GB1379372A - Electroacoustic transducer having an inverted diaphragm - Google Patents

Electroacoustic transducer having an inverted diaphragm

Info

Publication number
GB1379372A
GB1379372A GB142273A GB142273A GB1379372A GB 1379372 A GB1379372 A GB 1379372A GB 142273 A GB142273 A GB 142273A GB 142273 A GB142273 A GB 142273A GB 1379372 A GB1379372 A GB 1379372A
Authority
GB
United Kingdom
Prior art keywords
cavity
armature
diaphragm
coupling
damping
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
GB142273A
Other languages
English (en)
Inventor
R C Freeman
A C Busche
K B Simonsen
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.)
Nortel Networks Ltd
Original Assignee
Northern Electric Co Ltd
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 Northern Electric Co Ltd filed Critical Northern Electric Co Ltd
Publication of GB1379372A publication Critical patent/GB1379372A/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
    • H04R11/00—Transducers of moving-armature or moving-core type

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
GB142273A 1972-01-10 1973-01-10 Electroacoustic transducer having an inverted diaphragm Expired GB1379372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA132093 1972-01-10

Publications (1)

Publication Number Publication Date
GB1379372A true GB1379372A (en) 1975-01-02

Family

ID=4092018

Family Applications (1)

Application Number Title Priority Date Filing Date
GB142273A Expired GB1379372A (en) 1972-01-10 1973-01-10 Electroacoustic transducer having an inverted diaphragm

Country Status (4)

Country Link
DE (1) DE7300802U (enExample)
FR (1) FR2167867B1 (enExample)
GB (1) GB1379372A (enExample)
SE (1) SE377025B (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0873040A3 (en) * 1997-04-17 1999-10-06 Bose Corporation Acoustic noise reducing
US8571227B2 (en) 2005-11-11 2013-10-29 Phitek Systems Limited Noise cancellation earphone
US8666085B2 (en) 2007-10-02 2014-03-04 Phitek Systems Limited Component for noise reducing earphone
US8929082B2 (en) 2010-05-17 2015-01-06 Thales Avionics, Inc. Airline passenger seat modular user interface device
US9487295B2 (en) 2010-11-15 2016-11-08 William James Sim Vehicle media distribution system using optical transmitters
US9654854B2 (en) 2011-06-01 2017-05-16 Paul Darlington In-ear device incorporating active noise reduction
US9818394B2 (en) 2009-11-30 2017-11-14 Graeme Colin Fuller Realisation of controller transfer function for active noise cancellation
CN112122088A (zh) * 2019-06-24 2020-12-25 苏州嘉辉超声波科技有限公司 一种双曲面换能器

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0873040A3 (en) * 1997-04-17 1999-10-06 Bose Corporation Acoustic noise reducing
US6831984B2 (en) 1997-04-17 2004-12-14 Bose Corporation Noise reducing
US8571227B2 (en) 2005-11-11 2013-10-29 Phitek Systems Limited Noise cancellation earphone
US8666085B2 (en) 2007-10-02 2014-03-04 Phitek Systems Limited Component for noise reducing earphone
US9818394B2 (en) 2009-11-30 2017-11-14 Graeme Colin Fuller Realisation of controller transfer function for active noise cancellation
US8929082B2 (en) 2010-05-17 2015-01-06 Thales Avionics, Inc. Airline passenger seat modular user interface device
US9487295B2 (en) 2010-11-15 2016-11-08 William James Sim Vehicle media distribution system using optical transmitters
US9654854B2 (en) 2011-06-01 2017-05-16 Paul Darlington In-ear device incorporating active noise reduction
CN112122088A (zh) * 2019-06-24 2020-12-25 苏州嘉辉超声波科技有限公司 一种双曲面换能器

Also Published As

Publication number Publication date
SE377025B (enExample) 1975-06-16
DE7300802U (de) 1973-03-29
FR2167867B1 (enExample) 1976-05-14
FR2167867A1 (enExample) 1973-08-24

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee