BE357449A - - Google Patents

Info

Publication number
BE357449A
BE357449A BE357449DA BE357449A BE 357449 A BE357449 A BE 357449A BE 357449D A BE357449D A BE 357449DA BE 357449 A BE357449 A BE 357449A
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 BE357449A publication Critical patent/BE357449A/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)
BE357449D 1928-01-20 BE357449A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR304313X 1928-01-20

Publications (1)

Publication Number Publication Date
BE357449A true BE357449A (enrdf_load_html_response)

Family

ID=8888782

Family Applications (1)

Application Number Title Priority Date Filing Date
BE357449D BE357449A (enrdf_load_html_response) 1928-01-20

Country Status (3)

Country Link
US (1) US1962300A (enrdf_load_html_response)
BE (1) BE357449A (enrdf_load_html_response)
GB (1) GB304313A (enrdf_load_html_response)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2878887A (en) * 1955-11-29 1959-03-24 Wisconsin Alumni Res Found Acoustical device
GB2239570A (en) * 1989-12-20 1991-07-03 * Wild Michael Bath tub radio
NL1019961C2 (nl) * 2002-02-14 2003-08-15 Duran Audio B V Akoestische weergever.

Also Published As

Publication number Publication date
US1962300A (en) 1934-06-12
GB304313A (en) 1930-06-30

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