FR585593A - Improvements to furniture for wireless wave receiving devices - Google Patents

Improvements to furniture for wireless wave receiving devices

Info

Publication number
FR585593A
FR585593A FR585593DA FR585593A FR 585593 A FR585593 A FR 585593A FR 585593D A FR585593D A FR 585593DA FR 585593 A FR585593 A FR 585593A
Authority
FR
France
Prior art keywords
furniture
receiving devices
wave receiving
wireless wave
wireless
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
Edward Alfred Graham
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 FR585593A publication Critical patent/FR585593A/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)
FR585593D 1923-03-20 1924-08-13 Improvements to furniture for wireless wave receiving devices Expired FR585593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB585593X 1923-03-20

Publications (1)

Publication Number Publication Date
FR585593A true FR585593A (en) 1925-03-03

Family

ID=10481903

Family Applications (1)

Application Number Title Priority Date Filing Date
FR585593D Expired FR585593A (en) 1923-03-20 1924-08-13 Improvements to furniture for wireless wave receiving devices

Country Status (1)

Country Link
FR (1) FR585593A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754291C (en) * 1934-06-09 1952-10-20 Electrical Res Prod Inc Microphones and loudspeakers with directional characteristics
DE2800471A1 (en) * 1977-03-17 1978-09-21 American Trading & Prod FUNNEL SPEAKER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754291C (en) * 1934-06-09 1952-10-20 Electrical Res Prod Inc Microphones and loudspeakers with directional characteristics
DE2800471A1 (en) * 1977-03-17 1978-09-21 American Trading & Prod FUNNEL SPEAKER

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