EP1253802A2 - Suspension pour une capsule microphonique - Google Patents

Suspension pour une capsule microphonique Download PDF

Info

Publication number
EP1253802A2
EP1253802A2 EP02450062A EP02450062A EP1253802A2 EP 1253802 A2 EP1253802 A2 EP 1253802A2 EP 02450062 A EP02450062 A EP 02450062A EP 02450062 A EP02450062 A EP 02450062A EP 1253802 A2 EP1253802 A2 EP 1253802A2
Authority
EP
European Patent Office
Prior art keywords
capsule
microphone
cover
perforated disc
storage
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
EP02450062A
Other languages
German (de)
English (en)
Other versions
EP1253802B1 (fr
EP1253802A3 (fr
Inventor
Gino Dipl.-Ing. Pavlovic
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 EP1253802A2 publication Critical patent/EP1253802A2/fr
Publication of EP1253802A3 publication Critical patent/EP1253802A3/fr
Application granted granted Critical
Publication of EP1253802B1 publication Critical patent/EP1253802B1/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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for microphones

Definitions

  • the invention relates to a microphone capsule mounting which is built into the microphone housing and serves as an elastic suspension of the microphone capsule built into the microphone.
  • the mechanical system microphone capsule and elastic suspension or elastic storage can be seen as a mass-spring system.
  • the differential equation the solutions of which one represents complete description of the mechanical system. From a purely formal point of view, the aforementioned differential equation of the mechanical resonant circuit (mass-spring damping) completely a differential equation of the electrical resonant circuit (inductance-capacitance-resistance) corresponds, you can with the help of analogy calculations perform an analysis in an electrical domain.
  • the mass (m) corresponds to the inductance (L), the spring (c) to the capacitance (C) and the Damping (k) the ohmic resistance (R).
  • the electrical filter is tuned so that low frequencies are cut off electrically. Since an electrical filter is not can distinguish between useful and interference signal is when the impact sound filter is switched on unwanted, useful noise is also attenuated depending on the frequency, depending on the filter characteristic. Put simply, the good microphone becomes an inferior microphone demoted.
  • the invention has set itself the task of elastic storage for microphone capsules to create these and other negative properties of the bearings according to the Does not have prior art.
  • the storage should also be simple on the respective Capsule type and the respective area of application can be adapted.
  • the invention solves this problem in that it comprises the three elements of mechanical Resonant circuit, the mass m of the capsule, the suspension c of the bearing and the damping k of the bearing (in the electrical equivalent: R, C and L) forms as separate elements. This is preferably done as follows:
  • the capsule (L) is attached using two membranes.
  • the membranes are made of materials manufactured that have no or very little internal damping. Thereby can be seen and treated as pure spring elements (C). Because the membranes in contrast to the prior art, there is no need for internal damping (and also should not have), there is an incomparably larger number of Materials available as in the prior art.
  • the damping element (R) is also designed as a separate component, which also leads to completely new possibilities for a solution.
  • a microphone capsule 1 by means of two Ring membranes 2, 3 connected to a storage box 4, preferably by gluing.
  • the capsule 1 protrudes, as indicated by the thin or dashed lines, over the upper membrane 2, while the lower membrane 3 is essentially flush with the bottom of the capsule.
  • the dashed part 13 of the actual capsule while the thickly extended part one to acoustic tuning is necessary volume, the walls of which are with the actual Capsule are immovably connected, so that it is still within the meaning of the present invention belongs to the capsule. If such a volume is not necessary, it can of course be omitted.
  • a lid 5 is screwed on sits at least essentially airtight on the storage can and with at least one small one Opening 7 is provided.
  • the lower membrane 3 forms with the lid 5 a closed volume 6, which is only by means of the small opening 7 at the bottom is open to the outside.
  • the opening 7 is preferably half (bad) with the air permeable material 8 covered or filled.
  • the material 8 can, for example, felt, PU foam, fleece, a fabric made of plastic or natural fibers or a metal mesh. It does not have to be under tissue classic structure created by weaving can also be understood trade so-called "non-woven tissue”.
  • the mass of the microphone capsule 1 and the spring properties of the ring membranes 2, 3 form a mechanical resonant circuit whose resonance frequency, as described above, "chosen” and by the choice of material and dimensions of the ring membranes 2, 3 (and in special cases by weighting the capsule 1).
  • a material PC membranes, aluminum, copper and steel are used for membranes 2 and 3 or brass, each in the form of a foil and preferably in a thickness of 0.01 mm to 1 mm.
  • the assembly of this ensemble in the respective device or housing is done either via the storage box 4 or the lid 5, but in any case so that the movements of the microphone capsule 1 not be hindered.
  • FIG. 2 shows examples of the course of the amplitude that can be achieved according to the invention the frequency with different damping constants (R), as for example due to different materials 8 and / or different dimensions of the hole 7 can be achieved.
  • the curve R shows the vibration behavior with low friction and the curve G in comparison with greater friction. From Fig. 2 it can be seen that by changing the friction value the vibration behavior in a very can change large extent without sacrificing the resonance frequency of the mechanical system to change significantly.
  • FIG. 3 shows another possible embodiment of the friction element. It acts it is a variant that allows desired changes in the coefficient of friction easy and simple to do.
  • the lid 5 on its side facing away from the capsule with a perforated disk 9 provided that has at least one through hole 10.
  • a poorly permeable material 8 Between the bottom surface of the Cover 5 and the perforated disk 9 is a poorly permeable material 8, which not only closes the opening 7 in the lid 5 in this embodiment or covers, but essentially the entire area between the cover 5 and the perforated disc 9 occupies.
  • the perforated disc 9 is screwed to the cover 5, so that by tightening screws or tightening the perforated disk 9 less tightly, the flow properties the air passage from the small opening 7 through which the air is bad permeable material 8 and the hole or holes 10 can be changed. To this In this way, it is possible to dampen the capsule bearing simply and precisely, in fact infinitely variable, and so adapt to different applications and installation situations adapt.
  • the position of the opening 7 or of the hole 10 can be adjusted by rotating the perforated disk 9 of the cover 5, the length a of the flow path of the reciprocating air be changed and so is the friction and thus the damping of the vibrations the capsule.
  • Refinements relate, for example, to the possibility of this air flowing through dampen additional elements in a reproducible manner.
  • Another configuration relates to the possibility of the microphone housing in connection with the invention Use damping device to make the acoustic tuning of the transducer.

