synthetic resin such as ABS, PE, PP, PVC, etc.) and the ear insertion portion 16 of the housing 11 And an ear pad 29 made of a rubber cylindrical body, and a vibration source 31 housed in the internal space 14 of the housing 11.
  • a resin material for example, a synthetic resin such as ABS, PE, PP, PVC, etc.
  • the housing 11 includes a bottom housing 12, a lid housing 13 fixed to the bottom housing 12 via a fitting mechanism (not shown), and a combination of the lid housing 13 with the bottom housing 12. And an interior space 14 defined therebetween.
  • a code cover 15 for extending the lead wire 39 to the outside is provided, and at one end of the lead wire 39, the pattern terminal 35 of the substrate 32 is connected as shown in FIG.
  • a connector (not shown) connected to an external device is connected.
  • a stepped cylindrical ear insertion portion 16 is formed to protrude.
  • An annular step portion is formed on the outer peripheral surface of the ear insertion portion 16 to prevent the ear pad 29 from coming off.
  • the inner periphery of the ear insertion portion 16 serves as a sound conduit 17 for connecting the internal space 14 to the outside, and the sound conduit 17 emits the sound emitted by the piezoelectric diaphragm to the outside.
  • the portion where the ear insertion portion 16 and the lid-side housing 13 are joined becomes a large diameter starting portion 16A, and the narrowing portion where the outside of the starting portion 16A becomes the smallest diameter in the sound conduit 17 16B, and the outside of the throttling portion 16B is a tip portion 16C that opens to the outside.
  • the sound conduit 17 has a shape whose hole diameter is different.
  • the sound conduit 17 transmits the air vibration generated in the internal space 14 by the vibration of the piezoelectric diaphragm 41 to the outside.
  • the vibration source 31 is disposed in the internal space 14 so that the weight 45 is partially contained in the sound conduit 17.
  • the tip end of the weight 45 is embedded in a space between the raised end 16A of the ear insertion portion 16, the movement distance of the weight 45 when the piezoelectric diaphragm 41 vibrates is secured.
  • ⁇ Configuration of vibration source> As shown in FIG. 2, a part of the vibration source 31 housed in the internal space 14 of the housing 11 is separated from the spacer 36 in a state of being separated substantially parallel to the rectangular substrate 32 and the substrate 32.
  • the piezoelectric diaphragm 41 supported by the substrate 32 via the interposition, and a weight 45 provided at the free end of the piezoelectric diaphragm 41.
  • an electronic element 33 constituting an amplifier circuit or the like for generating a drive signal is mounted.
  • pattern terminals 35, 35,... Drawn from the wiring pattern 34 are formed.
  • the back surface of the substrate 32 is fixed to the wall surface on the bottom side housing 12 side via the fixing portions 37, 37.
  • the piezoelectric vibration plate 41 has a laminated structure (for example, 30 mm ⁇ 5 mm ⁇ 0.4 mm) in which a rectangular piezoelectric material and a metal plate are alternately laminated.
  • the piezoelectric vibration plate 41 is alternately laminated with a plate-like piezoelectric material such as PZT (lead zirconate titanate) and a metal plate to form a nine-layer structure, and constitutes a plurality of bimorph structures.
  • a total of four substantially U-shaped electrodes 42 are provided at the left and right positions in the longitudinal direction of the piezoelectric diaphragm 41. Since these electrodes 42 are also in electrical contact with the plate-like piezoelectric members positioned between the piezoelectric diaphragms 41, by supplying drive signals to the respective electrodes 42, vibrations are applied to the respective piezoelectric members. generate.
  • FIG. 3 shows a single plate-like piezoelectric member constituting the piezoelectric vibration plate 41.
