FR661129A - Perfectionnement aux dispositifs acoustiques - Google Patents

Perfectionnement aux dispositifs acoustiques

Info

Publication number
FR661129A
FR661129A FR661129DA FR661129A FR 661129 A FR661129 A FR 661129A FR 661129D A FR661129D A FR 661129DA FR 661129 A FR661129 A FR 661129A
Authority
FR
France
Prior art keywords
improvement
acoustic devices
acoustic
devices
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
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parlophone Records Ltd
Original Assignee
Gramophone Co Ltd
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 by Gramophone Co Ltd filed Critical Gramophone Co Ltd
Application granted granted Critical
Publication of FR661129A publication Critical patent/FR661129A/fr
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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • 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 

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
FR661129D 1927-10-04 1928-09-27 Perfectionnement aux dispositifs acoustiques Expired FR661129A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1731460X 1927-10-04

Publications (1)

Publication Number Publication Date
FR661129A true FR661129A (fr) 1929-07-22

Family

ID=10889413

Family Applications (1)

Application Number Title Priority Date Filing Date
FR661129D Expired FR661129A (fr) 1927-10-04 1928-09-27 Perfectionnement aux dispositifs acoustiques

Country Status (3)

Country Link
US (1) US1731460A (fr)
FR (1) FR661129A (fr)
NL (1) NL23563C (fr)

Also Published As

Publication number Publication date
NL23563C (fr)
US1731460A (en) 1929-10-15

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