GB829608A - Improvements in or relating to an electro-acoustic transducer - Google Patents

Improvements in or relating to an electro-acoustic transducer

Info

Publication number
GB829608A
GB829608A GB7473/58A GB747358A GB829608A GB 829608 A GB829608 A GB 829608A GB 7473/58 A GB7473/58 A GB 7473/58A GB 747358 A GB747358 A GB 747358A GB 829608 A GB829608 A GB 829608A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
electro
silk
pieces
relating
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
GB7473/58A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB829608A publication Critical patent/GB829608A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

829,608. Receivers. TELEFONAKTIEBOLAGET L. M. ERICSSON. March 7, 1958 [April 6, 1957], No. 7473/58. Class 40 (4). An electro-acoustic receiver has two diaphragms 9, 10 of magnetic material. The outer diaphragm 10 is perforated and has a higher natural resonance frequency than the main diaphragm 9. The magnetic circuit comprises a permanent magnet 2 and poleshoes 3, 4. The speech coils 5 and 7 are wound on spools with semi-circular end-pieces 6 and 8. Between the end-pieces 6, 8 is a hole covered with silk 68. The holes in the diaphragm 10 may also be covered with silk. The air behind the diaphragm 9 constitutes a damping medium.
GB7473/58A 1957-04-06 1958-03-07 Improvements in or relating to an electro-acoustic transducer Expired GB829608A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE829608X 1957-04-06

Publications (1)

Publication Number Publication Date
GB829608A true GB829608A (en) 1960-03-02

Family

ID=20349453

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7473/58A Expired GB829608A (en) 1957-04-06 1958-03-07 Improvements in or relating to an electro-acoustic transducer

Country Status (2)

Country Link
BE (1) BE565711A (en)
GB (1) GB829608A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176715B (en) * 1960-11-30 1964-08-27 Dr Rudolf Goerike Electroacoustic converter based on the electromagnetic principle
US4504703A (en) * 1981-06-01 1985-03-12 Asulab S.A. Electro-acoustic transducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1176715B (en) * 1960-11-30 1964-08-27 Dr Rudolf Goerike Electroacoustic converter based on the electromagnetic principle
US4504703A (en) * 1981-06-01 1985-03-12 Asulab S.A. Electro-acoustic transducer

Also Published As

Publication number Publication date
BE565711A (en)

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