EP1259095A2 - Microphone électrostatique - Google Patents

Microphone électrostatique Download PDF

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Publication number
EP1259095A2
EP1259095A2 EP02450091A EP02450091A EP1259095A2 EP 1259095 A2 EP1259095 A2 EP 1259095A2 EP 02450091 A EP02450091 A EP 02450091A EP 02450091 A EP02450091 A EP 02450091A EP 1259095 A2 EP1259095 A2 EP 1259095A2
Authority
EP
European Patent Office
Prior art keywords
capsule
membrane
housing
microphone
electrostatic
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP02450091A
Other languages
German (de)
English (en)
Other versions
EP1259095A3 (fr
Inventor
Pavlovic Dipl. -Ing. Gino
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AKG Acoustics GmbH
Original Assignee
AKG Acoustics GmbH
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 AKG Acoustics GmbH filed Critical AKG Acoustics GmbH
Publication of EP1259095A2 publication Critical patent/EP1259095A2/fr
Publication of EP1259095A3 publication Critical patent/EP1259095A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/04—Microphones

Definitions

  • the invention relates to electrostatic microphones with a capsule housing, in which a Membrane and a rigid electrode and optionally a friction pill and a electrical circuit are arranged on a component board.
  • the invention thus relates to electroacoustic transducers that operate as sound pickups Find application as a microphone capsule and work on an electrostatic basis. Such Regardless of their physical mode of operation, transducers have a membrane, which is exposed to the sound field and directly excited to vibrate by it becomes.
  • the electrodes of the electrostatic converter are elastic, kept under tension Membrane and a rigid electrode, which is usually only called an electrode. Make both a capacitor, the electrical capacity of which fluctuates due to pressure fluctuations Sound field changed. Because between the electrodes of the electrostatic converter electrical field is built, it is possible to accommodate the changes in capacitance of the converter Convert into electrical voltage changes with the help of a downstream amplifier.
  • Such capsules are now becoming increasingly popular in a wide range of applications miniaturized form used, be it only on mobile phones or hands-free devices in motor vehicles and the like more referenced and it requires increasing Miniaturization, especially in connection with the large numbers in which such Capsules are made that are both assembly and principal Construction as economical as possible.
  • both capsule variants are of the type shown in FIG Construction together.
  • a capsule housing 1 is a membrane ring 2, on which a membrane 3 preloaded and fastened, inserted.
  • the membrane ring 2 must have a certain Thickness because its job consists of the membrane 3 in prestressed Keep condition. This is only possible with a thickness of the membrane ring from about 0.7 to 2 mm create.
  • the membrane should form a unit with the membrane ring is sufficiently robust to process them automatically or manually.
  • a spacer ring made of a well insulating material 4.
  • the electrode 5 which after the spacer ring 4 in the capsule housing is inserted, forms the second electrode of the capacitor.
  • she is made of an electrically conductive material and has a perforation.
  • An acoustic friction 6 is located after the electrode 5. It is usually switched off Plastic manufactured in an injection molding process and has one with porous material covered or closed hole. The acoustic friction 6 is used for acoustic Tuning the microphone capsule in relation to the frequency response of the sensitivity and on the directional characteristics of the capsule.
  • the microphone capsule is from behind with a electronic print 7, on which the electronic, essential for the function of the capsule Components are attached, completed.
  • the invention has set itself the task of the number of components of such Reduce microphone capsule and simplify the construction of the capsule without doing so Losing capsule quality.
  • this goal is achieved in that the membrane with the front of the capsule housing is connected.
  • the capsule housing has in the area of its front side a ring-shaped inner shoulder on which the membrane is tensioned assembled, preferably glued. This is done, for example, with a first stamp Glue applied to the shoulder and with a second stamp the one on the stamp tensioned membrane pressed onto the shoulder and glued. Subsequently the spacer ring, the electrode, the friction pill and the print are inserted and assembled, According to the invention, the membrane ring previously required can thus be dispensed with.
  • FIG. 2 shows a solution according to the invention.
  • the microphone capsule housing 11 is provided with a step or inner shoulder 12, which makes it possible to the membrane ring to renounce. All other components of the microphone capsule according to the invention accordingly 2 are the same as the capsule according to the prior art in FIG. 1 remained.
  • the capsule housing is usually made from an aluminum sheet using the deep-drawing process it is no problem to form the shoulder 12 and thus into the capsule housing to produce integrated "membrane ring" in one operation. Because the total height the resulting microphone capsule is even smaller than in the prior art has become possible, such a capsule is space-saving and cheaper than the previous ones Capsules. Since the height (axial extension) of the microphone capsule according to FIG. 2 only is a few millimeters, the membrane is placed on the shoulder 12 inside the capsule no problem for the expert. For this purpose, a Device inserted the membrane in the pre-tensioned state in the microphone housing and glued to it in a known way.
  • FIG. 3 Another embodiment of the invention is shown in FIG. 3. It's about a Capsule housing, which differs from that of FIG. 2 in that the capsule housing is divided into two and consists of a lower housing part 21 and a capsule cover 28 consists.
  • the division of the capsule housing into two is for reasons of acoustic coordination Often found, the reason for this is:
  • the frequency response of a microphone capsule is dependent on the number and area of the sound openings 29 of the cover. Therefore the capsule housing is often divided in such a way that an attachment of different capsule lids 28 is possible. With a simple cover exchange, different ones are possible acoustic tuning of a capsule can be easily achieved.
  • the invention in turn, enables the capsule cover to be designed as shown with a shoulder 22, the entire microphone capsule becomes cheaper.
  • the microphone cover 22 can, but does not have to be made of the same material as the lower housing part 21. It is possible, for example, the lower part of the capsule housing made of aluminum and the capsule cover made of plastic. It can also be the division of the housing on another Place.
  • the invention is not restricted to the exemplary embodiments shown and described, but can be modified in various ways. So the opportunity the acoustic coordination through the interaction of parts of the device into which the Capsule is used to reach with parts of the capsule and so on the friction pill not being able to do without.
  • the formation of the shoulder can vary depending on the type of manufacture and the material of the capsule or the capsule part that carries the shoulder. In the drawing is for reasons no clarity given the clarity, it was on the usual dimensions miniaturized capsules, for example the total height and outer diameter of just a few millimeters each.
  • connection between the two parts is open Many types are possible: from friction locking to screwing to gluing all connections that are stable enough are conceivable.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
EP02450091A 2001-05-18 2002-04-17 Microphone électrostatique Withdrawn EP1259095A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT7972001 2001-05-18
AT0079701A AT409695B (de) 2001-05-18 2001-05-18 Elektrostatisches mikrofon

