EP3544317A1 - Microphone à condensateur avec un anneau de céramique - Google Patents

Microphone à condensateur avec un anneau de céramique Download PDF

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Publication number
EP3544317A1
EP3544317A1 EP18163360.3A EP18163360A EP3544317A1 EP 3544317 A1 EP3544317 A1 EP 3544317A1 EP 18163360 A EP18163360 A EP 18163360A EP 3544317 A1 EP3544317 A1 EP 3544317A1
Authority
EP
European Patent Office
Prior art keywords
membrane
ring
condenser microphone
holding
electrodes
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.)
Pending
Application number
EP18163360.3A
Other languages
German (de)
English (en)
Inventor
Dieter Rapitsch
Christoph Frank
Mathias Balac
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.)
Austrian Audio GmbH
Original Assignee
Austrian Audio 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 Austrian Audio GmbH filed Critical Austrian Audio GmbH
Priority to EP18163360.3A priority Critical patent/EP3544317A1/fr
Priority to US16/361,958 priority patent/US10602280B2/en
Publication of EP3544317A1 publication Critical patent/EP3544317A1/fr
Pending 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/04—Microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/005—Electrostatic transducers using semiconductor materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/003—Mems transducers or their use
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the invention relates to a condenser microphone according to the preamble of claim 1.
  • Such microphones can either be so-called “real” condenser microphones in which the polarization voltage is applied externally, or so-called electret microphones, which have permanently charged membranes in the course of the manufacturing process. Furthermore, the invention relates both capsules or microphones with a membrane and with two membranes.
  • the electrically conductive elements are usually made of brass, which is coated with gold in many cases, at least at the crucial parts of the surface and has a modulus of elasticity of about 100 GPa, the density of the material is around 8,000 kg / m 3 and is therefore very high ,
  • the insulating material used is mostly polyoxymethylene (POM) whose modulus of elasticity is less than 3 GPa and whose density is only about 1.4 kg / m 3 .
  • the electrical resistance is 10 13 ⁇ m.
  • POM absorbs water to a relatively small extent, about 0.2% by weight, but still results in a decrease in insulating properties.
  • a ceramic material in particular zirconium oxide (ZrO 2 ), is provided for such a material.
  • Zrconia is stiffer than brass with a modulus of elasticity of about 200 GPa and is almost as insulating as POM with a resistance of at least 10 11 m, and moreover has the advantage of not absorbing moisture.
  • the density of the zirconia is 6,000 kg / m 3 , it is very dense and the corresponding component correspondingly heavy, which has the advantage that with this ring stiffer rubber materials can be used as mechanical insulation for structure-borne sound insulation as in the prior art ; these stiffer rubbers have higher Shore hardness and are significantly more durable than the materials used in the prior art.
  • the Fig. 1 shows a schematic axial section of a microphone according to the invention:
  • a membrane ring 2 biases a membrane 1 by means of an insulating spacer ring 3 and an annular insulator 7 at a distance over a disc-shaped electrode 5.
  • This electrode 5 has openings 6 which the space between the electrode and the Connect the membrane to the space on the other side of the electrode.
  • a so-called acoustic friction 8 for example a web or a foam, which serves to tune the microphone. All of this is state of the art and needs no further explanation.
  • the membrane ring 2 and / or the annular insulator 7 consist of ceramic material. They are by means of screws 4, optionally made of electrically insulating material, in particular also ceramic material, connected to each other and thus clamp the membrane 1 a.
  • the Fig. 2 shows the situation in the case of a microphone with two membranes.
  • a microphone consists of two microphones, each with a membrane 1, which are connected to one another in an electrode-to-electrode manner.
  • the electrodes are located at a close distance from each other. This distance is determined by the role of the acoustic friction, which thereby assumes the disk-shaped cavity or slot 8 'thus formed between the mutually facing end faces of the two electrodes 5.
  • the two microphone parts are connected in a manner not shown (eg by the housing or the capsule and / or the other components) with each other or are held in this position, optionally with an intermediate ring, not shown. It is of course possible to connect the two components by means of at least one spacer and through screws instead of / in addition to the screws 4 in order to facilitate their handling and assembly. It is also possible to hold both electrodes with an annular insulator or to ensure the configuration shown in the capsule after, if appropriate, successive introduction by clamping. With knowledge of the invention, it is easy for the person skilled in the art to select the appropriate embodiments for the individual fields of application.
  • the Fig. 3 shows a plan view in the direction of arrow III of Fig. 2 , the ceramic diaphragm ring 2, the screws 4 and the diaphragm 1 are clearly visible.
  • the Fig. 4 shows, purely schematically, a variant of Fig. 1 with a retaining ring 9 made of ceramic material and an insulating disc 7, on the one hand together with the retaining ring 9 holds the electrode and the membrane 1 together with their rings, on the other hand, an acoustic friction 8, shown as a permeable material fixed.
  • the insulator 7 only has to be generally annular, in the sense that it surrounds and holds the electrode 5 at its circumference and, in the sense that it interacts with the membrane ring 2, around the membrane 1 hold. Otherwise it can be adapted to the respective installation situation and have corresponding projections, shoulders, noses, notches, etc.
  • the screws 4 may be made of ceramic material, they may be formed with countersunk heads, which are completely immersed in recesses in the respective ring, and the like.
  • bottom range means the bottom quarter, and especially an even smaller portion; while “middle range” means the middle third of the total height (width - length). All this information has its usual meaning, applied to the intended position of the object under consideration.
  • substantially means a deviation of up to 10% of the declared value, if physically possible is, both down and up, otherwise only in the meaningful direction, with degrees (angle and temperature) are thus ⁇ 10 ° meant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
EP18163360.3A 2018-03-22 2018-03-22 Microphone à condensateur avec un anneau de céramique Pending EP3544317A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18163360.3A EP3544317A1 (fr) 2018-03-22 2018-03-22 Microphone à condensateur avec un anneau de céramique
US16/361,958 US10602280B2 (en) 2018-03-22 2019-03-22 Condenser microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18163360.3A EP3544317A1 (fr) 2018-03-22 2018-03-22 Microphone à condensateur avec un anneau de céramique

