EP3544317A1 - Condenser microphone with ring made of ceramic - Google Patents

Condenser microphone with ring made of ceramic Download PDF

Info

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.)
Granted
Application number
EP18163360.3A
Other languages
German (de)
French (fr)
Other versions
EP3544317B1 (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/EP3544317B1/en
Priority to US16/361,958 priority patent/US10602280B2/en
Publication of EP3544317A1 publication Critical patent/EP3544317A1/en
Application granted granted Critical
Publication of EP3544317B1 publication Critical patent/EP3544317B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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)

Abstract

Die Erfindung betrifft ein Kondensator-Mikrofon mit zumindest einer Membrane (1), zumindest einer der Membrane (1) zugeordneten Elektrode (5), zumindest einem ringförmigen Isolator (7), der die Elektrode (5) hält, mit zumindest einem die Membrane (1) haltenden Membranring (2) und gegebenenfalls einem die genannten Bauteile haltenden Haltering (9).Zur Verbesserung der mechanischen und elektrischen Eigenschaften ist vorgesehen, dass der Membranring (2) und/oder der ringförmige Isolator (7) und/oder der Haltering (9) aus keramischem Material bestehen. Bevorzugt ist das keramische Material Zirconiumoxid.The invention relates to a condenser microphone having at least one membrane (1), at least one electrode (5) associated with the membrane (1), at least one annular insulator (7) holding the electrode (5) with at least one membrane (1). 1) holding diaphragm ring (2) and optionally a holding said components retaining ring (9) .To improve the mechanical and electrical properties is provided that the diaphragm ring (2) and / or the annular insulator (7) and / or the retaining ring ( 9) consist of ceramic material. Preferably, the ceramic material is zirconium oxide.

Description

Die Erfindung betrifft ein Kondensator-Mikrofon entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a condenser microphone according to the preamble of claim 1.

Derartige Mikrofone können entweder sogenannte "echte" Kondensator-Mikrofone sein, bei denen die Polarisationsspannung extern aufgebracht wird, oder sogenannte Elektret-Mikrofone, die im Zuge des Herstellungsverfahrens permanent geladene Membranen aufweisen. Weiters betrifft die Erfindung sowohl Kapseln bzw. Mikrofone mit einer Membran als auch mit zwei Membranen.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.

An die im Folgenden summarisch als "Kondensator-Mikrofon" bezeichneten Mikrofone verwendeten Materialien werden extreme Anforderungen gestellt, insbesondere im Hinblick auf ihre elektrische Leitfähigkeit, aber auch im Hinblick auf ihre mechanischen Eigenschaften. Die elektrisch leitfähigen Elemente bestehen üblicherweise aus Messing, das in vielen Fällen zumindest an den entscheidenden Teilen der Oberfläche mit Gold beschichtet ist und einen Elastizitätsmodul von etwa 100 GPa aufweist, die Dichte des Materials liegt rund um 8.000 kg/m3 und ist somit sehr hoch.Extreme demands are placed on the materials used in the following as "condenser microphone", in particular with regard to their electrical conductivity, but also with regard to their mechanical properties. 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 ,

Als isolierendes Material wird zumeist Polyoxymethylen (POM) verwendet, dessen Elastizitätsmodul kleiner als 3 GPa ist und dessen Dichte bei nur etwa 1,4 kg/m3 liegt. Der elektrische Widerstand liegt bei 1013 Ω m. POM absorbiert Wasser zu einem relativ geringem Ausmaß, etwa 0,2 Gew.-%, was aber dennoch zu einer Abnahme der isolierenden Eigenschaften führt.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 Ω m. POM absorbs water to a relatively small extent, about 0.2% by weight, but still results in a decrease in insulating properties.

Es gibt nun Anwendungsfälle, in denen die Verwendung eines hervorragend isolierenden und dennoch mechanisch sehr steifen Materials nützlich wäre. Ein Bauteil für den dies besonders zutrifft, ist der Membranring, der unter Umständen auch verwendet wird um verschiedene Bauteile zusammenzupressen oder ein Ring, der einen solchen Membranring aus anderem Material umfasst.There are now applications in which the use of a highly insulating and yet mechanically very stiff material would be useful. One component of this is particularly the membrane ring, which may also be used to compress various components or a ring that includes such a membrane ring of other material.

Es ist Ziel und Aufgabe der Erfindung ein solches Material anzugeben.It is the object and object of the invention to specify such a material.

