EP1122977A2 - Microphone - Google Patents

Microphone Download PDF

Info

Publication number
EP1122977A2
EP1122977A2 EP01100976A EP01100976A EP1122977A2 EP 1122977 A2 EP1122977 A2 EP 1122977A2 EP 01100976 A EP01100976 A EP 01100976A EP 01100976 A EP01100976 A EP 01100976A EP 1122977 A2 EP1122977 A2 EP 1122977A2
Authority
EP
European Patent Office
Prior art keywords
microphone
capsule
board
microphone capsule
circuit board
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.)
Granted
Application number
EP01100976A
Other languages
German (de)
English (en)
Other versions
EP1122977B1 (fr
EP1122977A3 (fr
Inventor
Klaus Roderner
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.)
Paragon AG
Original Assignee
Paragon AG
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 Paragon AG filed Critical Paragon AG
Publication of EP1122977A2 publication Critical patent/EP1122977A2/fr
Publication of EP1122977A3 publication Critical patent/EP1122977A3/fr
Application granted granted Critical
Publication of EP1122977B1 publication Critical patent/EP1122977B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces

Definitions

  • the invention relates to a microphone module with the in the preamble of claim 1 specified features.
  • DE 43 10 793 A1 describes a structure-borne sound microphone for installation known in a helmet (motorcycle, fire brigade, etc.) in which a flat body with a Velcro fastener on the Inside of the helmet can be attached and the microphone in one on the opposite side of the body Rubber bellows is arranged so that it is when the Helmes is pressed against the head and the when speaking Skull cap picks up structure-borne noise.
  • the flat basic body also contains a circuit board with a microphone amplifier.
  • a digital hearing aid is known from DE 195 45 760 Cl, where the microphone amplifier inside the hearing aid housing is surrounded by its own shield, in which an A / D converter is also provided, so that the complete analog Input part of the hearing aid against electromagnetic interference is shielded.
  • the microphone capsule For various applications, such as hands-free systems for car phones, Radiotelephony systems, paging systems etc. are used one microphone modules in which the microphone capsule immediately is assembled with a preamp so the weak ones Microphone signals affected as little as possible by interfering interference which make the intelligibility worse.
  • the preamplifier is implemented on a circuit board the microphone capsule is attached via a rubber holder, and to shield the amplifier on both sides of the Circuit board shielding hoods placed on both the components on the one hand as well as the printed conductor tracks on the shield the other side against interference from the environment.
  • the invention is based, such a microphone module the task with regard to its shielding against interference further improve with the possibility of the directional characteristic maintain the microphone, if not improve it.
  • the board lamination As a shield instead there is no need to form a conductor track Shield the lamination side of the board so that only the Component side, on which the connecting conductor is also provided are shielded.
  • the invention provides for this a half shell or tub, the edges of which are covered with board be soldered all around, so that one against Interference interference absolutely tight connection.
  • the one on the Microphone capsule metallized on the rear side can be used without fit another in this tub, with its metal housing one continuous contact with the shielding trough, which at Insert the module in a housing by applying pressure from the outside is intensified.
  • the rear metallization of the microphone capsule can also be easily with the metal lamination of the Solder the board, which on the one hand uses the microphone on the board attached and on the other hand also a good shield between Microphone capsule and board is reached.
  • the microphone capsule obliquely on the board attached so that the longitudinal axis of the microphone capsule one Forms an angle with the board surface. Has an angle of 22 ° proved to be particularly favorable here.
  • Figure 1 shows a microphone capsule 2, the end of an amplifier board 4 sits. You can also see one drawn as a phantom Shielding trough 6, which the lower side of the board 4 with the components 8 and the lower half of the microphone capsule 2 encloses.
  • a connecting cable 10 leads from the board to one subordinate circuit, not shown here, in which the microphone signals are processed.
  • the circuit board is on the surface facing upwards in the figures 4 provided with a continuous metal lamination 12, which not used here as usual for the formation of the conductor tracks is, which in the present case on the opposite Component side run. Rather, the lamination forms the usually made of copper, a closed surface, which shields the electrical circuit of the amplifier board upwards.
  • the shielding down is done by the shielding trough 6, which the component 8 and those running between them Encloses ladder.
  • the microphone capsule 2 is also half-sided on its back metallized in the form of a shield 14, which in the figures as well as the copper cladding 12 shown cross-hatched is.
  • the orientation of the microphone capsule 2 opposite the board 4 is made so that on the side edge of the board which the microphone capsule 2 rests, the two laminations 12 and 14 can be soldered to one another, with which on the one hand the microphone capsule is attached to the circuit board and on the other hand the shielding by the circuit board lamination 12 the microphone capsule lamination 14 continues.
  • the microphone capsule 2 sits somewhat obliquely on the circuit board 4, what to be explained with the directional characteristic of the microphone.
  • the shielding trough 6 is on the right in FIG. 1 an end plate 16 closed, for example with the tub 6 can be soldered.
  • the Microphone capsule 2 fitted into the tub 6 so that its rounding exactly matches the round cross-section of the tub and a continuous touch of the metallic capsule housing done with the sheet metal tub with contact. If the illustrated Module after completion in an example Plastic housing is used, then presses this from the outside against the line of contact between the shielding trough and microphone capsule edge, so that here no soldering with the housing capsule is necessary, which is also due to that when soldering heating of the housing capsule to damage the Microphone membrane would lead.
  • solder seams and the touch of the the lower edge of the microphone capsule with the shielding trough 6 in connection with the shield 14 on the back of the microphone and their metal capsule, to which in turn the Shielding tub 6 connects an interference-resistant shield the amplifier circuit on the board, so that even weak ones Microphone signals passed without interference to the subsequent circuit become.
  • the targeted compensation of sound pressure allow for membrane movements so that e.g. kidney-shaped directional characteristic results.
  • the invention sees two corresponding to these openings 22, for example semicircular recesses 24 on the with the microphone capsule 2nd soldering edge of the amplifier board 4 through which a Connection of the openings 22 to the environment is established, so that the directional characteristic of the microphone even when attached Amplifier board 2 and shielding trough 6 are retained, or can even be improved.
  • This Directional characteristic is also the microphone capsule 2 at an angle the board attached, with the central axis of the microphone capsule 2 an angle with the plane of the board 4 in the special case of 22 °.