Publications (1)

Publication Number Publication Date
EP3544317A1 true EP3544317A1 (fr) 2019-09-25

Family

ID=61800327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18163360.3A Pending EP3544317A1 (fr) 2018-03-22 2018-03-22 Microphone à condensateur avec un anneau de céramique

Country Status (2)

Country Link
US (1) US10602280B2 (fr)
EP (1) EP3544317A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111343523B (zh) * 2020-02-28 2021-11-30 广州市天历德电子科技有限公司 一种音响网罩的拆装装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151799A (ja) * 1982-03-05 1983-09-09 Matsushita Electric Ind Co Ltd 静電型マイクロホン
US20130044899A1 (en) * 2011-08-15 2013-02-21 Harman International Industries, Inc. Dual Backplate Microphone

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5600610A (en) * 1995-01-31 1997-02-04 Gas Research Institute Electrostatic transducer and method for manufacturing same
JP4751057B2 (ja) * 2004-12-15 2011-08-17 シチズン電子株式会社 コンデンサマイクロホンとその製造方法
JP2007043327A (ja) * 2005-08-01 2007-02-15 Star Micronics Co Ltd コンデンサマイクロホン
JP4944760B2 (ja) * 2007-12-27 2012-06-06 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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151799A (ja) * 1982-03-05 1983-09-09 Matsushita Electric Ind Co Ltd 静電型マイクロホン
US20130044899A1 (en) * 2011-08-15 2013-02-21 Harman International Industries, Inc. Dual Backplate Microphone

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GRIESE H J: "SELF-CALIBRATING CONDENSER MICROPHONE WITH INTEGRAL RF CIRCUITRY FOR ACOUSTICAL MEASUREMENTS", JOURNAL OF THE AUDIO ENGINEERING SOCIETY, AUDIO ENGINEERING SOCIETY, NEW YORK, NY, US, vol. 14, no. 1, 1 January 1966 (1966-01-01), pages 47 - 49, XP000796375, ISSN: 1549-4950 *

Also Published As

Publication number Publication date
US10602280B2 (en) 2020-03-24
US20190297430A1 (en) 2019-09-26

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