Erfindungsgemäß wird für ein solches Material ein keramisches Material, insbesondere Zirconiumoxid (ZrO2) vorgesehen. Zirconiumoxid ist steifer als Messing mit einem Elastizitätsmodul von etwa 200 GPa und fast so gut isolierend wie POM mit einem Widerstand von zumindest 1011 m und weist darüber hinaus den Vorteil auf, keine Feuchtigkeit zu absorbieren.According to the invention, a ceramic material, in particular zirconium oxide (ZrO 2 ), is provided for such a material. Zirconia 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.

Da die Dichte des Zirconiumoxids bei 6.000 kg/m3 liegt, ist es sehr dicht und der entsprechende Bauteil entsprechend schwer, was den Vorteil hat, dass mit diesem Ring steifere Gummimaterialien als mechanische Isolierung für Körperschall-Isolierung als im Stand der Technik verwendet werden können; diese steiferen Gummimaterialien haben höhere Shore-Härten und sind deutlich haltbarer als die im Stand der Technik verwendbaren Materialien.Since 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.

Die Erfindung wird im Folgenden anhand der Zeichnung näher erläutert. Darin zeigt

  • die Fig. 1 einen rein schematischen Schnitt durch die wesentlichsten Bauteile eines Kondensator-Mikrofons, nämlich Elektrode und Membrane,
  • die Fig. 2 einen entsprechenden Schnitt durch ein Kondensator-Mikrofon mit zwei Elektroden und Membrane,
  • die Fig. 3 eine Draufsicht in Richtung des Pfeiles III der Fig. 2.,
  • die Fig. 4 eine Variante der Fig. 1 und
  • die Figs. 5 und 6 eine Variante der Figs. 2 und 3.
The invention will be explained in more detail below with reference to the drawing. It shows
  • the Fig. 1 a purely schematic section through the most essential components of a condenser microphone, namely electrode and diaphragm,
  • the Fig. 2 a corresponding section through a condenser microphone with two electrodes and membrane,
  • the Fig. 3 a plan view in the direction of arrow III of Fig. 2 .,
  • the Fig. 4 a variant of Fig. 1 and
  • the Figs. 5 and 6 a variant of Figs. 2 and 3 ,

Die Fig. 1 zeigt in einem schematischen Axialschnitt ein erfindungsgemäßes Mikrofon: Ein Membranring 2 spannt eine Membrane 1 mittels eines isolierenden Distanzringes 3 und eines ringförmigen Isolators 7 im Abstand über eine scheibenförmige Elektrode 5. Diese Elektrode 5 weist Öffnungen 6 auf, die den Zwischenraum zwischen der Elektrode und der Membrane mit dem Raum auf der anderen Seite der Elektrode verbinden. Dort ist eine sogenannte akustische Reibung 8, beispielsweise ein Gespinst oder ein Schaumstoff, vorgesehen, die zur Abstimmung des Mikrofons dient. All dies ist Stand der Technik und bedarf keiner weiteren Erläuterung.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. There, a so-called acoustic friction 8, for example a web or a foam, is provided, which serves to tune the microphone. All of this is state of the art and needs no further explanation.

Erfindungswesentlich ist, dass der Membranring 2 und/oder der ringförmige Isolator 7 aus keramischem Material bestehen. Sie werden mittels Schrauben 4, gegebenenfalls aus elektrisch isolierendem Material, insbesondere ebenfalls keramischem Material, miteinander verbunden und spannen so die Membrane 1 ein.Essential to the invention is that 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.

Die Fig. 2 zeigt die Situation im Falle eines Mikrofons mit zwei Membranen. Prinzipiell besteht ein solches Mikrofon aus zwei Mikrofonen mit jeweils einer Membran 1, die Elektrode - zu - Elektrode gewandt miteinander verbunden sind. Die Elektroden befinden sich dabei in knappem Abstand voneinander. Dieser Abstand bestimmt sich durch die Rolle der akustischen Reibung, die dabei der so gebildete scheibenförmige Hohlraum oder Schlitz 8' zwischen den einander zugewandten Stirnflächen der beiden Elektroden 5 übernimmt.The Fig. 2 shows the situation in the case of a microphone with two membranes. In principle, such 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.