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • 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)
EP02450062A 2001-04-24 2002-03-15 Suspension pour une capsule microphonique Expired - Lifetime EP1253802B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT6582001 2001-04-24
AT0065801A AT413924B (de) 2001-04-24 2001-04-24 Mikrofonkapsellagerung

Publications (3)

Publication Number Publication Date
EP1253802A2 true EP1253802A2 (fr) 2002-10-30
EP1253802A3 EP1253802A3 (fr) 2008-12-31
EP1253802B1 EP1253802B1 (fr) 2011-05-25

Family

ID=3678356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02450062A Expired - Lifetime EP1253802B1 (fr) 2001-04-24 2002-03-15 Suspension pour une capsule microphonique

Country Status (5)

Country Link
US (1) US7013017B2 (fr)
EP (1) EP1253802B1 (fr)
JP (1) JP3953356B2 (fr)
CN (1) CN1254150C (fr)
AT (2) AT413924B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1805609B (zh) * 2005-01-14 2011-01-12 音响技术株式会社 带有可旋转的电缆连接件的表面放置的声音捕获话筒
US8396242B2 (en) 2005-07-25 2013-03-12 Fujitsu Limited Sound receiver
DE102008045718B4 (de) 2007-09-07 2019-05-23 Kabushiki Kaisha Audio-Technica Mikrofonhalterung

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2504778A1 (fr) * 2005-01-24 2006-07-24 Noland Lewis Capuchon d'isolation acoustique pour sonometre
KR100638057B1 (ko) * 2005-02-21 2006-10-24 주식회사 비에스이 이중 진동판 구조의 마이크로 스피커
JP2006295272A (ja) * 2005-04-06 2006-10-26 Sony Corp 撮像装置
GB0601338D0 (en) * 2006-01-24 2006-03-01 Rycote Microphone Windshields Improved suspension device
US7723596B2 (en) * 2006-06-23 2010-05-25 Jeffery Kelly Stabilizing holder for sensory device
US8295538B2 (en) * 2008-08-22 2012-10-23 Harman Becker Automotive Systems Gmbh Loudspeaker spider
US8948434B2 (en) 2013-06-24 2015-02-03 Michael James Godfrey Microphone
JP6521601B2 (ja) * 2014-10-03 2019-05-29 キヤノン株式会社 円筒体保持装置
JP6516626B2 (ja) * 2015-08-17 2019-05-22 株式会社オーディオテクニカ マイクロホン装置
TWI706678B (zh) 2019-05-14 2020-10-01 佳樂電子股份有限公司 具有背腔的傳聲器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6128393A (en) 1998-02-27 2000-10-03 Kabushiki Kaisha Audio-Technica Microphone with shock-resistant means

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653625A (en) * 1969-11-03 1972-04-04 Shure Bros Microphone shock-mounting apparatus
AT371656B (de) * 1981-09-24 1983-07-25 Akg Akustische Kino Geraete Lagerung fuer elektroakustische wandler
DE3207695A1 (de) * 1982-03-04 1983-09-15 Hagenuk GmbH, 2300 Kiel Fernsprechmikrofon
US5014322A (en) * 1987-03-04 1991-05-07 Hosiden Electronics Co., Ltd. Diaphragm unit of a condenser microphone, a method of fabricating the same, and a condenser microphone
JP4106119B2 (ja) * 1997-12-26 2008-06-25 株式会社オーディオテクニカ ダイナミックマイクロホン
JP4000217B2 (ja) * 1998-05-15 2007-10-31 株式会社オーディオテクニカ マイクロホン

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6128393A (en) 1998-02-27 2000-10-03 Kabushiki Kaisha Audio-Technica Microphone with shock-resistant means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1805609B (zh) * 2005-01-14 2011-01-12 音响技术株式会社 带有可旋转的电缆连接件的表面放置的声音捕获话筒
US8396242B2 (en) 2005-07-25 2013-03-12 Fujitsu Limited Sound receiver
DE102008045718B4 (de) 2007-09-07 2019-05-23 Kabushiki Kaisha Audio-Technica Mikrofonhalterung

Also Published As

Publication number Publication date
AT413924B (de) 2006-07-15
CN1399495A (zh) 2003-02-26
CN1254150C (zh) 2006-04-26
JP2002354570A (ja) 2002-12-06
EP1253802B1 (fr) 2011-05-25
EP1253802A3 (fr) 2008-12-31
ATA6582001A (de) 2005-10-15
ATE511319T1 (de) 2011-06-15
JP3953356B2 (ja) 2007-08-08
US7013017B2 (en) 2006-03-14
US20040151335A1 (en) 2004-08-05

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