BE324881A - - Google Patents

Info

Publication number
BE324881A
BE324881A BE324881DA BE324881A BE 324881 A BE324881 A BE 324881A BE 324881D A BE324881D A BE 324881DA BE 324881 A BE324881 A BE 324881A
Authority
BE
Belgium
Application number
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
Publication of BE324881A publication Critical patent/BE324881A/xx

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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Toys (AREA)
BE324881D 1924-03-27 1946-09-14 BE324881A (id)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US702452A US1631646A (en) 1924-03-27 1924-03-27 Sound-reproducing apparatus

Publications (1)

Publication Number Publication Date
BE324881A true BE324881A (id) 1949-09-30

Family

ID=24821277

Family Applications (3)

Application Number Title Priority Date Filing Date
BE417960D BE417960A (id) 1924-03-27 1936-10-17
BE421801D BE421801A (id) 1924-03-27 1937-05-28
BE324881D BE324881A (id) 1924-03-27 1946-09-14

Family Applications Before (2)

Application Number Title Priority Date Filing Date
BE417960D BE417960A (id) 1924-03-27 1936-10-17
BE421801D BE421801A (id) 1924-03-27 1937-05-28

Country Status (4)

Country Link
US (1) US1631646A (id)
BE (3) BE417960A (id)
FR (3) FR595818A (id)
GB (3) GB231420A (id)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445276A (en) * 1945-05-04 1948-07-13 Massa Frank Electrodynamic loudspeaker
GB774121A (en) * 1954-03-18 1957-05-08 Ferranti Ltd Improvements relating to gramophone pick-ups
US6704425B1 (en) * 1999-11-19 2004-03-09 Virtual Bass Technologies, Llc System and method to enhance reproduction of sub-bass frequencies
FR2955445B1 (fr) 2010-01-15 2013-06-07 Phl Audio Transducteur electrodynamique a dome et suspension interne
FR2955444B1 (fr) 2010-01-15 2012-08-03 Phl Audio Systeme de haut-parleur coaxial a chambre de compression
FR2955446B1 (fr) 2010-01-15 2015-06-05 Phl Audio Transducteur electrodynamique a dome et suspension flottante

Also Published As

Publication number Publication date
FR47708E (fr) 1937-06-22
FR30476E (fr) 1926-07-17
GB464418A (en) 1937-04-19
BE417960A (id) 1936-11-30
GB231421A (en) 1925-09-17
GB231420A (en) 1925-08-20
FR595818A (fr) 1925-10-09
US1631646A (en) 1927-06-07
BE421801A (id) 1937-06-30

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