BE422587A - - Google Patents

Info

Publication number
BE422587A
BE422587A BE422587DA BE422587A BE 422587 A BE422587 A BE 422587A BE 422587D A BE422587D A BE 422587DA BE 422587 A BE422587 A BE 422587A
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 BE422587A publication Critical patent/BE422587A/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
    • H04R1/22—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)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
BE422587D 1936-08-01 BE422587A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US215787XA 1936-08-01 1936-08-01

Publications (1)

Publication Number Publication Date
BE422587A true BE422587A (enrdf_load_stackoverflow)

Family

ID=21805020

Family Applications (1)

Application Number Title Priority Date Filing Date
BE422587D BE422587A (enrdf_load_stackoverflow) 1936-08-01

Country Status (4)

Country Link
BE (1) BE422587A (enrdf_load_stackoverflow)
CH (1) CH215787A (enrdf_load_stackoverflow)
FR (1) FR824971A (enrdf_load_stackoverflow)
GB (1) GB481351A (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE854670C (de) * 1948-10-02 1952-11-06 Electroacustic Ges M B H Daempfungseinrichtung von Telephonen und Mikrophonen
DE947083C (de) * 1952-10-01 1956-08-09 Standard Elek K Ag Elektromagnetisches Schallgeraet in Kapselform
NL8501650A (nl) * 1985-06-07 1987-01-02 Philips Nv Elektrodynamische omzetter met een tweedelig membraan.
NL8602451A (nl) * 1986-09-29 1988-04-18 Philips Nv Luidspreker met een tweedelig membraan voor toepassing als autoluidspreker.

Also Published As

Publication number Publication date
GB481351A (en) 1938-03-09
CH215787A (de) 1941-07-15
FR824971A (fr) 1938-02-21

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