FR2167867B1 - - Google Patents

Info

Publication number
FR2167867B1
FR2167867B1 FR7300679A FR7300679A FR2167867B1 FR 2167867 B1 FR2167867 B1 FR 2167867B1 FR 7300679 A FR7300679 A FR 7300679A FR 7300679 A FR7300679 A FR 7300679A FR 2167867 B1 FR2167867 B1 FR 2167867B1
Authority
FR
France
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
FR7300679A
Other languages
French (fr)
Other versions
FR2167867A1 (ref
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 FR2167867A1 publication Critical patent/FR2167867A1/fr
Application granted granted Critical
Publication of FR2167867B1 publication Critical patent/FR2167867B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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)
FR7300679A 1972-01-10 1973-01-10 Expired FR2167867B1 (ref)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FR2167867A1 FR2167867A1 (ref) 1973-08-24
FR2167867B1 true FR2167867B1 (ref) 1976-05-14

Family

ID=4092018

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7300679A Expired FR2167867B1 (ref) 1972-01-10 1973-01-10

Country Status (4)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1190993C (zh) 1997-04-17 2005-02-23 伯斯有限公司 降低有源噪声的头戴送受话器及其中使用的模块
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
WO2011146429A1 (en) 2010-05-17 2011-11-24 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
CN112122088B (zh) * 2019-06-24 2024-06-25 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 (ref) 1975-06-16
GB1379372A (en) 1975-01-02
FR2167867A1 (ref) 1973-08-24
DE7300802U (de) 1973-03-29

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse