FR646684A - Sound reproduction - Google Patents

Sound reproduction

Info

Publication number
FR646684A
FR646684A FR646684DA FR646684A FR 646684 A FR646684 A FR 646684A FR 646684D A FR646684D A FR 646684DA FR 646684 A FR646684 A FR 646684A
Authority
FR
France
Prior art keywords
sound reproduction
reproduction
sound
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.)
HOPKINS CORP
Original Assignee
HOPKINS CORP
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 HOPKINS CORP filed Critical HOPKINS CORP
Application granted granted Critical
Publication of FR646684A publication Critical patent/FR646684A/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
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
FR646684D 1927-01-07 1928-01-03 Sound reproduction Expired FR646684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US159554A US1763054A (en) 1927-01-07 1927-01-07 Loud-speaker

Publications (1)

Publication Number Publication Date
FR646684A true FR646684A (en) 1928-11-14

Family

ID=22573035

Family Applications (1)

Application Number Title Priority Date Filing Date
FR646684D Expired FR646684A (en) 1927-01-07 1928-01-03 Sound reproduction

Country Status (4)

Country Link
US (1) US1763054A (en)
BE (1) BE347740A (en)
FR (1) FR646684A (en)
GB (1) GB283211A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114429A (en) * 1961-01-16 1963-12-17 Hoffman Electronics Corp Loudspeaker

Also Published As

Publication number Publication date
US1763054A (en) 1930-06-10
GB283211A (en) 1928-06-28
BE347740A (en)

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