BE421555A - - Google Patents

Info

Publication number
BE421555A
BE421555A BE421555DA BE421555A BE 421555 A BE421555 A BE 421555A BE 421555D A BE421555D A BE 421555DA BE 421555 A BE421555 A BE 421555A
Authority
BE
Belgium
Prior art keywords
diaphragm
telephone receiver
receiver
space
horn
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE421555A publication Critical patent/BE421555A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
BE421555D BE421555A (enExample)

Publications (1)

Publication Number Publication Date
BE421555A true BE421555A (enExample)

Family

ID=83395

Family Applications (1)

Application Number Title Priority Date Filing Date
BE421555D BE421555A (enExample)

Country Status (1)

Country Link
BE (1) BE421555A (enExample)

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