DE975221C - Magnetic microphone - Google Patents

Magnetic microphone

Info

Publication number
DE975221C
DE975221C DESCH17742A DESC017742A DE975221C DE 975221 C DE975221 C DE 975221C DE SCH17742 A DESCH17742 A DE SCH17742A DE SC017742 A DESC017742 A DE SC017742A DE 975221 C DE975221 C DE 975221C
Authority
DE
Germany
Prior art keywords
microphone
frequency
magnetic
way
curve
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
DESCH17742A
Other languages
German (de)
Inventor
Willy Dr-Ing Kuesters
Karl Dr-Ing Schoeps
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 DESCH17742A priority Critical patent/DE975221C/en
Application granted granted Critical
Publication of DE975221C publication Critical patent/DE975221C/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Description

Es ist im Prinzip des magnetischen! MikrophonsIt is in principle of magnetic! Microphones

begründet, daß seine Impedanz mit wachsender Frequenz zunimmt. Dieser Umstand wirkt sich nachteilig für die Anpassung des nachfolgenden Vierpols an das Mikrophon aus.explains that its impedance increases with increasing frequency. This fact affects disadvantageous for the adaptation of the following quadrupole to the microphone.

Gemäß der Erfindung wird diese Schwierigkeit dadurch beseitigt, daß bei einem magnetischen Mikrophon einerseits der Ausgang des Mikrophons durch einRC-Gliea ^Reihenschaltung ίο derart abgeschlossen ist, daß wenigstens im oberen Teil des Übertragungsbereiches die Ausgangsimpedanz desi ■' Mikrophons frequenzunabhängig und in erster Linie durch den Wirkwiderstand des i?C-Gliedes bestimmt ist, und daß andererseits gleichzeitig die Daten des Mikrophons so gewählt sind, daß das Übertragungsmaß in diesem Bereich mit der Frequenz derart zunimmt, daß die durch das i?C-Glied bedingte Frequenzabhängigkeit der Ausgangsspannung kompensiert wird, ao In Abb. 1 ist eine Anordnung gemäß der Erfindung dargestellt. Hierin ist 1 die Spule eines magnetischen Mikrophons, 2 'das RC-Glied1, bestehend aus der Kapazität C und dem dazu in Reihe liegenden ohmschem Widerstand R. *5 In Abb. 2 ist das Übertragungsmaß Ü in Abhängigkeit von der Frequenz f aufgezeigt.According to the invention, this difficulty is eliminated by the fact that in the case of a magnetic microphone, on the one hand, the output of the microphone is terminated by an RC-Gliea ^ series connection in such a way that at least in the upper part of the transmission range the output impedance of the microphone is frequency-independent and primarily through the The effective resistance of the i? C element is determined, and that, on the other hand, the data of the microphone are selected in such a way that the transfer rate in this range increases with the frequency in such a way that the frequency dependence of the output voltage caused by the i? C element is compensated, ao In Fig. 1 an arrangement according to the invention is shown. Here, 1 is the coil of a magnetic microphone, 2 'the RC element 1, consisting of the capacitance C and the thereto in series an ohmic resistance R. * 5 In Fig. 2, the transmission factor Ü is indicated f as a function of frequency.

Abb. 3 zeigt den Absolutwert der Impedanz-Z in Abhängigkeit von der Frequenz f. Fig. 3 shows the absolute value of the impedance-Z as a function of the frequency f.

