FR644982A - Improvements to sound reproduction systems - Google Patents

Improvements to sound reproduction systems

Info

Publication number
FR644982A
FR644982A FR644982DA FR644982A FR 644982 A FR644982 A FR 644982A FR 644982D A FR644982D A FR 644982DA FR 644982 A FR644982 A FR 644982A
Authority
FR
France
Prior art keywords
sound reproduction
reproduction systems
systems
sound
reproduction
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)
Inventor
Emil Fredrick Holinger
Edward Chase Crowley
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 filed Critical
Application granted granted Critical
Publication of FR644982A publication Critical patent/FR644982A/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
    • H04R11/02—Loudspeakers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Percussion Or Vibration Massage (AREA)
FR644982D 1927-04-23 1927-12-01 Improvements to sound reproduction systems Expired FR644982A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US644982XA 1927-04-23 1927-04-23

Publications (1)

Publication Number Publication Date
FR644982A true FR644982A (en) 1928-10-17

Family

ID=22056397

Family Applications (1)

Application Number Title Priority Date Filing Date
FR644982D Expired FR644982A (en) 1927-04-23 1927-12-01 Improvements to sound reproduction systems

Country Status (3)

Country Link
US (1) US1690726A (en)
DE (1) DE511026C (en)
FR (1) FR644982A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2946981C2 (en) * 1979-11-21 1981-05-14 Bm-Elektronik Meletzky Kg, 1000 Berlin Electroacoustic converter
JPH0728478B2 (en) * 1984-12-28 1995-03-29 幅 秀幸 Speaker
US20060196723A1 (en) * 2005-03-03 2006-09-07 White Fred I Balloon speaker asembly
US8240426B2 (en) * 2010-08-19 2012-08-14 Bose Corporation Three dimensional acoustic passive radiating

Also Published As

Publication number Publication date
DE511026C (en) 1930-10-25
US1690726A (en) 1928-11-06

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