  • a strong magnetic field is applied to each electrode 42 to perform polarization processing.
  • a piezoelectric body having a piezoelectric constant d 31 in which the polarization direction and the electric field direction are aligned in the longitudinal direction of the piezoelectric body and the distortion direction is orthogonal to this is formed.
  • An audio signal supplied from the outside is transmitted to the substrate 32 through the lead wire 39, generates a drive signal amplified by the electronic device 33 mounted on the substrate 32, and is supplied to each electrode 42 of the piezoelectric diaphragm 41. Be done.
  • the piezoelectric diaphragm 41 receiving the supplied drive signal starts lateral vibration.
  • the vibration of the piezoelectric diaphragm 41 is also transmitted to the substrate 32 through the spacer 36 to vibrate the entire vibration generating source 31 and cause the housing 11 to generate mechanical vibration.
  • the vibration of the housing 11 is transmitted to the outer ear of the user, converted into an audio signal through the cochlear organ and the auditory nerve through the outer ear, and transmitted to the brain.
  • the vibration of the piezoelectric diaphragm 41 vibrates the air in the internal space 14 and reaches the tympanic membrane as an air conduction sound through the sound conduit 17 and is transmitted to the brain through the cochlear organ and the auditory nerve.
  • the above is the basic operation of the earphone device.
  • a characteristic line A indicated by a solid line indicates frequency characteristics of the piezoelectric body (size: 30 mm ⁇ 5 mm ⁇ 0.4 mm, Young's modulus: 6.67 ⁇ 10 10 , as indicated by the characteristic line A, piezoelectric
  • a weight 45 ( ⁇ 5 ⁇ 5 mm: 0.8 g) is provided at the free end of the piezoelectric diaphragm 41 (a position at a distance of 27 mm from the spacer 36).
  • a mechanical resonance point occurs in the vicinity of 100 Hz in the piezoelectric diaphragm 41 by the weight 45. That is, the weight 45 makes the piezoelectric vibrating plate 41 easily vibrated in the low frequency range (around 100 Hz).
  • the piezoelectric diaphragm 4 can be vibrated to a large extent, and the generated sound can be increased.
  • ⁇ Effect of earphone device> In the earphone device 10 according to the present embodiment, by providing the weight 45 at the free end of the piezoelectric diaphragm 41, the resonance point of the piezoelectric diaphragm 41 is made to be in the low frequency band. Thus, the piezoelectric diaphragm 41 can generate vibration even in a low frequency band, and can generate a large amount of low frequency sound as compared with the piezoelectric diaphragm without the weight 45. Become.
  • the earphone device 10 further includes an ear insertion portion 16 having a sound conduit 17.
  • the sound in the audible frequency band vibrates the air in the internal space 14 by the vibration of the piezoelectric diaphragm 41, and the air vibration is transmitted to the ear canal of the user through the sound conduit 17.
  • the vibration of the piezoelectric vibrator 41 is transmitted to the housing 11, and this mechanical vibration is transmitted through the outer ear via the ear insertion portion 16 and the ear pad 29.
  • the earphone device 10 can secure a wide range of the generated frequency, and the clarity of the sound is significantly improved.
  • the vibration can be increased in the low frequency band and the sound in the low frequency band can be generated more than in the piezoelectric vibration plate without the weight.
  • the vibration generating source 31 is disposed so as to overlap the piezoelectric vibrating plate 41 on the substrate 32 in a separated state, the area occupied by the substrate and the piezoelectric vibrating plate is larger than that of Patent Document 1 in which Can be narrowed, and the earphone device 10 can be miniaturized.
