FR944881A - Sound system and devices for implementing this method - Google Patents

Sound system and devices for implementing this method

Info

Publication number
FR944881A
FR944881A FR944881DA FR944881A FR 944881 A FR944881 A FR 944881A FR 944881D A FR944881D A FR 944881DA FR 944881 A FR944881 A FR 944881A
Authority
FR
France
Prior art keywords
implementing
devices
sound system
sound
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)
Inventor
Robert Morie
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 filed Critical
Application granted granted Critical
Publication of FR944881A publication Critical patent/FR944881A/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
    • H04R1/345—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 for loudspeakers
FR944881D 1947-03-28 1947-03-28 Sound system and devices for implementing this method Expired FR944881A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR944881T 1947-03-28

Publications (1)

Publication Number Publication Date
FR944881A true FR944881A (en) 1949-04-19

Family

ID=9472009

Family Applications (1)

Application Number Title Priority Date Filing Date
FR944881D Expired FR944881A (en) 1947-03-28 1947-03-28 Sound system and devices for implementing this method

Country Status (1)

Country Link
FR (1) FR944881A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007019450A1 (en) * 2007-04-10 2008-10-16 Michael Schwahn Omnidirectional radiating and receiving horn has two volume bodies mounted one above other at distance from each other, where lower volume body has tubular horn neck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007019450A1 (en) * 2007-04-10 2008-10-16 Michael Schwahn Omnidirectional radiating and receiving horn has two volume bodies mounted one above other at distance from each other, where lower volume body has tubular horn neck

Similar Documents

Publication Publication Date Title
FR941556A (en) Method for adjusting turbo-reactors and apparatus for implementing this method
CH319493A (en) Spraying process and device for implementing this process
FR1060101A (en) Sheet-forming and coating process and equipment for implementing this process
CH260521A (en) Molding process and apparatus for carrying out this process.
CH278602A (en) Method of pickling metals and installation for the implementation of this method.
FR1009749A (en) Polishing process and implementation devices
FR1063860A (en) Slag-free casting process and device for its implementation
FR944881A (en) Sound system and devices for implementing this method
FR1028870A (en) Method of transmitting signals and transmitting and receiving devices suitable for the implementation of this method
FR946376A (en) Improved method of telephone transmission and apparatus for implementing this method
FR970649A (en) Stereophonic transmission method and device for implementing this method
FR1004155A (en) Improved welding process and apparatus for carrying out this process
FR940292A (en) Improvements to motion transformation processes, devices for implementing this process and their application
FR1022810A (en) Thermoscopy and luminescence thermography method and devices for carrying out the method
FR59183E (en) Control method and devices for implementing this method
FR1003600A (en) Method of photographic reproduction and apparatus for carrying out this method
FR945382A (en) Reading method for the blind and apparatus for implementing this method
FR926250A (en) Method for treating teeth and device for implementing this method
FR943166A (en) Improved method and devices for receiving radiotelegraph messages manipulated by frequency variation
FR953221A (en) Method of molding bandages and apparatus for carrying out this method
FR1006321A (en) Process for the construction of buildings, and means for its implementation
FR1050502A (en) Anemometric measurement method and compensated servo-anemometer for the implementation of this method
FR1035351A (en) Method for regulating subterranean flows and devices for implementing this method
CH270711A (en) Method for stabilizing a frequency and device for implementing this method.
CH263567A (en) Method for the production of artificial clouds and apparatus for its implementation.