FR657136A - Improvements to sound reproduction systems - Google Patents

Improvements to sound reproduction systems

Info

Publication number
FR657136A
FR657136A FR657136DA FR657136A FR 657136 A FR657136 A FR 657136A FR 657136D A FR657136D A FR 657136DA FR 657136 A FR657136 A FR 657136A
Authority
FR
France
Prior art keywords
sound reproduction
reproduction systems
systems
sound
reproduction
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)
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.)
Electrical Improvements Ltd
Original Assignee
Electrical Improvements 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 Electrical Improvements Ltd filed Critical Electrical Improvements Ltd
Application granted granted Critical
Publication of FR657136A publication Critical patent/FR657136A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR657136D 1927-07-20 1928-07-07 Improvements to sound reproduction systems Expired FR657136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB657136X 1927-07-20

Publications (1)

Publication Number Publication Date
FR657136A true FR657136A (en) 1929-05-17

Family

ID=10490609

Family Applications (1)

Application Number Title Priority Date Filing Date
FR657136D Expired FR657136A (en) 1927-07-20 1928-07-07 Improvements to sound reproduction systems

Country Status (1)

Country Link
FR (1) FR657136A (en)

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