FR683883A - Improvements to diaphragms for phonographs and similar hearing devices - Google Patents

Improvements to diaphragms for phonographs and similar hearing devices

Info

Publication number
FR683883A
FR683883A FR683883DA FR683883A FR 683883 A FR683883 A FR 683883A FR 683883D A FR683883D A FR 683883DA FR 683883 A FR683883 A FR 683883A
Authority
FR
France
Prior art keywords
phonographs
diaphragms
hearing devices
similar hearing
similar
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
Thomas Hugh Parker
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 FR683883A publication Critical patent/FR683883A/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
    • H04R1/38—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 in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR683883D 1929-10-24 1929-10-24 Improvements to diaphragms for phonographs and similar hearing devices Expired FR683883A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR683883T 1929-10-24

Publications (1)

Publication Number Publication Date
FR683883A true FR683883A (en) 1930-06-18

Family

ID=9024151

Family Applications (1)

Application Number Title Priority Date Filing Date
FR683883D Expired FR683883A (en) 1929-10-24 1929-10-24 Improvements to diaphragms for phonographs and similar hearing devices

Country Status (1)

Country Link
FR (1) FR683883A (en)

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