Publications (2)

Publication Number Publication Date
EP1259095A2 true EP1259095A2 (fr) 2002-11-20
EP1259095A3 EP1259095A3 (fr) 2008-09-03

Family

ID=3681087

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02450091A Withdrawn EP1259095A3 (fr) 2001-05-18 2002-04-17 Microphone électrostatique

Country Status (6)

Country Link
US (2) US20020172389A1 (fr)
EP (1) EP1259095A3 (fr)
JP (2) JP2002354592A (fr)
KR (1) KR100816011B1 (fr)
CN (2) CN1809221B (fr)
AT (1) AT409695B (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002345088A (ja) * 2001-05-18 2002-11-29 Mitsubishi Electric Corp 圧力感応装置及びこれに用いられる半導体基板の製造方法
WO2003086013A1 (fr) * 2002-04-05 2003-10-16 Matsushita Electric Industrial Co., Ltd. Detecteur de capacites
KR200332944Y1 (ko) * 2003-07-29 2003-11-14 주식회사 비에스이 Ｓｍｄ가능한 일렉트렛 콘덴서 마이크로폰
KR20050049181A (ko) * 2003-11-21 2005-05-25 주식회사 비에스이 Ｓｍｄ가능한 지향성 콘덴서 마이크로폰
KR100544283B1 (ko) * 2004-01-20 2006-01-24 주식회사 비에스이 표면실장을 위한 평행육면체형 콘덴서 마이크로폰
US7415121B2 (en) * 2004-10-29 2008-08-19 Sonion Nederland B.V. Microphone with internal damping
JP4150407B2 (ja) * 2005-06-20 2008-09-17 ホシデン株式会社 電気音響変換器
JP5024671B2 (ja) * 2007-12-11 2012-09-12 ソニーモバイルコミュニケーションズ株式会社 コンデンサマイクロホン及び電子機器
WO2010124099A2 (fr) * 2009-04-23 2010-10-28 Knowles Electronics, Llc Microphone équipé d'une bague de diaphragme avec une meilleure stabilité
JP2011055062A (ja) * 2009-08-31 2011-03-17 Audio Technica Corp コンデンサマイクロホンユニット
EP2312290B1 (fr) * 2009-10-16 2019-09-25 First Sensor Mobility GmbH Capteur de pression et son utilisation dans un réservoir de fluide
US9241227B2 (en) * 2011-01-06 2016-01-19 Bose Corporation Transducer with integrated sensor
US9900677B2 (en) 2015-12-18 2018-02-20 International Business Machines Corporation System for continuous monitoring of body sounds