  • the vibration generating source 31 has a structure in which the piezoelectric vibration plate 41 is supported in a cantilever manner with respect to the substrate 32, the vibration of the piezoelectric vibration plate 41 receiving the supply of the drive signal can be efficiently generated. it can.
  • the weight m of the weight is about 0.05 to about the size of the piezoelectric vibration plate 41 when the Young's modulus is 6.67 ⁇ 10 10 N / m 2. It has been verified that the natural frequency f can be set to 80 to 400 Hz by setting it to 1.00 g, and a remarkable effect can be obtained.
  • the natural frequency f of the piezoelectric diaphragm 41 can be obtained by varying the mass m of the weight based on Equation 3.
  • FIG. 5 shows an example of the attachment structure of the weight to the piezoelectric diaphragm.
  • FIG. 5A shows a state in which a cylindrical weight 45 is attached to the back surface of the piezoelectric diaphragm 41 (the opposite side as viewed from the sound conduit 17).
  • FIG. 5B shows a state in which cylindrical weights 45 a and 45 b are attached to the front and back surfaces of the piezoelectric diaphragm 41.
  • FIG. 5C shows a state in which small-diameter cylindrical weights 45 c and 45 d are attached to the surface of the piezoelectric diaphragm 41.
  • FIG. 5D shows a state in which a plate-like weight 45 e is attached to the surface of the piezoelectric vibration plate 41.
  • FIG. 5E shows a state in which plate-like weights 45f and 45g are attached to the front and back surfaces of the piezoelectric diaphragm 41.
  • the structure is not limited to the above mounting structure, and any structure may be used as long as a weight is provided on the free end side of the piezoelectric diaphragm 41.
  • the vibration state of the air generated in the internal space 14 differs depending on the shape of the weight provided at the free end of the piezoelectric diaphragm 41, so the sound emitted from the sound conduit 17 changes. Therefore, by appropriately selecting the shape and the mounting position of the weight, the earphone device 10 can be provided according to the needs of the user.
  • the piezoelectric diaphragm 41 is supported in a cantilever manner by the spacer 36.
  • the present invention is not limited thereto. Both ends of the piezoelectric diaphragm 41 are supported by the spacer and the intermediate portion is used as a free end. It may be a structure to vibrate. At this time, a weight may be attached to the middle portion.
  • the piezoelectric diaphragm 41 is formed by laminating the piezoelectric body in nine layers, and four substantially U-shaped electrodes 42 are provided at the left and right positions of the long side.
  • the number of laminated piezoelectric vibrators 41 and the material thereof are not limited to this, and may be piezoelectric bodies having other piezoelectric constants as long as the piezoelectric vibrator 41 vibrates in the thickness direction by the supplied drive signal. It is also good.
  • the ear insertion portion 16 of the earphone device 10 is inserted at the position of the boundary between the pinna of the user and the ear canal, but the tip end side of the ear insertion portion 16 is tapered. It may be configured to be positively inserted into the ear canal of the user.
  • the housing 11 from 2 members of the bottom side housing 12 and the lid side housing 13 with the resin material was mentioned as the example, what was integrally formed may be used.
  • the vibration source of the earphone device 10 according to the above embodiment does not have an electromagnetic generation source that generates sound by a magnetic field, so that it can be used at a place where a strong magnetic field such as MRI is generated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Headphones And Earphones (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

