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GB961369A - Improvements in electro-acoustic transducer which is incorporated in a capsule and comprises a transistor amplifier particularly for telephone handsets - Google Patents

Improvements in electro-acoustic transducer which is incorporated in a capsule and comprises a transistor amplifier particularly for telephone handsets

Info

Publication number
GB961369A
GB961369A GB18588/62A GB1858862A GB961369A GB 961369 A GB961369 A GB 961369A GB 18588/62 A GB18588/62 A GB 18588/62A GB 1858862 A GB1858862 A GB 1858862A GB 961369 A GB961369 A GB 961369A
Authority
GB
United Kingdom
Prior art keywords
transducer
diaphragm
transistor amplifier
ducts
capsule
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
GB18588/62A
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 GB961369A publication Critical patent/GB961369A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S181/00—Acoustics
    • Y10S181/40—Wave coupling

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

961,369. Microphones. AKUSTISCHE U. KINO-GERATE G.m.b.H. May 15, 1962 [Feb. 3, 1962], No. 18588/62. Heading H4J. An electrodynamic transducer is mounted in the centre of a circular disc 8, Fig. 3, which serves as a mounting panel or a circuit panel for a transistor amplifier, 9, associated with the transducer. The transducer is provided with coupling volumes 3 on each side of the diaphragm 1 which communicate with the open air by ducts 4 and 6 of such length that sound paths from the entrances 5 and 7 are substantially equal, and of such cross-section that the impedance of the ducts extending from the front of the diaphragm is substantially equal to the impedance of the ducts from the rear of the diaphragm. The arrangement is such that the microphone is sensitive to spherical wave fronts such as result from a speaker whose mouth is close to the transducer, and insensitive to plane wave fronts such as would result from interfering signals from sources at distances from the transducer.
GB18588/62A 1961-02-06 1962-05-15 Improvements in electro-acoustic transducer which is incorporated in a capsule and comprises a transistor amplifier particularly for telephone handsets Expired GB961369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT97061A AT228283B (en) 1961-02-06 1961-02-06 Electroacoustic transducer built into a capsule with a transistor amplifier, particularly for handsets in telephone stations

Publications (1)

Publication Number Publication Date
GB961369A true GB961369A (en) 1964-06-17

Family

ID=3503981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18588/62A Expired GB961369A (en) 1961-02-06 1962-05-15 Improvements in electro-acoustic transducer which is incorporated in a capsule and comprises a transistor amplifier particularly for telephone handsets

Country Status (4)

Country Link
US (1) US3201516A (en)
AT (2) AT228283B (en)
DE (1) DE1186108B (en)
GB (1) GB961369A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6953012B2 (en) 2003-10-20 2005-10-11 Honda Motor Co., Ltd. Forced opening and closing type valve operating system

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4401859A (en) * 1981-05-29 1983-08-30 Electro-Voice, Incorporated Directional microphone with high frequency selective acoustic lens
US4633045A (en) * 1985-02-13 1986-12-30 Crown International, Inc. Differential microphone
US4625828A (en) * 1985-09-09 1986-12-02 The Boeing Company Acoustic reflector for ground plane microphone
US7352558B2 (en) * 2003-07-09 2008-04-01 Maxwell Technologies, Inc. Dry particle based capacitor and methods of making same
US20070122698A1 (en) 2004-04-02 2007-05-31 Maxwell Technologies, Inc. Dry-particle based adhesive and dry film and methods of making same
US20110165318A9 (en) * 2004-04-02 2011-07-07 Maxwell Technologies, Inc. Electrode formation by lamination of particles onto a current collector
US20060147712A1 (en) * 2003-07-09 2006-07-06 Maxwell Technologies, Inc. Dry particle based adhesive electrode and methods of making same
US7791860B2 (en) * 2003-07-09 2010-09-07 Maxwell Technologies, Inc. Particle based electrodes and methods of making same
US7920371B2 (en) * 2003-09-12 2011-04-05 Maxwell Technologies, Inc. Electrical energy storage devices with separator between electrodes and methods for fabricating the devices
US7090946B2 (en) * 2004-02-19 2006-08-15 Maxwell Technologies, Inc. Composite electrode and method for fabricating same
US7440258B2 (en) * 2005-03-14 2008-10-21 Maxwell Technologies, Inc. Thermal interconnects for coupling energy storage devices
DE102013221752A1 (en) * 2013-10-25 2015-04-30 Kaetel Systems Gmbh EARPHONES AND METHOD FOR PRODUCING AN EARPHOR
GB2527784A (en) * 2014-07-01 2016-01-06 Audiogravity Holdings Ltd Wind noise reduction apparatus
US11785375B2 (en) * 2021-06-15 2023-10-10 Quiet, Inc. Precisely controlled microphone acoustic attenuator with protective microphone enclosure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE912821C (en) * 1935-11-13 1954-06-03 Siemens Ag Facility for voice transmission from noisy rooms
US2299620A (en) * 1938-08-19 1942-10-20 Associated Electric Lab Inc Acoustic apparatus
US2228886A (en) * 1938-10-31 1941-01-14 Rca Corp Electroacoustical apparatus
US2463762A (en) * 1941-11-14 1949-03-08 Automatic Elect Lab Electroacoustical transducer
US2870255A (en) * 1954-01-11 1959-01-20 Remler Company Ltd Microphone assembly
DE1014595B (en) * 1955-02-15 1957-08-29 Lab Wennebostel Directional microphone
AT190988B (en) * 1956-02-09 1957-07-25 Henry Radio Heinrich & Co Moving coil microphone
US3048659A (en) * 1959-03-30 1962-08-07 Motorola Inc Microphone preamplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6953012B2 (en) 2003-10-20 2005-10-11 Honda Motor Co., Ltd. Forced opening and closing type valve operating system

Also Published As

Publication number Publication date
DE1186108B (en) 1965-01-28
US3201516A (en) 1965-08-17
AT234171B (en) 1964-06-25
AT228283B (en) 1963-07-10

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