FR499748A - Method and apparatus for telephonically transmitting speech - Google Patents

Method and apparatus for telephonically transmitting speech

Info

Publication number
FR499748A
FR499748A FR499748A FR499748DA FR499748A FR 499748 A FR499748 A FR 499748A FR 499748 A FR499748 A FR 499748A FR 499748D A FR499748D A FR 499748DA FR 499748 A FR499748 A FR 499748A
Authority
FR
France
Prior art keywords
transmitting speech
telephonically
telephonically transmitting
speech
transmitting
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
FR499748A
Other languages
French (fr)
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.)
Philips North America LLC
Original Assignee
Magnavox Co
Filing date
Publication date
Application filed by Magnavox Co filed Critical Magnavox Co
Application granted granted Critical
Publication of FR499748A publication Critical patent/FR499748A/en
Expired legal-status Critical Current

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
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/38—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
FR499748A 1918-07-05 Method and apparatus for telephonically transmitting speech Expired FR499748A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB133365T

Publications (1)

Publication Number Publication Date
FR499748A true FR499748A (en) 1920-02-20

Family

ID=10021074

Family Applications (1)

Application Number Title Priority Date Filing Date
FR499748A Expired FR499748A (en) 1918-07-05 Method and apparatus for telephonically transmitting speech

Country Status (3)

Country Link
FR (1) FR499748A (en)
GB (1) GB133365A (en)
NL (1) NL5854C (en)

Also Published As

Publication number Publication date
GB133365A (en)
NL5854C (en)

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