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)
  • Telephone Set Structure (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
EP01100976A 2000-02-02 2001-01-17 Microphone Expired - Lifetime EP1122977B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10004408 2000-02-02
DE10004408A DE10004408C1 (de) 2000-02-02 2000-02-02 Mikrofonmodul

Publications (3)

Publication Number Publication Date
EP1122977A2 true EP1122977A2 (fr) 2001-08-08
EP1122977A3 EP1122977A3 (fr) 2005-05-11
EP1122977B1 EP1122977B1 (fr) 2006-11-22

Family

ID=7629487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01100976A Expired - Lifetime EP1122977B1 (fr) 2000-02-02 2001-01-17 Microphone

Country Status (4)

Country Link
US (1) US6643380B2 (fr)
EP (1) EP1122977B1 (fr)
AT (1) ATE346474T1 (fr)
DE (2) DE10004408C1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4310234B2 (ja) * 2004-05-18 2009-08-05 株式会社オーディオテクニカ コンデンサマイクロホン
JP4393297B2 (ja) * 2004-07-14 2010-01-06 株式会社オーディオテクニカ コンデンサマイクロホン
US7270010B2 (en) * 2004-08-27 2007-09-18 Ashcroft-Nagano, Inc. System and method for pressure measurement
JP4452584B2 (ja) * 2004-08-31 2010-04-21 株式会社オーディオテクニカ コンデンサマイクロホン
US7660428B2 (en) * 2004-10-25 2010-02-09 Polycom, Inc. Ceiling microphone assembly
JP4471818B2 (ja) * 2004-11-17 2010-06-02 株式会社オーディオテクニカ バウンダリーマイクロホン
JP4724410B2 (ja) * 2004-11-19 2011-07-13 株式会社オーディオテクニカ コンデンサマイクロホン
JP5639845B2 (ja) * 2010-10-25 2014-12-10 株式会社オーディオテクニカ バウンダリーマイクロホン
CN102333253A (zh) * 2011-07-26 2012-01-25 歌尔声学股份有限公司 一种麦克风及其测试方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399703A (en) * 1980-10-16 1983-08-23 Dymax Corporation Ultrasonic transducer and integral drive circuit therefor
CH664057A5 (de) * 1984-02-27 1988-01-29 Phonak Ag Hoergeraet.
DE4310793A1 (de) * 1993-04-02 1994-10-06 Ceotronics Gmbh Elektronische Körperschall-Mikrofon für Schutzhelme oder dergleichen
DE4343702C1 (de) * 1993-12-21 1995-03-09 Siemens Audiologische Technik Am Kopf tragbares Hörgerät
JPH09107192A (ja) * 1995-10-09 1997-04-22 Kitagawa Ind Co Ltd プリント基板およびケース兼用プリント基板ならびに携帯型通信機器
DE19545760C1 (de) * 1995-12-07 1997-02-20 Siemens Audiologische Technik Digitales Hörgerät
US5740261A (en) * 1996-11-21 1998-04-14 Knowles Electronics, Inc. Miniature silicon condenser microphone
US6157546A (en) * 1999-03-26 2000-12-05 Ericsson Inc. Shielding apparatus for electronic devices

Also Published As

Publication number Publication date
ATE346474T1 (de) 2006-12-15
DE10004408C1 (de) 2001-06-21
EP1122977B1 (fr) 2006-11-22
EP1122977A3 (fr) 2005-05-11
DE50111474D1 (de) 2007-01-04
US6643380B2 (en) 2003-11-04
US20010012374A1 (en) 2001-08-09

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