BE467069A - - Google Patents

Info

Publication number
BE467069A
BE467069A BE467069DA BE467069A BE 467069 A BE467069 A BE 467069A BE 467069D A BE467069D A BE 467069DA BE 467069 A BE467069 A BE 467069A
Authority
BE
Belgium
Prior art keywords
variations
reinforcements
ovoid
millimeters
twenty
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE467069A publication Critical patent/BE467069A/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 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00

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)
BE467069D BE467069A (2)

Publications (1)

Publication Number Publication Date
BE467069A true BE467069A (2)

Family

ID=118190

Family Applications (1)

Application Number Title Priority Date Filing Date
BE467069D BE467069A (2)

Country Status (1)

Country Link
BE (1) BE467069A (2)

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