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GB1067273A - Electroacoustic transducers - Google Patents

Electroacoustic transducers

Info

Publication number
GB1067273A
GB1067273A GB40447/63A GB4044763A GB1067273A GB 1067273 A GB1067273 A GB 1067273A GB 40447/63 A GB40447/63 A GB 40447/63A GB 4044763 A GB4044763 A GB 4044763A GB 1067273 A GB1067273 A GB 1067273A
Authority
GB
United Kingdom
Prior art keywords
magnet
magnetic
frame
yoke
oct
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
GB40447/63A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1067273A publication Critical patent/GB1067273A/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
    • H04R11/06—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1,067,273. Sound reproducing and transmitting devices. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. Oct. 14, 1963 [Oct. 15, 1962 (2); Dec. 18, 1962; March 8, 1963], No. 40447/63. Heading H4J. An earphone, microphone or other electroacoustic transducer has a magnetic path provided by a cylindrical sleeve magnet 4, a magnetic armature 8 and a concentric inner polepiece 2 on which is mounted a coil 3, and the magnet 4 is provided with a magnetic shunt in the form of a surrounding sleeve 6 which diverts some of the flux of the magnet 4 from the armature 8 via an alternative path. A substantially enclosed cavity is formed by a cylindrical frame 1, a diaphragm 7 of magnetic material and a yoke 5. The magnet 4, together with the frame 1, defines a substantially closed annular chamber a 1 which is acoustically coupled, by an aperture 14, with the remaining space within the substantially enclosed cavity. An annular spacer P is provided and a substantially closed disc-like chamber a 3 is formed under the diaphragm 7. The yoke 5 has an aperture 13 which communicates with a further cavity a 2 . The outer casing 9 is covered by an aluminium cap 10. The frame 1 and a cover (10), Fig. 2a (not shown), may be of material to provide a magnetic shield. In manufacture, the magnet 4 is first fully magnetized and subsequently demagnetized gradually until a sensitive transducer having a stable and well-balanced operation is obtained.
GB40447/63A 1962-10-15 1963-10-14 Electroacoustic transducers Expired GB1067273A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP6065762 1962-10-15
JP6065662 1962-10-15
JP7738562 1962-12-18
JP1751263 1963-03-08

Publications (1)

Publication Number Publication Date
GB1067273A true GB1067273A (en) 1967-05-03

Family

ID=27456791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40447/63A Expired GB1067273A (en) 1962-10-15 1963-10-14 Electroacoustic transducers

Country Status (4)

