DE943411C - Moving coil microphone - Google Patents

Moving coil microphone

Info

Publication number
DE943411C
DE943411C DEB12652D DEB0012652D DE943411C DE 943411 C DE943411 C DE 943411C DE B12652 D DEB12652 D DE B12652D DE B0012652 D DEB0012652 D DE B0012652D DE 943411 C DE943411 C DE 943411C
Authority
DE
Germany
Prior art keywords
microphone
moving coil
coil microphone
air chamber
magnet system
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.)
Expired
Application number
DEB12652D
Other languages
German (de)
Inventor
Eugen Beyer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEB12652D priority Critical patent/DE943411C/en
Application granted granted Critical
Publication of DE943411C publication Critical patent/DE943411C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/222Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for microphones

Description

Im allgemeinen wird bei einem Tauchspulen-Mikrofon Geradlinigkeit der resultierenden. Fre;-quenzkurve angestrebt, und zwar unabhängig von der Einfallsrichtung des Schalls. Durch die gleometrischen Größen der verwendetem Bauelemente ist es jedoch nicht möglich, einTauchspulen-Mikro, fon so klein zu bauen, -daß es bei ausreichender Empfindlichkeit unabhängig von der Einfallsrichtung des Schalls wird. Aus diesem Grunde nimmt man meistens die Nachteile der Abhängigkeit der Frequenzcharakteristik vom. der Einfällsrichtung in Kauf. Dieser Nachteil besteht darin, daß die höheren Frequenzen bei. schräger Einsprechrichtung, bezogen auf die Achse des. Mikrofons, benachteiligt werden. Ein gewisser Ausgleich kann dadurch erreicht werden, daß die Frequenzkurve bei Beschallung von vorn, nach den höheren Frequenzen zu einen. Anstieg aufweist, so daß im diffusem. Schallfeld enne gewisse Geradlinigkeit des. Frequenzganges erzielt wird.In general, a moving coil microphone becomes straightforward the resulting. Fre; frequency curve sought, regardless of the direction of incidence of sound. Due to the gleometric sizes of the components used, it is However, it is not possible to build a diving coil microphone so small that it is sufficiently Sensitivity becomes independent of the direction of incidence of the sound. For this Basically, one usually takes the disadvantages of the dependence of the frequency characteristic from the. the direction of incidence in purchase. This disadvantage is that the higher Frequencies at. inclined speaking direction, based on the axis of the microphone, be disadvantaged. Some compensation can be achieved in that the Frequency curve when sounding from the front, towards the higher frequencies. rise has so that in the diffuse. Sound field enne certain straightness of the frequency response is achieved.

Bei diesem Bestreben kommt die natürliche obere Resonanz konstruktiv zur Hilfe. Es ist meistens bei solchen dynamischem Tänchspülen-Mikro,fonen eine Resonanzspitze beii 6 bis io ooo Hz vorhanden, die sich relativ schwer beeinflussen läßt. Eine Nachteil ist, daß diese Resonanzspitze relativ schmal ist und. somit stören könnte.In this endeavor, the natural upper resonance comes constructively to help. It is mostly with such dynamic sink micro, fonen one Resonance peaks at 6 to 10,000 Hz, which are relatively difficult to influence leaves. A disadvantage is that this resonance peak is relatively narrow and. Consequently could disturb.

Es ist bereits bekannt, ein zweites Luftkissen, zu verwenden, welches den Frequenzgang des Mikrofons in denn Bereich 2ooo bis 3000 Hz beeinflußt. Dieses Luftkissen kann, in den Kern, des Magnetsystems eingebaut werden. Nachteilig ist bei der bekannten Lösung, daß das Luftkissen vor dem Einbauen; in das Mikrofon nach Größe und Dämpfung genauestens eingestellt werden muß.It is already known to use a second air cushion, which influences the frequency response of the microphone in the range from 2000 to 3000 Hz. This air cushion can be built into the core of the magnet system. The disadvantage of the known solution is that the air cushion prior to installation; must be precisely set in the microphone according to size and attenuation.

Erfindungsgemäß werden diese Na@Wenle dadurch, behoben, daß zum Abflachen der natürlichem. oberen Resonanz bzw. zur Verbreiterung des oberen Frequenzbiaad:es des Mikrofons eine zusätzliche-, mit Löchern versehene Luftkammer im Luftweg gleich unterhalb, des Luftspaltes des Magnetsystiems vorgesehen ist. Fig. i zeigt die konstruktive Ausführung des Mikrofons.According to the invention, these Na @ Wenle are eliminated by flattening them the natural. upper resonance or to broaden the upper frequency bias: es The microphone has an additional, perforated air chamber in the airway below, the air gap of the magnet system is provided. Fig. I shows the constructive Execution of the microphone.

i ist die schwingende Membran, die auf der Polplatte] 2 konzentrisch befestigt ist. 3 ist der Magnet, 4 der Magnetkern, 5 die zusätzliche Luftkammer, die durch den. Ring 6. gebildet wird. 7 ist der zur Dämpfurig verwendete Stoff.i is the vibrating membrane that is concentric on the pole plate] 2 is attached. 3 is the magnet, 4 is the magnet core, 5 is the additional air chamber, through the. Ring 6. is formed. 7 is the substance used for steaming.

