NL270840A - - Google Patents

Info

Publication number
NL270840A
NL270840A NL270840DA NL270840A NL 270840 A NL270840 A NL 270840A NL 270840D A NL270840D A NL 270840DA NL 270840 A NL270840 A NL 270840A
Authority
NL
Netherlands
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 NL270840A publication Critical patent/NL270840A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • 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 

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)
NL270840D 1960-02-12 NL270840A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB515660A GB942658A (en) 1960-02-12 1960-02-12 Improvements in or relating to electro-acoustic transducers

Publications (1)

Publication Number Publication Date
NL270840A true NL270840A (enrdf_load_stackoverflow)

Family

ID=9790738

Family Applications (1)

Application Number Title Priority Date Filing Date
NL270840D NL270840A (enrdf_load_stackoverflow) 1960-02-12

Country Status (4)

Country Link
DE (1) DE1160009B (enrdf_load_stackoverflow)
GB (2) GB942658A (enrdf_load_stackoverflow)
NL (1) NL270840A (enrdf_load_stackoverflow)
SE (1) SE310709B (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270115B (de) * 1964-01-08 1968-06-12 Standard Elektrik Lorenz Ag Elektrodynamischer Wandler der Fernmeldetechnik, insbesondere dynamische Hoerkapsel
DE3007808A1 (de) * 1980-02-29 1981-09-10 Siemens AG, 1000 Berlin und 8000 München Elektroakustischer wandler

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2684724A (en) * 1948-10-01 1954-07-27 Bell Telephone Labor Inc Sound wave refractor
DE941674C (de) * 1950-12-28 1956-03-22 Siemens ß. Halske Aktiengesellschaft, Berlin und München Lautsprecherkombination, bei der auf er Vorderseite und/oder auf der Rückseite der Membran ein akustisches Filter, vorzugsweise Tiefpaßfilter, für die Begrenzung des abgestrahlten Frequenzbereiches vorgesehen ist
DE1025452B (de) * 1952-09-18 1958-03-06 Standard Elektrik Ag Elektroakustischer Wandler mit Helmholzreseonator
DE1762064U (de) * 1957-12-20 1958-02-27 Lab Wennebostel Dr Ing Sennhei Mikrofon mit elektrodynamischem wandle.

Also Published As

Publication number Publication date
SE310709B (enrdf_load_stackoverflow) 1969-05-12
DE1160009B (de) 1963-12-27
GB942658A (en) 1963-11-27
GB970986A (enrdf_load_stackoverflow)

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