Ohne das i?C-Glied 2 entspräche der Verlauf der ImpedanzZ in Abhängigkeit von der Frequenz/ der Kurve IV. Durch das ÄC-Glied 2 wird dann" eins Verlauf der Impedanz Z in Abhängigkeit von der Frequenz f entsprechend: der Kurve V bewirkt. Entspräche ohne das i?C-Glied der Verlauf des Übertragunjgsinaßes Ü in Abhängigkeit von der Frequenz / der Kurve I, so würde das i?C-Glied 2 einem Verlauf des Übertragungsmaßes Ü entsprechend der Kurve III bewirken. Um bei Verwendung des 2?C-GHedesi 2 den im allgemeinen- gewünschtenj Verlauf des Übertragungsmaßes· Ü entsprechend der Kurve! zu erhalten, werden die Parameter des Schwingungssystems so gewählt, daß ohne das i?C-Glied 2 der Verlauf des Übertragungsmaßes Ü der Kurve II entspricht. Auf diese Weise wird die eingangs geschilderte Schwierigkeit hinsichtlich der Anpassung beseitigt und gleichzeitig die Ausgangsspanaung im wesentlichen frequenzunabhängig gehalten.? Without the i C-member 2 would correspond to the curve of the impedance Z as a function of the frequency / of the curve IV is by the AEC member 2 then "one curve of the impedance Z as a function of frequency f according to:. Causes the curve V. correspond without the i? C-term of the course of the Übertragunjgsinaßes Ü in dependence on the frequency / of the curve I, so C element would i the? 2 cause a gradient of the transmission factor Ü according to the curve III. in order when using the 2? C -GHedesi 2 to obtain the gewünschtenj in general- the course of the transmission factor · Ü corresponding to the curve?, the parameters of the vibration system are so selected that without the i? C element 2 corresponds to the course of the transmission factor Ü the curve II. in this way, the above-mentioned difficulty with regard to the adaptation is eliminated and at the same time the output voltage is kept essentially independent of frequency.

Eine betrieblich besonders zweckmäßige Form der Anordnung wird dadurch erreicht, daß die Elemente des· i?C-Gliedfcs innerhalb des Mikrophongehäuses angeordnet sind.An operationally particularly expedient form of the arrangement is achieved in that the Elements of the · i? C link within the microphone housing are arranged.

Claims (2)

Patentansprüche:Patent claims: 1. Magnetisches Mikrophon, gekennzeichnet durch die Vereinigung folgender Merkmale:1. Magnetic microphone, labeled by combining the following features: a) Der Ausgang des Mikrophons ist durch ein i?C-Glied in Reihenschaltung- derart abgeschlossen, daß wenigstens im oberen Teil des Übertragungsbereiches die Ausgangsimpedanz des Mikrophons frequenzunabhängig und in erster Linie durch den Wirkwider stand des i?C-Gliedes bestimmt ist.a) The output of the microphone is terminated by an i? C element connected in series in such a way that that at least in the upper part of the transmission range the output impedance of the microphone was independent of frequency and primarily due to the effective resistance of the i? C-limb is intended. b) die Daten des Mikrophons sind so gewählt, daß das Übertragungsmaß in diesem Bereich mit der Frequenz derart zunimmt, daß die durch das i?C-Glied bedingte Frequenzabhängigkeit der Ausgangsspannung kompensiert wird.b) the data of the microphone are chosen so that the transmission level in this area increases with the frequency in such a way that the frequency dependence caused by the i? C element the output voltage is compensated. 2. Magnetisches Mikrophon nach Anspruch 1, dadurch gekennzeichnet, daß die Schaltelemente des i?C-Gliedes im Mikrophongehäuse untergebracht sind.2. Magnetic microphone according to claim 1, characterized in that the switching elements of the i? C element are housed in the microphone housing.
DESCH17742A 1955-04-09 1955-04-10 Magnetic microphone Expired DE975221C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH17742A DE975221C (en) 1955-04-09 1955-04-10 Magnetic microphone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1129803X 1955-04-09
DESCH17742A DE975221C (en) 1955-04-09 1955-04-10 Magnetic microphone

Publications (1)

Publication Number Publication Date
DE975221C true DE975221C (en) 1961-10-05

Family

ID=25992695

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH17742A Expired DE975221C (en) 1955-04-09 1955-04-10 Magnetic microphone

Country Status (1)

Country Link
DE (1) DE975221C (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE436125C (en) * 1922-08-26 1926-10-26 Signal Ges M B H Device for the transmission of alternating currents with the aid of an electromagnetic telephone
DE586456C (en) * 1932-08-20 1933-10-21 Siemens & Halske Akt Ges Electroacoustic apparatus
DE609163C (en) * 1931-03-21 1935-02-16 Telefunken Gmbh Acoustic-mechanical wave filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE436125C (en) * 1922-08-26 1926-10-26 Signal Ges M B H Device for the transmission of alternating currents with the aid of an electromagnetic telephone
DE609163C (en) * 1931-03-21 1935-02-16 Telefunken Gmbh Acoustic-mechanical wave filter
DE586456C (en) * 1932-08-20 1933-10-21 Siemens & Halske Akt Ges Electroacoustic apparatus

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