L'invention porte sur un appareil écouteur (10) qui comprend un poids (45) à l'extrémité libre d'une membrane piézoélectrique (41) pour amener le point de résonance de la membrane piézoélectrique (41) dans une bande de fréquences basses. Cela permet à la membrane piézoélectrique (41) de générer des vibrations même dans la bande de fréquences basses. Ainsi, la membrane piézoélectrique (41) peut générer un son plus intense dans la bande de fréquences basses que celui généré par une membrane piézoélectrique n'ayant pas de poids (45).
PCT/JP2008/059530 2008-05-23 2008-05-23 Appareil écouteur WO2009141912A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2008/059530 WO2009141912A1 (fr) 2008-05-23 2008-05-23 Appareil écouteur
JP2010512894A JPWO2009141912A1 (ja) 2008-05-23 2008-05-23 イヤホン装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/059530 WO2009141912A1 (fr) 2008-05-23 2008-05-23 Appareil écouteur

Publications (1)

Publication Number Publication Date
WO2009141912A1 true WO2009141912A1 (fr) 2009-11-26

Family

ID=41339861

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/059530 WO2009141912A1 (fr) 2008-05-23 2008-05-23 Appareil écouteur

Country Status (2)

Country Link
JP (1) JPWO2009141912A1 (fr)
WO (1) WO2009141912A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012144040A1 (fr) * 2011-04-20 2012-10-26 パイオニア株式会社 Écouteurs
JP2015053640A (ja) * 2013-09-09 2015-03-19 株式会社ファインウェル ステレオイヤホン
US9705548B2 (en) 2013-10-24 2017-07-11 Rohm Co., Ltd. Wristband-type handset and wristband-type alerting device
US9716782B2 (en) 2010-12-27 2017-07-25 Rohm Co., Ltd. Mobile telephone
US9729971B2 (en) 2012-06-29 2017-08-08 Rohm Co., Ltd. Stereo earphone
US9742887B2 (en) 2013-08-23 2017-08-22 Rohm Co., Ltd. Mobile telephone
WO2017145521A1 (fr) * 2016-02-23 2017-08-31 ソニー株式会社 Dispositif vestimentaire
US9894430B2 (en) 2010-12-27 2018-02-13 Rohm Co., Ltd. Incoming/outgoing-talk unit and incoming-talk unit
US9980024B2 (en) 2011-02-25 2018-05-22 Rohm Co., Ltd. Hearing system and finger ring for the hearing system
US10013862B2 (en) 2014-08-20 2018-07-03 Rohm Co., Ltd. Watching system, watching detection device, and watching notification device
US10079925B2 (en) 2012-01-20 2018-09-18 Rohm Co., Ltd. Mobile telephone
US10356231B2 (en) 2014-12-18 2019-07-16 Finewell Co., Ltd. Cartilage conduction hearing device using an electromagnetic vibration unit, and electromagnetic vibration unit
US10778824B2 (en) 2016-01-19 2020-09-15 Finewell Co., Ltd. Pen-type handset
US10795321B2 (en) 2015-09-16 2020-10-06 Finewell Co., Ltd. Wrist watch with hearing function
US10967521B2 (en) 2015-07-15 2021-04-06 Finewell Co., Ltd. Robot and robot system
US11526033B2 (en) 2018-09-28 2022-12-13 Finewell Co., Ltd. Hearing device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5942699U (ja) * 1982-09-10 1984-03-19 澤藤　正 圧電型イヤホン
JPS63110900A (ja) * 1986-10-28 1988-05-16 Murata Mfg Co Ltd 振動アラ−ム装置
JPH0926353A (ja) * 1995-07-12 1997-01-28 Mitsubishi Heavy Ind Ltd 多機能地震計
JPH09252496A (ja) * 1996-03-18 1997-09-22 Nec Corp 圧電式イヤホン
JP2006157226A (ja) * 2004-11-26 2006-06-15 Hosiden Corp フラットパネルスピーカ
JP2006237792A (ja) * 2005-02-23 2006-09-07 Matsushita Electric Ind Co Ltd 圧電型音響変換装置
JP2007228508A (ja) * 2006-02-27 2007-09-06 Nec Tokin Corp 受話装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5942699U (ja) * 1982-09-10 1984-03-19 澤藤　正 圧電型イヤホン
JPS63110900A (ja) * 1986-10-28 1988-05-16 Murata Mfg Co Ltd 振動アラ−ム装置
JPH0926353A (ja) * 1995-07-12 1997-01-28 Mitsubishi Heavy Ind Ltd 多機能地震計
JPH09252496A (ja) * 1996-03-18 1997-09-22 Nec Corp 圧電式イヤホン
JP2006157226A (ja) * 2004-11-26 2006-06-15 Hosiden Corp フラットパネルスピーカ
JP2006237792A (ja) * 2005-02-23 2006-09-07 Matsushita Electric Ind Co Ltd 圧電型音響変換装置
JP2007228508A (ja) * 2006-02-27 2007-09-06 Nec Tokin Corp 受話装置

