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DE2852176A1 - Microphone inset for telephone handset - has grooves on inside of casing to flatten frequency response - Google Patents

Microphone inset for telephone handset - has grooves on inside of casing to flatten frequency response

Info

Publication number
DE2852176A1
DE2852176A1 DE19782852176 DE2852176A DE2852176A1 DE 2852176 A1 DE2852176 A1 DE 2852176A1 DE 19782852176 DE19782852176 DE 19782852176 DE 2852176 A DE2852176 A DE 2852176A DE 2852176 A1 DE2852176 A1 DE 2852176A1
Authority
DE
Germany
Prior art keywords
casing
grooves
outside
frequency response
smooth
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
DE19782852176
Other languages
German (de)
Other versions
DE2852176C2 (en
Inventor
Herbert Hofmann
Franz Rumianek
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.)
Telenorma Telefonbau und Normalzeit GmbH
Original Assignee
Telefonbau und Normalzeit 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 Telefonbau und Normalzeit GmbH filed Critical Telefonbau und Normalzeit GmbH
Priority to DE19782852176 priority Critical patent/DE2852176C2/en
Publication of DE2852176A1 publication Critical patent/DE2852176A1/en
Application granted granted Critical
Publication of DE2852176C2 publication Critical patent/DE2852176C2/en
Expired legal-status Critical Current

Links

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 

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

The electroacoustic transducer has its frequency response flattened out by an appropriate design of the coupling between the inside of the casing (1) and the outside (6) of the part (3) holding the component. This coupling is such that either the inside or outside has axial grooves (rifling) and the other side is smooth. The grooves are pref. on the inside of the casing whilst the outside (6) of the part is smooth. The advantage lies in simplicity. Use is made of components that are already present.

Description

Anordnung zur Einebnung der Frequenzkurve bei einemArrangement for leveling the frequency curve in a

elektroakustischen Wandler Die Erfindung betrifft eine Anordnung zur Einebnung der Frequenzkurve bei einem elektroakustische Wandler für Fernsprechapparate. Hierzu wird bei den gebräuchlichen Wandlern der Luftraum hinter der Membran über einen Luftreibungswiderstand mit einem zweiten Luftraum gekoppelt. Dieser Luftreibungswiderstand wird bei bekannten Ausführungen durch Gaze-oder ähnliche Scheiben oder durch schmale Luftkanäle in besonderen, für diesen Zweck vorgesehenen Bauteilen erreicht. Diese Ausbildungen sind umständlich und aufwendig.electroacoustic transducer The invention relates to an arrangement for Flattening of the frequency curve in an electroacoustic transducer for telephone sets. For this purpose, the air space behind the membrane is overlaid with conventional converters an air friction resistance coupled to a second air space. This drag is in known designs by gauze or similar panes or by narrow ones Air channels achieved in special, intended for this purpose components. These Training is cumbersome and time-consuming.

Gegenstand der Erfindung ist es,die Einebnung der Frequenzkurve in einfacher Weise zu erreichen und mit Bauteilen, die bei elektroakustischen Wandlern sowieso vorhanden sind.The object of the invention is to flatten the frequency curve in easier way to achieve and with components common to electroacoustic transducers exist anyway.

Bei einer Anordnung zur Einebnung der Frequenzkurve bei einem elektroakustischen Wandler für Fernsprechapparate, bei dem der Luftraum hinter der Membran über einen Luftreibungswiderstand mit einem zweiten Luftraum im Kapselinnern gekoppelt ist,wird dies erfindungsgemäß dadurch erreicht, daß Kopplungskanäle in der Weise zwischen der Innenseite des Gehäuses und der Außenseite des die Bauteile aufnehmenden Aufbaukörpers gebildet werden,- daß eine Seite mit axial angebrachten, umlaufenden Vertiefungen, insbesondere nach Art einer Riffelung und die andere Seite glatt ausgebildet ist. Gemäß einer vorteilhaften Ausgestaltung der Erfindung sind auf der Innenseite des Gehäuses die Vertiefungen angebracht und die Außenseite des Aufbaukörpers ist glatt ausgebildet.In an arrangement for leveling the frequency curve in an electroacoustic Converters for telephone sets, where the airspace behind the Membrane through an air friction resistance with a second air space inside the capsule is coupled, this is achieved according to the invention in that coupling channels in the way between the inside of the housing and the outside of the components receiving body, - that one side with axially attached, circumferential depressions, in particular in the manner of a corrugation and the other side is smooth. According to an advantageous embodiment of the invention are on the inside of the housing the indentations and the outside of the The body is smooth.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird anschließend näher beschrieben.An embodiment of the invention is shown in the drawing and is described in more detail below.

Es zeigen: Fig.1 einen elektroakustischen Wandler in der Seitenansicht im Schnitt Fig.2 die Kopplungskanäle ausschnittsweise in vergrößertem Maßstab in der Draufsicht.They show: FIG. 1 an electroacoustic transducer in a side view in section FIG. 2 the coupling channels in detail on an enlarged scale in the top view.

