GB942658A - Improvements in or relating to electro-acoustic transducers - Google Patents

Improvements in or relating to electro-acoustic transducers

Info

Publication number
GB942658A
GB942658A GB515660A GB515660A GB942658A GB 942658 A GB942658 A GB 942658A GB 515660 A GB515660 A GB 515660A GB 515660 A GB515660 A GB 515660A GB 942658 A GB942658 A GB 942658A
Authority
GB
United Kingdom
Prior art keywords
electro
relating
louvres
louvre
slit
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB515660A
Other languages
English (en)
Inventor
James Samuel Paterson Roberton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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.)
Filing date
Publication date
Priority to NL270840D priority Critical patent/NL270840A/xx
Priority to GB970986D priority patent/GB970986A/en
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB515660A priority patent/GB942658A/en
Priority to SE128461A priority patent/SE310709B/xx
Priority to FR852049A priority patent/FR1285468A/fr
Priority to DEJ19417A priority patent/DE1160009B/de
Priority to FR877863A priority patent/FR80583E/fr
Publication of GB942658A publication Critical patent/GB942658A/en
Expired legal-status Critical Current

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)
GB515660A 1960-02-12 1960-02-12 Improvements in or relating to electro-acoustic transducers Expired GB942658A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL270840D NL270840A (enrdf_load_stackoverflow) 1960-02-12
GB970986D GB970986A (enrdf_load_stackoverflow) 1960-02-12
GB515660A GB942658A (en) 1960-02-12 1960-02-12 Improvements in or relating to electro-acoustic transducers
SE128461A SE310709B (enrdf_load_stackoverflow) 1960-02-12 1961-02-08
FR852049A FR1285468A (fr) 1960-02-12 1961-02-08 Perfectionnements aux transducteurs électro-acoustiques
DEJ19417A DE1160009B (de) 1960-02-12 1961-02-11 Elektro-akustischer Wandler
FR877863A FR80583E (fr) 1960-02-12 1961-11-03 Perfectionnements aux transducteurs électro-acoustiques

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
GB942658A true GB942658A (en) 1963-11-27

Family

ID=9790738

Family Applications (2)

Application Number Title Priority Date Filing Date
GB970986D Active GB970986A (enrdf_load_stackoverflow) 1960-02-12
GB515660A Expired GB942658A (en) 1960-02-12 1960-02-12 Improvements in or relating to electro-acoustic transducers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB970986D Active GB970986A (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
DE1160009B (de) 1963-12-27
SE310709B (enrdf_load_stackoverflow) 1969-05-12
NL270840A (enrdf_load_stackoverflow)
GB970986A (enrdf_load_stackoverflow)

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