BE424804A - - Google Patents

Info

Publication number
BE424804A
BE424804A BE424804DA BE424804A BE 424804 A BE424804 A BE 424804A BE 424804D A BE424804D A BE 424804DA BE 424804 A BE424804 A BE 424804A
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.)
Publication of BE424804A publication Critical patent/BE424804A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
BE424804D 1936-11-25 BE424804A (en))

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE487576X 1936-11-25

Publications (1)

Publication Number Publication Date
BE424804A true BE424804A (en))

Family

ID=6543652

Family Applications (1)

Application Number Title Priority Date Filing Date
BE424804D BE424804A (en)) 1936-11-25

Country Status (4)

Country Link
US (1) US2174128A (en))
BE (1) BE424804A (en))
FR (1) FR829844A (en))
GB (1) GB487576A (en))

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268030A (en) * 1965-04-13 1966-08-23 Finn H Magnus Acoustic system
US8351630B2 (en) * 2008-05-02 2013-01-08 Bose Corporation Passive directional acoustical radiating

Also Published As

Publication number Publication date
GB487576A (en) 1938-06-22
US2174128A (en) 1939-09-26
FR829844A (fr) 1938-07-07

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