FR874440A - Apparatus for directed transmissions or receptions of wave energy - Google Patents

Apparatus for directed transmissions or receptions of wave energy

Info

Publication number
FR874440A
FR874440A FR874440DA FR874440A FR 874440 A FR874440 A FR 874440A FR 874440D A FR874440D A FR 874440DA FR 874440 A FR874440 A FR 874440A
Authority
FR
France
Prior art keywords
receptions
wave energy
directed transmissions
transmissions
directed
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
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.)
Atlas Werke AG
Original Assignee
Atlas Werke AG
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
Application filed by Atlas Werke AG filed Critical Atlas Werke AG
Application granted granted Critical
Publication of FR874440A publication Critical patent/FR874440A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/32—Sound-focusing or directing, e.g. scanning characterised by the shape of the source

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR874440D 1940-02-12 1941-06-03 Apparatus for directed transmissions or receptions of wave energy Expired FR874440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE874440X 1940-02-12

Publications (1)

Publication Number Publication Date
FR874440A true FR874440A (en) 1942-08-06

Family

ID=6816872

Family Applications (1)

Application Number Title Priority Date Filing Date
FR874440D Expired FR874440A (en) 1940-02-12 1941-06-03 Apparatus for directed transmissions or receptions of wave energy

Country Status (1)

Country Link
FR (1) FR874440A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517159A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER COMPRISING A VARIABLE LOADED ELECTRONIC MEMBRANE
FR2517158A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER HAVING SELECTIVELY METALLIC REAR PLATE
FR2517161A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER COMPRISING AN ELECTRET MEMBRANE OF VARIABLE THICKNESS
FR2517160A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER HAVING VARIABLE REAL AIR SPACE
FR2517162A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER HAVING A VARIABLE EFFECTIVE AIR SPACE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517159A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER COMPRISING A VARIABLE LOADED ELECTRONIC MEMBRANE
FR2517158A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER HAVING SELECTIVELY METALLIC REAR PLATE
FR2517161A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER COMPRISING AN ELECTRET MEMBRANE OF VARIABLE THICKNESS
FR2517160A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER HAVING VARIABLE REAL AIR SPACE
FR2517162A1 (en) * 1981-11-20 1983-05-27 Western Electric Co ELECTRET TRANSDUCER HAVING A VARIABLE EFFECTIVE AIR SPACE

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