FR715222A - Improvements to acoustic diaphragms - Google Patents

Improvements to acoustic diaphragms

Info

Publication number
FR715222A
FR715222A FR715222DA FR715222A FR 715222 A FR715222 A FR 715222A FR 715222D A FR715222D A FR 715222DA FR 715222 A FR715222 A FR 715222A
Authority
FR
France
Prior art keywords
acoustic diaphragms
diaphragms
acoustic
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
Other languages
French (fr)
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.)
Parlophone Records Ltd
Original Assignee
Gramophone 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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Application granted granted Critical
Publication of FR715222A publication Critical patent/FR715222A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR715222D 1930-06-06 1931-04-14 Improvements to acoustic diaphragms Expired FR715222A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB715222X 1930-06-06

Publications (1)

Publication Number Publication Date
FR715222A true FR715222A (en) 1931-11-27

Family

ID=10494587

Family Applications (1)

Application Number Title Priority Date Filing Date
FR715222D Expired FR715222A (en) 1930-06-06 1931-04-14 Improvements to acoustic diaphragms

Country Status (1)

Country Link
FR (1) FR715222A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756614C (en) * 1937-12-19 1952-10-13 Helmut Dr Sell Carbon microphone in which the resistance material is housed in a container freely supported by the membrane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756614C (en) * 1937-12-19 1952-10-13 Helmut Dr Sell Carbon microphone in which the resistance material is housed in a container freely supported by the membrane

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