GB1122413A - An electro-acoustic transducer - Google Patents

An electro-acoustic transducer

Info

Publication number
GB1122413A
GB1122413A GB42044/65A GB4204465A GB1122413A GB 1122413 A GB1122413 A GB 1122413A GB 42044/65 A GB42044/65 A GB 42044/65A GB 4204465 A GB4204465 A GB 4204465A GB 1122413 A GB1122413 A GB 1122413A
Authority
GB
United Kingdom
Prior art keywords
air
phase
mass
compliance
diaphragm
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
GB42044/65A
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 Akustische und Kino Geraete 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 Akustische und Kino Geraete GmbH filed Critical AKG Akustische und Kino Geraete GmbH
Publication of GB1122413A publication Critical patent/GB1122413A/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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

1,122,413. Transducers. AKUSTISCHE U. KINO-GERATE G.m.b.H. 4 Oct., 1965 [16 Oct., 1964], No. 42044/65. Heading H4J. A unidirectional transducer comprises a phase-shifting system which consists of a resistance and a compliance and has a phaseshifting effect in a low frequency range and a phase-shifting system which consists of a mass and a compliance and has a phase-shifting effect in a higher frequency range. A condenser microphone (Fig. 4) comprises a diaphragm 1 of gold-coated polyester sheet. An air chamber C 1 and acoustic resistance R provide the low frequency phase shift effect. The second phase-shifting system is formed by the compliance of an air cushion C 1 between the diaphragm 1 and an electrode 7 and by a mass L formed by an air column in one or more tubes. The tube or tubes may be adjustable. The chamber C 1 is adjustable by means of an annular disc 4. A moving coil microphone (Fig. 5) comprises a diaphragm 1 secured to the head of a magnet system 8. One phase-shifting system is formed by a frictional resistance R and an air chamber C 1 while the other is formed by a mass L of air in one or more tubes and by a compliance C 2 formed by the air chamber between the diaphragm 1 and magnet system. The air gap is sealed from the air chamber C 1 by a gasket. Alternatively the mass L is formed by the mass of the air column in the air gap.
GB42044/65A 1964-10-16 1965-10-04 An electro-acoustic transducer Expired GB1122413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT881964A AT251668B (en) 1964-10-16 1964-10-16 Electroacoustic converter

Publications (1)

Publication Number Publication Date
GB1122413A true GB1122413A (en) 1968-08-07

Family

ID=3608803

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42044/65A Expired GB1122413A (en) 1964-10-16 1965-10-04 An electro-acoustic transducer

Country Status (4)

Country Link
US (1) US3436493A (en)
AT (1) AT251668B (en)
DE (1) DE1462123A1 (en)
GB (1) GB1122413A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410741B (en) * 2002-02-26 2003-07-25 Akg Acoustics Gmbh Pressure gradient MICROPHONE CAPSULE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL102054C (en) * 1954-01-11

Also Published As

Publication number Publication date
AT251668B (en) 1967-01-10
US3436493A (en) 1969-04-01
DE1462123A1 (en) 1969-02-27

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