Im dargestellten Ausführungsbeispiel sind die beiden Mikrofonteile auf nicht gezeigte Weise (zB durch das Gehäuse bzw. die Kapsel und/oder die weiteren Bauteile) miteinander passend verbunden bzw. werden in dieser Lage gehalten, gegebenenfalls mit einem nicht gezeigten Zwischenring. Es ist selbstverständlich möglich, die beiden Bauteile mittels zumindest eines Abstandhalters und Durchgangsschrauben statt/zusätzlich zu den Schrauben 4 zu verbinden, um ihre Handhabung und Montage zu erleichtern. Auch ist es möglich, beide Elektroden mit einem ringförmigen Isolator zu halten oder die dargestellte Konfiguration in der Kapsel nach dem, gegebenenfalls sukzessiven, Einbringen durch Festklemmen sicherzustellen. In Kenntnis der Erfindung ist es dem Fachmann ein leichtes, hier für die einzelnen Anwendungsgebiete die passenden Ausführungsformen zu wählen.In the illustrated embodiment, 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.

Die Fig. 3 zeigt eine Draufsicht in Richtung des Pfeiles III der Fig. 2, der keramische Membranring 2, die Schrauben 4 und die Membrane 1 sind gut zu erkennen.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.

Die Fig. 4 zeigt, rein schematisch, eine Variante der Fig. 1 mit einem Haltering 9 aus keramischem Material und einer isolierenden Scheibe 7, die einerseits gemeinsam mit dem Haltering 9 die Elektrode und die Membrane 1 samt ihren Ringen hält, andererseits eine akustische Reibung 8, dargestellt als durchlässiges Material, fixiert.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.

Analog zeigen die Figs. 5 und 6 eine Doppelausführung ähnlich der der Figs. 2 und 3, wiederum mit einem keramischen Haltering 9. Hier ist aber statt der Schlitzreibung 8' eine als Gespinst oder ähnliches ausgebildete akustische Reibung 8 vorgesehen, das kann frei kombiniert bzw. ausgetauscht werden.Analog show the Figs. 5 and 6 a double version similar to the Figs. 2 and 3 Here again but instead of the slot friction 8 'designed as a web or similar acoustic friction 8 is provided, which can be freely combined or replaced.

Allgemein soll noch darauf hingewiesen werden, dass der Isolator 7 nur allgemein ringförmig sein muss, in dem Sinn, dass er die Elektrode 5 an deren Umfang umgibt und hält und in dem Sinn, dass er mit dem Membranring 2 zusammenwirkt, um die Membrane 1 zu halten. Sonst kann er an die jeweilige Einbausituation angepasst sein und entsprechende Vorsprünge, Schultern, Nasen, Einkerbungen, etc. aufweisen.In general, it should be pointed out that 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.

Die Erfindung kann verschiedentlich abgewandelt werden. So können auch die Schrauben 4 aus keramischem Material bestehen, sie können mit Senkköpfen ausgebildet sein, die gänzlich in Ausnehmungen im jeweiligen Ring eintauchen, und dergleichen mehr.The invention can be modified variously. Thus, 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.

In der Beschreibung und den Ansprüchen werden die Begriffe "vorne", "hinten", "oben", "unten" und so weiter in der landläufigen Form und unter Bezugnahme auf den Gegenstand in seiner üblichen Gebrauchslage, gebraucht. Das heißt, dass bei einer Waffe die Mündung des Laufes "vorne" ist, dass der Verschluss bzw. Schlitten durch die Explosionsgase nach "hinten" bewegt wird, etc..In the description and claims, the terms "front", "rear", "top", "bottom" and so on are used in the common form and with reference to the article in its usual position of use. This means that for a weapon, the mouth of the barrel is "forward", that the shutter or carriage is moved by the explosion gases to the "back", etc ..

Es soll noch darauf hingewiesen werden, dass in der Beschreibung und den Ansprüchen Angaben wie "unterer Bereich" eines Gehänges, Reaktors, Filters, Bauwerks, oder einer Vorrichtung oder, ganz allgemein, eines Gegenstandes, die untere Hälfte und insbesondere das untere Viertel der Gesamthöhe bedeutet, "unterster Bereich" das unterste Viertel und insbesondere einen noch kleineren Teil; während "mittlerer Bereich" das mittlere Drittel der Gesamthöhe (Breite - Länge) meint. All diese Angaben haben ihre landläufige Bedeutung, angewandt auf die bestimmungsgemäße Position des betrachteten Gegenstandes.It should also be noted that in the description and claims, such as "lower range" of a hanger, reactor, filter, building, or a device or, more generally, an object, the lower half and in particular the lower quarter of the total height "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.

In der Beschreibung und den Ansprüchen bedeutet "im Wesentlichen" eine Abweichung von bis zu 10 % des angegebenen Wertes, wenn es physikalisch möglich ist, sowohl nach unten als auch nach oben, ansonsten nur in die sinnvolle Richtung, bei Gradangaben (Winkel und Temperatur) sind damit ± 10° gemeint.In the description and claims, "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.