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB257271A (en) 1925-08-19 1927-11-18 Neufeldt & Kuhnke Betr Sgesell Telephone with free vibrating diaphragm surface
DE884516C (de) 1940-12-09 1953-07-27 Siemens Ag Elektrostatisches Mikrophon
JPS58114600A (ja) 1981-12-26 1983-07-07 Toshiba Corp 静電型マイクロホン
JPH0231600A (ja) * 1988-07-21 1990-02-01 Matsushita Electric Ind Co Ltd エレクトレット・コンデンサ・マイクロホン
US5101543A (en) 1990-07-02 1992-04-07 Gentex Corporation Method of making a variable capacitor microphone
EP0531613A2 (fr) * 1991-09-09 1993-03-17 Hosiden Corporation Microphone à électrète
EP1251713A2 (fr) * 2001-04-18 2002-10-23 Sonion Microtronic Nederland B.V. Microphone cylindrique ayant un montage électret dans le couvercle d'extrémité

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1467001A (en) * 1922-06-03 1923-09-04 Elmo L Kellogg Method of anchoring microphone parts
JPS57122512A (en) * 1981-01-23 1982-07-30 Tokyo Shibaura Electric Co Electret and method of producing same
JPS5992700A (ja) * 1982-11-19 1984-05-28 Toshiba Corp コンデンサ型マイクロホン装置
JPH0736640B2 (ja) * 1985-05-20 1995-04-19 松下電器産業株式会社 エレクトレツトコンデンサマイクロホン
JPH02149199A (ja) * 1988-11-30 1990-06-07 Matsushita Electric Ind Co Ltd エレクトレットコンデンサマイクロホン
DE69022111T2 (de) * 1989-05-19 1996-03-14 Gentex Corp Verfahren zur Herstellung eines variablen Kondensator- mikrophons.
JP2577209Y2 (ja) * 1991-09-09 1998-07-23 ホシデン株式会社 エレクトレットコンデンサマイクロホンユニット
JP3401808B2 (ja) * 1992-04-16 2003-04-28 ソニー株式会社 電荷転送装置
JPH062899U (ja) * 1992-06-12 1994-01-14 株式会社プリモ エレクトレットコンデンサマイクロホン素子
US5616264A (en) * 1993-06-15 1997-04-01 Tokyo Electron Limited Method and apparatus for controlling temperature in rapid heat treatment system
IL115130A (en) * 1995-09-01 1999-09-22 Israel State Method and device for ozone sterilization of objects
JPH10145895A (ja) * 1996-11-12 1998-05-29 Sony Corp コンデンサ・マイクロフォン
JP3505147B2 (ja) * 1998-03-18 2004-03-08 バイオスフィア テクノロジーズ インコーポレイテッド 有機廃物を生物改質して変性され無菌の栄養素製品を作り出す方法
JP3378197B2 (ja) * 1998-05-11 2003-02-17 ホシデン株式会社 半導体エレクトレットコンデンサーマイクロホン
JP3980193B2 (ja) * 1998-09-04 2007-09-26 株式会社オーディオテクニカ 狭指向性コンデンサマイクロホン
JP3472493B2 (ja) * 1998-11-30 2003-12-02 ホシデン株式会社 半導体エレクトレットコンデンサーマイクロホン
JP2002142295A (ja) * 2000-10-30 2002-05-17 Star Micronics Co Ltd コンデンサマイクロホン

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB257271A (en) 1925-08-19 1927-11-18 Neufeldt & Kuhnke Betr Sgesell Telephone with free vibrating diaphragm surface
DE884516C (de) 1940-12-09 1953-07-27 Siemens Ag Elektrostatisches Mikrophon
JPS58114600A (ja) 1981-12-26 1983-07-07 Toshiba Corp 静電型マイクロホン
JPH0231600A (ja) * 1988-07-21 1990-02-01 Matsushita Electric Ind Co Ltd エレクトレット・コンデンサ・マイクロホン
US5101543A (en) 1990-07-02 1992-04-07 Gentex Corporation Method of making a variable capacitor microphone
EP0531613A2 (fr) * 1991-09-09 1993-03-17 Hosiden Corporation Microphone à électrète
EP1251713A2 (fr) * 2001-04-18 2002-10-23 Sonion Microtronic Nederland B.V. Microphone cylindrique ayant un montage électret dans le couvercle d'extrémité

Also Published As

Publication number Publication date
US20020172389A1 (en) 2002-11-21
JP2002354592A (ja) 2002-12-06
JP2008054345A (ja) 2008-03-06
ATA7972001A (de) 2002-02-15
US7873176B2 (en) 2011-01-18
KR100816011B1 (ko) 2008-03-24
CN1809221B (zh) 2012-01-18
AT409695B (de) 2002-10-25
CN1809221A (zh) 2006-07-26
KR20020089145A (ko) 2002-11-29
US20080273736A1 (en) 2008-11-06
EP1259095A3 (fr) 2008-09-03
CN1387350A (zh) 2002-12-25

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