Der in den Fig.1 und 2 dargestellte elektroakustische Wandler ist ein dynamischer Wandler für einen Fernsprechapparat. Er besitzt ein Gehäuse 1 mit einem Deckel 2. In das Gehäuse 1 ist ein Aufbaukörper 3 eingesetzt, welcher die Membran 4 und die anderen Bauteile des Wandlers aufnimmt.The electroacoustic transducer shown in Figures 1 and 2 is a dynamic converter for a telephone set. He has a housing 1 with a cover 2. In the housing 1, a body 3 is inserted, which the Receives membrane 4 and the other components of the transducer.

An der Innenseite 10 des Gehäuses 1 sind umlaufend Vertiefungen 5 nach Art einer Riffelung angebracht.On the inside 10 of the housing 1 there are recesses 5 all around attached in the manner of a corrugation.

Die Außenseite 6 des Tragekörpers 3 ist glatt ausgebildet. Bei dieser Ausbildung werden in eingesetztem Zustand des Tragekörpers 3 in das Gehäuse 1 durch die Vertiefungen 5 Kopplungskanäle gebildet.The outside 6 of the support body 3 is smooth. At this Training are in the inserted state of the support body 3 in the housing 1 through the wells formed 5 coupling channels.

Die Luft aus dem Raum 7 hinter der Membran 4 kann über Langlöcher 8 in dem Aufbaukörper 3 durch die als BuStreibungswider stand wirkenden Vertiefungen 5 in den Raum 9 des Gehäuses 1 gelangen und inentgegengesetzter Richtung zurück, so daß hierdurch eine Einebnung der Frequenzkurve des Wandlers erfolgt. Dieser Effekt wird bei dieser Ausbildung in einfacher Weise ohne zusätzliche Bauteile erzielt.The air from the space 7 behind the membrane 4 can be through elongated holes 8 in the body 3 by the stand acting as BuStreibungswider depressions 5 enter the space 9 of the housing 1 and return in the opposite direction, so that this results in a leveling of the frequency curve of the converter. This effect is achieved in this training in a simple manner without additional components.

Claims (2)

Anordnung zur Einebnung der Frequenzkurve bei einem elektroakustischen Wandler Patentansprüche $ Anordnung zur Einebnung der Frequenzkurve bei einem elektroakustischen Wandler für Fernsprechapparate, bei dem der Luftraum hinter der Membran über einen BuStreibungswiderstand mit einem zweiten Luftraum im Kapseiinnern gekoppelt ist, dadurch gekennzeichnet, daß Kopplungskanäle in der Weise zwischen der Innenseite (10) des Gehäuses (1) und der Außenseite (6) des die Bauteile aufnehmenden Aufbaukörpers (3) gebildet werden, daß eine Seite (10 bzw. 6) mit axial angebrachten, umlaufenden Vertiefungen (5), insbesondere nach Art einer Riffelung und die andere Seite(10 bzw. 6) glatt ausgebildet ist.Arrangement for leveling the frequency curve in an electroacoustic Converter claims $ arrangement for leveling the frequency curve in an electroacoustic Converter for telephone sets in which the air space behind the membrane has a The friction resistance is coupled with a second air space inside the capsule, characterized in that coupling channels in the manner between the inside (10) of the housing (1) and the outside (6) of the structural body accommodating the components (3) be formed that one side (10 or 6) with axially attached, circumferential Depressions (5), in particular in the manner of a corrugation and the other side (10 or 6) is smooth. 2.Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß auf der Innenseite (10) des Gehäuses (1) die Vertiefungen (5) angebracht sind und die Außenseite (6) des Aufbaukörpers (3) glatt ausgebildet ist.2. Arrangement according to claim 1, characterized in that on the inside (10) of the housing (1) the recesses (5) are attached and the outside (6) of the body (3) is smooth.
DE19782852176 1978-12-02 1978-12-02 Arrangement for leveling the frequency curve in an electroacoustic transducer Expired DE2852176C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782852176 DE2852176C2 (en) 1978-12-02 1978-12-02 Arrangement for leveling the frequency curve in an electroacoustic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782852176 DE2852176C2 (en) 1978-12-02 1978-12-02 Arrangement for leveling the frequency curve in an electroacoustic transducer

Publications (2)

Publication Number Publication Date
DE2852176A1 true DE2852176A1 (en) 1980-06-19
DE2852176C2 DE2852176C2 (en) 1985-06-05

Family

ID=6056134

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782852176 Expired DE2852176C2 (en) 1978-12-02 1978-12-02 Arrangement for leveling the frequency curve in an electroacoustic transducer

Country Status (1)

Country Link
DE (1) DE2852176C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545302A1 (en) * 1983-04-26 1984-11-02 Thomson Csf Mat Tel Acoustic filter for transducer in particular of the telephone handset electromagnetic type
DE3510346A1 (en) * 1985-03-22 1986-10-02 Fernsprech- und Signalbau KG Schüler & Vershoven, 4300 Essen Dynamic acoustic transducer
EP0751696A1 (en) * 1995-06-28 1997-01-02 Alcatel Dial Face S.P.A. Equalization system of a telephone piezoceramic transducer

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1934164A1 (en) * 1968-08-22 1970-02-26 Wilhelm Roedinger Fa Closed sludge digester - for sewage sludge or the like
DE2204033A1 (en) * 1972-01-28 1973-08-02 Lehner Fernsprech Signal ELECTRODYNAMIC CONVERTER, IN PARTICULAR HOER CAPSULE FOR TELEPHONE PURPOSES
DD108437A1 (en) * 1973-12-28 1974-09-12
DE2509196A1 (en) * 1975-03-03 1976-09-09 Erich Enderle Industrievertret Electro acoustic transducer with air space behind membrane - has space subdivided by sound attenuating material to maintain LF efficiency
DE1961246B2 (en) * 1969-12-05 1977-04-07 Siemens AG, 1000 Berlin und 8000 München Microphone with acoustic attenuation cavity - has underside of diaphragm coupled via orifice and gap to housing cavity
AT337793B (en) * 1975-10-02 1977-07-25 Akg Akustische Kino Geraete ACOUSTIC FRICTION RESISTANCE AND DEVICE FOR ITS PRODUCTION
DE2322475C2 (en) * 1972-02-09 1981-10-08 Fernsprech- Und Signalbau Lehner & Co Kg, 4300 Essen Electroacoustic transducer, in particular for speech and earphone capsules for telephone sets
DE2936965C2 (en) * 1979-09-13 1982-04-01 Standard Elektrik Lorenz Ag, 7000 Stuttgart Permanent dynamic electroacoustic transducer capsule
DE2503828C3 (en) * 1975-01-30 1983-04-21 Friedrich Reiner Telefonfabrik Permanent dynamic electroacoustic transducer capsule

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1934164A1 (en) * 1968-08-22 1970-02-26 Wilhelm Roedinger Fa Closed sludge digester - for sewage sludge or the like
DE1961246B2 (en) * 1969-12-05 1977-04-07 Siemens AG, 1000 Berlin und 8000 München Microphone with acoustic attenuation cavity - has underside of diaphragm coupled via orifice and gap to housing cavity
DE2204033A1 (en) * 1972-01-28 1973-08-02 Lehner Fernsprech Signal ELECTRODYNAMIC CONVERTER, IN PARTICULAR HOER CAPSULE FOR TELEPHONE PURPOSES
DE2322475C2 (en) * 1972-02-09 1981-10-08 Fernsprech- Und Signalbau Lehner & Co Kg, 4300 Essen Electroacoustic transducer, in particular for speech and earphone capsules for telephone sets
DD108437A1 (en) * 1973-12-28 1974-09-12
DE2503828C3 (en) * 1975-01-30 1983-04-21 Friedrich Reiner Telefonfabrik Permanent dynamic electroacoustic transducer capsule
DE2509196A1 (en) * 1975-03-03 1976-09-09 Erich Enderle Industrievertret Electro acoustic transducer with air space behind membrane - has space subdivided by sound attenuating material to maintain LF efficiency
AT337793B (en) * 1975-10-02 1977-07-25 Akg Akustische Kino Geraete ACOUSTIC FRICTION RESISTANCE AND DEVICE FOR ITS PRODUCTION
DE2936965C2 (en) * 1979-09-13 1982-04-01 Standard Elektrik Lorenz Ag, 7000 Stuttgart Permanent dynamic electroacoustic transducer capsule

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
E. Skudrzyk, Die Grundlagen der Akustik, Springer-Verlag 1954, S. 346 *
Harry F. Olson, Axoustical Engineering, D. Von Nostrand Company, 1957, S.88, 89 und 90 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545302A1 (en) * 1983-04-26 1984-11-02 Thomson Csf Mat Tel Acoustic filter for transducer in particular of the telephone handset electromagnetic type
DE3510346A1 (en) * 1985-03-22 1986-10-02 Fernsprech- und Signalbau KG Schüler & Vershoven, 4300 Essen Dynamic acoustic transducer
EP0751696A1 (en) * 1995-06-28 1997-01-02 Alcatel Dial Face S.P.A. Equalization system of a telephone piezoceramic transducer

Also Published As

Publication number Publication date
DE2852176C2 (en) 1985-06-05

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8363 Opposition against the patent
8327 Change in the person/name/address of the patent owner

Owner name: TELENORMA TELEFONBAU UND NORMALZEIT GMBH, 6000 FRA

8331 Complete revocation