Alle Mengenangaben und Anteilsangaben, insbesondere solche zur Abgrenzung der Erfindung, soweit sie nicht die konkreten Beispiele betreffen, sind mit ± 10 % Toleranz zu verstehen, somit beispielsweise: 11% bedeutet: von 9,9% bis 12,1%. Bei Bezeichnungen wie bei: "ein Lösungsmittel" ist das Wort "ein" nicht als Zahlwort, sondern als Fürwort anzusehen, wenn nicht aus dem Zusammenhang etwas anderes hervorgeht.All quantities and proportions, in particular those for delimiting the invention, as far as they do not relate to the specific examples are to be understood with ± 10% tolerance, thus, for example: 11% means: from 9.9% to 12.1%. For terms such as "a solvent", the word "a" is not to be regarded as a numerical word but as a proverb, unless the context indicates otherwise.

Der Begriff: "Kombination" bzw. "Kombinationen" steht, soferne nichts anderes angegeben, für alle Arten von Kombinationen, ausgehend von zwei der betreffenden Bestandteile bis zu einer Vielzahl derartiger Bestandteile, der Begriff: "enthaltend" steht auch für "bestehend aus".The term "combination" or "combinations", unless stated otherwise, stands for all types of combinations, starting from two of the relevant constituents up to a multiplicity of such constituents, the term "containing" also standing for "consisting of" ,

Die in den einzelnen Ausgestaltungen und Beispielen angegebenen Merkmale und Varianten können mit denen der anderen Beispiele und Ausgestaltungen frei kombiniert und insbesondere zur Kennzeichnung der Erfindung in den Ansprüchen ohne zwangläufige Mitnahme der anderen Details der jeweiligen Ausgestaltung bzw. des jeweiligen Beispiels verwendet werden Bezugszeichenliste: 01 Membrane 06 Löcher 02 Membranring 07 Isolator 03 Distanzring 08 Akustische Reibung 04 Schraube(n) 08' a. Reibung als Schlitz 05 Elektrode 09 Haltering The features and variants specified in the individual embodiments and examples can be freely combined with those of the other examples and embodiments and in particular be used to characterize the invention in the claims without zwangläufige entrainment of the other details of the respective embodiment or the respective example LIST OF REFERENCE NUMBERS 01 membrane 06 holes 02 diaphragm ring 07 insulator 03 spacer 08 Acoustic friction 04 Screw (s) 08 ' a. Friction as a slot 05 electrode 09 retaining ring

Claims (6)

Kondensatormikrofon mit zumindest einer Membrane (1), zumindest einer der Membrane (1) zugeordneten Elektrode (5), zumindest einem ringförmigen Isolator (7), der die Elektrode (5) hält, mit zumindest einem die Membrane haltenden Membranring (2) und gegebenenfalls einem die genannten Bauteile haltenden Haltering (9), dadurch gekennzeichnet, dass der Membranring (2) und/oder der ringförmige Isolator (7) und/oder der Haltering (9) aus keramischem Material besteht/bestehen.Condenser microphone with at least one membrane (1), at least one of the membrane (1) associated electrode (5), at least one annular insulator (7) holding the electrode (5), with at least one diaphragm ring holding the membrane (2) and optionally a holding ring (9) holding said components, characterized in that the membrane ring (2) and / or the annular insulator (7) and / or the retaining ring (9) consists / consist of ceramic material. Kondensatormikrofon nach Anspruch 1, dadurch gekennzeichnet, dass der Membranring (2) mit dem ringförmigen Isolator (7) mittels Schrauben (4) verschraubt wird, und dass die Schrauben (4) aus keramischem Material bestehen.Condenser microphone according to claim 1, characterized in that the membrane ring (2) with the annular insulator (7) by means of screws (4) is screwed, and that the screws (4) consist of ceramic material. Kondensatormikrofon nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass es zwei Elektroden (5) aufweist, die einander mit ihren Stirnflächen gegenüberstehen, und dass die ihnen zugeordneten ringförmigen Isolatoren (7) miteinander mittels zumindest eines Abstandhalters und mit Durchgangsschrauben statt und/oder zusätzlich zu den Schrauben (4) verbunden sind.Condenser microphone according to one of claims 1 or 2, characterized in that it comprises two electrodes (5) which face each other with their end faces, and that their associated annular insulators (7) by means of at least one spacer and with through screws instead of and / or in addition to the screws (4) are connected. Kondensatormikrofon nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass es zwei Elektroden (5) aufweist, die einander mit ihren Stirnflächen gegenüberstehen, und dass beide Elektroden (5) von einem gemeinsamen ringförmigen Isolator (7) gehalten werden.A condenser microphone according to any one of claims 1 to 3, characterized in that it comprises two electrodes (5) facing each other with their end faces, and that both electrodes (5) are held by a common annular insulator (7). Kondensatormikrofon nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass es zwei Elektroden (5) aufweist, die einander mit ihren Stirnflächen gegenüberstehen, und dass beide Elektroden (5) von einem gemeinsamen keramischen Haltering (9) gehalten werden.A condenser microphone according to any one of claims 1 to 3, characterized in that it comprises two electrodes (5) facing each other with their end faces, and that both electrodes (5) are held by a common ceramic retaining ring (9). Kondensatormikrofon nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, dass das keramische Material Zirconiumoxid ist.A condenser microphone according to any one of the preceding claims, characterized in that the ceramic material is zirconium oxide.
EP18163360.3A 2018-03-22 2018-03-22 Condenser microphone with ring made of ceramic Active EP3544317B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18163360.3A EP3544317B1 (en) 2018-03-22 2018-03-22 Condenser microphone with ring made of ceramic
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 EP3544317B1 (en) 2018-03-22 2018-03-22 Condenser microphone with ring made of ceramic