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10779075B2 (en) 2010-12-27 2020-09-15 Finewell Co., Ltd. Incoming/outgoing-talk unit and incoming-talk unit
US9716782B2 (en) 2010-12-27 2017-07-25 Rohm Co., Ltd. Mobile telephone
US9894430B2 (en) 2010-12-27 2018-02-13 Rohm Co., Ltd. Incoming/outgoing-talk unit and incoming-talk unit
US9980024B2 (en) 2011-02-25 2018-05-22 Rohm Co., Ltd. Hearing system and finger ring for the hearing system
WO2012144040A1 (fr) * 2011-04-20 2012-10-26 パイオニア株式会社 Écouteurs
JPWO2012144040A1 (ja) * 2011-04-20 2014-07-28 パイオニア株式会社 イヤホン
US10158947B2 (en) 2012-01-20 2018-12-18 Rohm Co., Ltd. Mobile telephone utilizing cartilage conduction
US10778823B2 (en) 2012-01-20 2020-09-15 Finewell Co., Ltd. Mobile telephone and cartilage-conduction vibration source device
US10079925B2 (en) 2012-01-20 2018-09-18 Rohm Co., Ltd. Mobile telephone
US10506343B2 (en) 2012-06-29 2019-12-10 Finewell Co., Ltd. Earphone having vibration conductor which conducts vibration, and stereo earphone including the same
US10834506B2 (en) 2012-06-29 2020-11-10 Finewell Co., Ltd. Stereo earphone
US9729971B2 (en) 2012-06-29 2017-08-08 Rohm Co., Ltd. Stereo earphone
US10075574B2 (en) 2013-08-23 2018-09-11 Rohm Co., Ltd. Mobile telephone
US10237382B2 (en) 2013-08-23 2019-03-19 Finewell Co., Ltd. Mobile telephone
US9742887B2 (en) 2013-08-23 2017-08-22 Rohm Co., Ltd. Mobile telephone
JP2015053640A (ja) * 2013-09-09 2015-03-19 株式会社ファインウェル ステレオイヤホン
US10103766B2 (en) 2013-10-24 2018-10-16 Rohm Co., Ltd. Wristband-type handset and wristband-type alerting device
US9705548B2 (en) 2013-10-24 2017-07-11 Rohm Co., Ltd. Wristband-type handset and wristband-type alerting device
US10380864B2 (en) 2014-08-20 2019-08-13 Finewell Co., Ltd. Watching system, watching detection device, and watching notification device
US10013862B2 (en) 2014-08-20 2018-07-03 Rohm Co., Ltd. Watching system, watching detection device, and watching notification device
US10848607B2 (en) 2014-12-18 2020-11-24 Finewell Co., Ltd. Cycling hearing device and bicycle system
US10356231B2 (en) 2014-12-18 2019-07-16 Finewell Co., Ltd. Cartilage conduction hearing device using an electromagnetic vibration unit, and electromagnetic vibration unit
US11601538B2 (en) 2014-12-18 2023-03-07 Finewell Co., Ltd. Headset having right- and left-ear sound output units with through-holes formed therein
US10967521B2 (en) 2015-07-15 2021-04-06 Finewell Co., Ltd. Robot and robot system
US10795321B2 (en) 2015-09-16 2020-10-06 Finewell Co., Ltd. Wrist watch with hearing function
US10778824B2 (en) 2016-01-19 2020-09-15 Finewell Co., Ltd. Pen-type handset
US10735844B2 (en) 2016-02-23 2020-08-04 Sony Corporation Wearable device
US20200068284A1 (en) * 2016-02-23 2020-02-27 Sony Corporation Wearable device
US10524036B2 (en) 2016-02-23 2019-12-31 Sony Corporation Wearable device
WO2017145521A1 (fr) * 2016-02-23 2017-08-31 ソニー株式会社 Dispositif vestimentaire
JPWO2017145521A1 (ja) * 2016-02-23 2018-12-13 ソニー株式会社 ウェアラブル装置
JP7020398B2 (ja) 2016-02-23 2022-02-16 ソニーグループ株式会社 ウェアラブル装置
US20190052949A1 (en) * 2016-02-23 2019-02-14 Sony Corporation Wearable device
US11526033B2 (en) 2018-09-28 2022-12-13 Finewell Co., Ltd. Hearing device

Also Published As

Publication number Publication date
JPWO2009141912A1 (ja) 2011-09-29

Similar Documents

Publication Publication Date Title
WO2009141912A1 (fr) Appareil écouteur
JP4683635B2 (ja) 受話装置
KR101769470B1 (ko) 만능 스피커
CN110603816B (zh) 具有电磁扬声器和微型扬声器的扬声器单元
US7324655B2 (en) Electroacoustic transducer
JP2009111820A (ja) 骨伝導イヤホン
CA2807808A1 (fr) Dispositif d'ecoute personnel
JP2012028852A (ja) 健常者用のイヤフォンとしても使用できる耳穴式骨伝導レシーバ
KR102069140B1 (ko) 전기 음향 변환 장치
JP2004147077A (ja) 複合型スピーカ
CN109309894B (zh) 电声转换装置
KR20200109406A (ko) 골전도 스피커
CN111800714B (zh) 扬声器及电子设备
JP2015109589A (ja) イヤホン
JP6322791B2 (ja) 万能スピーカ
JP2014146949A (ja) イヤホン
WO2005006809A1 (fr) Generateur piezoelectrique de vibrations et dispositif de transmission de sons vibratoires
JP6471393B2 (ja) インナーイヤー型イヤホン
JP6996853B2 (ja) 電気音響変換装置
JP2014096739A (ja) イヤホン
WO2010023755A1 (fr) Microphone et casque d'écoute à conduction osseuse
JP6221135B2 (ja) 超音波発音体、超音波素子およびこれを用いたパラメトリックスピーカ
JP6322792B2 (ja) 万能スピーカ
JP6322793B2 (ja) 万能スピーカ
JP4785197B2 (ja) 受話装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08764576

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2010512894

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08764576

Country of ref document: EP

Kind code of ref document: A1