Der mit Löchern versehene Ring 6 hat gleichzeitig die Aufgabe, die Größe der verwendeten Luftkammer und die Zentrierung des Kerns 4 zur Polplatte 2 zu bewerkstelligten. Die Größe der Dämpfung wird durch dem. Stoff 7 bestimmt. Die Einstellung kann, durch Auswechseln des Stoffes leicht vorgenommen werden, da sich der Kern 4 aus d'em bereits fertigen. Magnetsystem herausnehmen läßt. Die Verbesserung der Ftequenzkurve zeigt Fig.2. 8 ist die Frequenzkurve eines normalem; Mikrofons, 9 die eines mit einer zusätzlichen Luftkammer versehenen Mikrofons.The perforated ring 6 also has the task of Size of the air chamber used and the centering of the core 4 in relation to the pole plate 2 to be accomplished. The amount of attenuation is determined by the. Substance 7 determined. the Adjustment can easily be made by changing the fabric as it is already manufacture the core 4 from d'em. Magnet system can be removed. The improvement the frequency curve is shown in Fig.2. 8 is the frequency curve of a normal one; Microphones, 9 that of a microphone with an additional air chamber.

Claims (2)

PATENTANSPRÜCHE: i. Dynamisches Tauchspulen-Mikrofon, dadurch gekennzeichnet, daß zum Abflachen der natürlichen oberen Resonanz bz.w. zur Verbreiterung des oberen Frequenzbandes des Mikro, fons eine zusätzliche, mit Löchern versehene Luftkammer im Luftweg gleich unterhalb des Luftspaltes des Magnetsystems vorgesehen ist. PATENT CLAIMS: i. Dynamic moving coil microphone, characterized in that that to flatten the natural upper resonance resp. to widen the upper Frequency band of the microphone an additional air chamber provided with holes is provided in the airway just below the air gap of the magnet system. 2. Dynamisches Tauchspulen-Mikrofon nach Anspruch i; dadurch gekennzeichnet, daß die Luftkammer durch einen, ringförmigen Körper gebildet wird, der gleichzeitig den Kern des Magnetsystems gegenüber der Polplatte zentriert. Angezogene Druckschriften: Britische Patentschrift Nr. 511 034; USA.-Patentschrift Nr-. f 766473; »Handbuch der Funktechnik«, 6-. Band., 1938, S. 34; Siemens: »Veröffentlichungen aus. dem Gebiete der Nachrichtentechnik«, i9.38, i. Folge., S. 1i3.2. Dynamic moving coil microphone according to claim i; characterized in that the air chamber is formed by an annular body which at the same time centers the core of the magnet system with respect to the pole plate. Cited references: British Patent No. 511 034; U.S. Patent No. f 766473; »Handbook of radio technology«, 6-. Vol., 1938, p. 34; Siemens: »Publications off. the field of communications technology «, 19.38, i. Episode., P. 1i3.
DEB12652D 1940-06-27 1940-06-27 Moving coil microphone Expired DE943411C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB12652D DE943411C (en) 1940-06-27 1940-06-27 Moving coil microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB12652D DE943411C (en) 1940-06-27 1940-06-27 Moving coil microphone

Publications (1)

Publication Number Publication Date
DE943411C true DE943411C (en) 1956-05-17

Family

ID=6957214

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB12652D Expired DE943411C (en) 1940-06-27 1940-06-27 Moving coil microphone

Country Status (1)

Country Link
DE (1) DE943411C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226645B (en) * 1962-10-01 1966-10-13 Electro Voice Dynamic microphone
DE1276105B (en) * 1956-03-29 1968-08-29 Claesson Harry Elias Electromagnetic headphones
FR2164605A1 (en) * 1971-12-22 1973-08-03 Ibm

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1766473A (en) * 1928-05-05 1930-06-24 Bell Telephone Labor Inc Electrodynamic device
GB511034A (en) * 1937-12-31 1939-07-31 Henry John Houlgate Improvements in and relating to electric acoustic devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1766473A (en) * 1928-05-05 1930-06-24 Bell Telephone Labor Inc Electrodynamic device
GB511034A (en) * 1937-12-31 1939-07-31 Henry John Houlgate Improvements in and relating to electric acoustic devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1276105B (en) * 1956-03-29 1968-08-29 Claesson Harry Elias Electromagnetic headphones
DE1226645B (en) * 1962-10-01 1966-10-13 Electro Voice Dynamic microphone
FR2164605A1 (en) * 1971-12-22 1973-08-03 Ibm

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