Country Link
US (1) US3324253A (en)
DE (1) DE1218520B (en)
FR (1) FR1380614A (en)
GB (1) GB1067273A (en)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
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US3584161A (en) * 1968-12-06 1971-06-08 Bell Telephone Labor Inc Balanced magnetic transducer
JPS5492316A (en) * 1977-12-29 1979-07-21 Seiko Instr & Electronics Ltd Electromagnetic type electro-acoustic transducer
IT1117418B (en) * 1979-08-01 1986-02-17 Marcon Srl IMPROVEMENT IN SOUND RE-PRODUCTION CAPSULES FOR HEARING AIDS
ATE21477T1 (en) * 1981-12-30 1986-08-15 Plessey Overseas ELECTROACOUSTIC TRANSDUCERS.
DE9106716U1 (en) * 1991-05-31 1991-07-25 Deutsche Airbus GmbH, 2000 Hamburg Headphones for a rescue intercom system
JPH06319190A (en) * 1992-03-31 1994-11-15 Souei Denki Seisakusho:Yugen Constructing method/device for earphone unifying receiver and microphone
US6389145B2 (en) * 1998-07-24 2002-05-14 Agere Systems Guardian Corp. Methods and apparatus for controlling the output of moving armature transducers
KR100343303B1 (en) * 1998-11-04 2002-07-15 모리시타 요이찌 Electromagnetic transducer
USD444141S1 (en) 1999-02-25 2001-06-26 Koss Corporation Stereophone ear plug housing
USD435036S (en) * 1999-11-17 2000-12-12 Koss Corporation Stereophone ear plug
SE516270C2 (en) * 2000-03-09 2001-12-10 Osseofon Ab Electromagnetic vibrator
US6411722B1 (en) 2000-05-11 2002-06-25 Dan Wolf Earphone for an RF transmitting device
US7471801B2 (en) * 2002-05-10 2008-12-30 Osseofon Ab Device for the generation of or monitoring of vibrations
US7570777B1 (en) * 2004-01-13 2009-08-04 Step Labs, Inc. Earset assembly
US7078082B2 (en) * 2004-01-15 2006-07-18 Sonoco Development, Inc. Dual-functioning mechanism for startup during winding of web material and for splicing during unwinding
SE0600843L (en) * 2006-04-12 2007-10-13 Osseofon Ab Method of manufacturing balanced vibrator
USD660292S1 (en) * 2011-08-24 2012-05-22 Nokia Corporation Headset
USD670680S1 (en) * 2011-10-03 2012-11-13 Daryl Eisenmenger Retractable ear plug housing
USD783003S1 (en) 2013-02-07 2017-04-04 Decibullz Llc Moldable earpiece
US9241209B2 (en) 2013-06-25 2016-01-19 Google Inc. Headphones with adaptable fit
USD705421S1 (en) 2013-10-23 2014-05-20 Daryl Eisenmenger Retractable ear plug housing
JP5711860B1 (en) * 2014-12-17 2015-05-07 太陽誘電株式会社 Piezoelectric sounder and electroacoustic transducer
USD781269S1 (en) * 2015-02-06 2017-03-14 Lg Electronics Inc. Wireless headset
USD777710S1 (en) * 2015-07-22 2017-01-31 Doppler Labs, Inc. Ear piece
USD772204S1 (en) * 2015-11-03 2016-11-22 Cleer Gear Llc Wireless earpiece with charging capsule
JP1567613S (en) * 2016-05-05 2017-01-23
USD813848S1 (en) * 2016-06-27 2018-03-27 Dolby Laboratories Licensing Corporation Ear piece
USD812042S1 (en) * 2016-10-12 2018-03-06 Shenzhen Zijieyuanzi Technology Co., ltd. Wireless earset
USD817309S1 (en) * 2016-12-22 2018-05-08 Akg Acoustics Gmbh Pair of headphones
USD851072S1 (en) * 2017-06-22 2019-06-11 Fka Distributing Co., Llc Earphone component
USD833420S1 (en) * 2017-06-27 2018-11-13 Akg Acoustics Gmbh Headphone
USD890696S1 (en) 2017-07-21 2020-07-21 Google Llc Earbud charging case
USD867326S1 (en) 2017-07-21 2019-11-19 Google Llc Wireless earbuds
USD896781S1 (en) 2017-08-04 2020-09-22 Google Llc Audio assembly
USD844586S1 (en) 2017-08-04 2019-04-02 Google Llc Audio assembly
USD870708S1 (en) 2017-12-28 2019-12-24 Harman International Industries, Incorporated Headphone
USD858489S1 (en) * 2018-01-04 2019-09-03 Mpow Technology Co., Limited Earphone
USD879075S1 (en) 2018-07-11 2020-03-24 Google Llc Earbud stand assembly
USD871376S1 (en) * 2019-03-02 2019-12-31 Shenzhen Gu Ning Culture Co., Ltd. Wireless earphone

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968712C (en) * 1951-10-17 1958-03-20 Gasaccumulator Svenska Ab Touch microphone
US2794862A (en) * 1952-07-03 1957-06-04 American Danish Oticon Corp Electro-acoustic apparatus
DE1719002U (en) * 1955-12-06 1956-03-22 Max Grundig MAGNETIC LITTLE HOER.
NL259225A (en) * 1960-06-08
US3092693A (en) * 1960-12-12 1963-06-04 Nippon Telegraph & Telephone Electromagnetic receiver

Also Published As

Publication number Publication date
FR1380614A (en) 1964-12-04
DE1218520B (en) 1966-06-08
US3324253A (en) 1967-06-06

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