Publications (2)

Publication Number Publication Date
EP3544317A1 true EP3544317A1 (en) 2019-09-25
EP3544317B1 EP3544317B1 (en) 2024-10-30

Family

ID=61800327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18163360.3A Active EP3544317B1 (en) 2018-03-22 2018-03-22 Condenser microphone with ring made of ceramic

Country Status (2)

Country Link
US (1) US10602280B2 (en)
EP (1) EP3544317B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111343523B (en) * 2020-02-28 2021-11-30 广州市天历德电子科技有限公司 Dismounting device for sound box mesh enclosure

Citations (2)

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

Family Cites Families (5)

* 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
JP3574774B2 (en) * 2000-03-22 2004-10-06 ホシデン株式会社 Electret condenser microphone
JP4751057B2 (en) * 2004-12-15 2011-08-17 シチズン電子株式会社 Condenser microphone and manufacturing method thereof
JP2007043327A (en) * 2005-08-01 2007-02-15 Star Micronics Co Ltd Condenser microphone
JP4944760B2 (en) * 2007-12-27 2012-06-06 ホシデン株式会社 Electret condenser microphone

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151799A (en) * 1982-03-05 1983-09-09 Matsushita Electric Ind Co Ltd Electrostatic microphone
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
EP3544317B1 (en) 2024-10-30

Similar Documents

Publication Publication Date Title
DE2900427B1 (en) Dynamic transducer with a voice coil in an air gap filled with a magnetic fluid
DE6916586U (en) ELECTRIC AND METHOD OF ITS MANUFACTURING
EP3544317A1 (en) Condenser microphone with ring made of ceramic
DE4138406C2 (en) Gland packing with active sealing rings and with a spring device made of passive gland rings
DE1639444B2 (en) ELECTROACOUSTIC CONVERTER
DE102010007982A1 (en) Device for compressing a fuel cell assembly by means of variable spring elements
DE19622461B4 (en) Gas-filled surge arrester with external short-circuit device
DE670870C (en) Electrically insulating storage device for the motor blower unit of vacuum cleaners
DE1247401B (en) Electret microphone and its assembly method
DE4241212A1 (en) Drive system for moving coil loudspeakers - has moving coil supplied by central contact discs with coil springs loading carrier coupled to coil
DE1129183B (en) Electroacoustic converter based on the electrostatic principle
Komlos et al. US-Kapitol-Erstürmung: Aufstand der unteren Mittelschicht
DE2404724A1 (en) ECHO HAND MICROPHONE
DE2119907A1 (en) Handset for telephones
DE867405C (en) Condenser microphone with a spring-mounted capsule
DE102016206176A1 (en) Surge arresters
Holte Gottessymbol und soziale Struktur
DE565792C (en) Microphone with carbon core for underwater sound receivers
DE734483C (en) Vibrating crystal holder
DE1075726B (en) Spark gap for surge arresters
DE462308C (en) Rotary capacitor with solid dielectric, the plate pack of which is held together by spring pressure
DE1097578B (en) Pressure ionization chamber
DE1798363C (en) Electric battery clock
DE2346173C3 (en) Surge arrester with metallic pipe socket
DE548296C (en) Winding capacitor in a cup-shaped insulating housing

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200319

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210226

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20240523

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR