FR54541E - Improvements to electrical sound reproducing devices such as radio receivers and phonographs - Google Patents

Improvements to electrical sound reproducing devices such as radio receivers and phonographs

Info

Publication number
FR54541E
FR54541E FR54541DA FR54541E FR 54541 E FR54541 E FR 54541E FR 54541D A FR54541D A FR 54541DA FR 54541 E FR54541 E FR 54541E
Authority
FR
France
Prior art keywords
phonographs
sound reproducing
radio receivers
reproducing devices
electrical 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
Jean-Adolphe Dereux
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 FR54541E publication Critical patent/FR54541E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K11/00—Combinations of a radio or television receiver with apparatus having a different main function
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR54541D 1946-05-09 1946-05-09 Improvements to electrical sound reproducing devices such as radio receivers and phonographs Expired FR54541E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR54541T 1946-05-09

Publications (1)

Publication Number Publication Date
FR54541E true FR54541E (en) 1950-05-04

Family

ID=8688988

Family Applications (1)

Application Number Title Priority Date Filing Date
FR54541D Expired FR54541E (en) 1946-05-09 1946-05-09 Improvements to electrical sound reproducing devices such as radio receivers and phonographs

Country Status (1)

Country Link
FR (1) FR54541E (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2878887A (en) * 1955-11-29 1959-03-24 Wisconsin Alumni Res Found Acoustical device
US2979149A (en) * 1953-10-02 1961-04-11 Carlsson Stig Loudspeaker apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979149A (en) * 1953-10-02 1961-04-11 Carlsson Stig Loudspeaker apparatus
US2878887A (en) * 1955-11-29 1959-03-24 Wisconsin Alumni Res Found Acoustical device

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