FR618035A - Improvements to sound reproducing devices - Google Patents

Improvements to sound reproducing devices

Info

Publication number
FR618035A
FR618035A FR618035DA FR618035A FR 618035 A FR618035 A FR 618035A FR 618035D A FR618035D A FR 618035DA FR 618035 A FR618035 A FR 618035A
Authority
FR
France
Prior art keywords
sound reproducing
reproducing devices
devices
sound
reproducing
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
Sidney George Brown
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 FR618035A publication Critical patent/FR618035A/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
    • H04R1/22—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

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
FR618035D 1925-09-18 1926-06-22 Improvements to sound reproducing devices Expired FR618035A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2332925A GB261875A (en) 1925-09-18 1925-09-18 Improvements in and relating to loud-speaking telephones

Publications (1)

Publication Number Publication Date
FR618035A true FR618035A (en) 1927-03-02

Family

ID=10193841

Family Applications (1)

Application Number Title Priority Date Filing Date
FR618035D Expired FR618035A (en) 1925-09-18 1926-06-22 Improvements to sound reproducing devices

Country Status (3)

Country Link
BE (1) BE335004A (en)
FR (1) FR618035A (en)
GB (1) GB261875A (en)

Also Published As

Publication number Publication date
BE335004A (en)
GB261875A (en) 1926-12-02

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