FR985357A - Loud speaker - Google Patents

Loud speaker

Info

Publication number
FR985357A
FR985357A FR985357DA FR985357A FR 985357 A FR985357 A FR 985357A FR 985357D A FR985357D A FR 985357DA FR 985357 A FR985357 A FR 985357A
Authority
FR
France
Prior art keywords
loud speaker
loud
speaker
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.)
ECHANGES OUTRE AILANTIQUE SOC
Original Assignee
ECHANGES OUTRE AILANTIQUE SOC
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 ECHANGES OUTRE AILANTIQUE SOC filed Critical ECHANGES OUTRE AILANTIQUE SOC
Application granted granted Critical
Publication of FR985357A publication Critical patent/FR985357A/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 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
FR985357D 1948-05-01 1949-04-30 Loud speaker Expired FR985357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24663A US2593031A (en) 1948-05-01 1948-05-01 Loud-speaker

Publications (1)

Publication Number Publication Date
FR985357A true FR985357A (en) 1951-07-18

Family

ID=21821753

Family Applications (1)

Application Number Title Priority Date Filing Date
FR985357D Expired FR985357A (en) 1948-05-01 1949-04-30 Loud speaker

Country Status (2)

Country Link
US (1) US2593031A (en)
FR (1) FR985357A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3020751A (en) * 1956-08-29 1962-02-13 Robert J Wohl Wide frequency range electromechanical vibrator
US3073899A (en) * 1957-03-29 1963-01-15 Philo T Farnsworth Transducing apparatus
US2922851A (en) * 1957-05-10 1960-01-26 Gen Dynamics Corp Loudspeakers
US3517226A (en) * 1968-03-25 1970-06-23 Sonics Inc U Ultrasonic piezoelectric transducer with acoustic lens
US4182429A (en) * 1977-12-29 1980-01-08 Kabushiki Kaisha Senzaki Seisakusho Loud-speaker system
DE3378559D1 (en) * 1982-06-01 1988-12-29 Harman Int Ind Multi-driver-loudspeaker
US4554414A (en) * 1983-04-28 1985-11-19 Harman International Industries Incorporated Multi-driver loudspeaker
US5193119A (en) * 1985-09-02 1993-03-09 Franco Tontini Multiple loudspeaker
US4845776A (en) * 1987-05-11 1989-07-04 Electro Acustica S.A. Piezoelectric transducer and transformer circuit
GB8923681D0 (en) * 1989-10-20 1989-12-06 Lyth Charles D Improvements in or relating to loudspeakers
GB0102780D0 (en) * 2001-02-03 2001-03-21 K H Technology Corp Loudspeaker assemblies

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2051200A (en) * 1933-09-14 1936-08-18 Christenson Oscar Sound reproducing device
US2053364A (en) * 1934-08-17 1936-09-08 Rola Company Loudspeaker
US2453521A (en) * 1942-05-30 1948-11-09 Rca Corp Superimposed duplex loud-speaker
US2383832A (en) * 1943-01-29 1945-08-28 Brush Dev Co Intercommunication system
US2402515A (en) * 1943-06-11 1946-06-18 Titanium Alloy Mfg Co High dielectric material and method of making same
US2486560A (en) * 1946-09-20 1949-11-01 Erie Resistor Corp Transducer and method of making the same
US2484950A (en) * 1947-04-09 1949-10-18 Brush Dev Co Bender type electromechanical device with dielectric operating element
US2487962A (en) * 1947-08-29 1949-11-15 Brush Dev Co Electromechanical transducer
US2477596A (en) * 1947-08-29 1949-08-02 Brush Dev Co Electromechanical transducer device

Also Published As

Publication number Publication date
US2593031A (en) 1952-04-15

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