FR703234A - Improvements to electro-acoustic transformation systems such as loudspeakers - Google Patents

Improvements to electro-acoustic transformation systems such as loudspeakers

Info

Publication number
FR703234A
FR703234A FR703234DA FR703234A FR 703234 A FR703234 A FR 703234A FR 703234D A FR703234D A FR 703234DA FR 703234 A FR703234 A FR 703234A
Authority
FR
France
Prior art keywords
loudspeakers
electro
transformation systems
acoustic transformation
acoustic
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 Research Products Inc
Original Assignee
Electrical Research Products Inc
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.)
Publication date
Application granted granted Critical
Publication of FR703234A publication Critical patent/FR703234A/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
FR703234D 1929-09-28 Improvements to electro-acoustic transformation systems such as loudspeakers Expired FR703234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US395802A US1907723A (en) 1929-09-28 1929-09-28 Sound reproducing device

Publications (1)

Publication Number Publication Date
FR703234A true FR703234A (en) 1931-04-25

Family

ID=23564579

Family Applications (1)

Application Number Title Priority Date Filing Date
FR703234D Expired FR703234A (en) 1929-09-28 Improvements to electro-acoustic transformation systems such as loudspeakers

Country Status (3)

Country Link
US (1) US1907723A (en)
FR (1) FR703234A (en)
GB (1) GB361976A (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440439A (en) * 1942-07-04 1948-04-27 Permoflux Corp Permanent magnet electrodynamic transducer
US2426948A (en) * 1945-01-02 1947-09-02 Rca Corp Coaxial dual-unit electrodynamic loud-speaker
US2544765A (en) * 1948-08-23 1951-03-13 Edison Inc Thomas A Acoustic coupling device
US2638510A (en) * 1949-01-06 1953-05-12 Caesar David Zeitouni Duplex loud-speaker
BE519367A (en) * 1951-12-07
DE1142448B (en) * 1956-05-03 1963-01-17 Sennheiser Electronic Sound transmitter with shotgun
US3059720A (en) * 1959-07-27 1962-10-23 Ling Temco Vought Inc High frequency loudspeakers
US3243525A (en) * 1962-11-13 1966-03-29 Eaton Arthur Hearing intensifying and directing apparatus
US3866710A (en) * 1972-11-01 1975-02-18 Mario Cesati Horn loudspeakers
US4021614A (en) * 1974-12-30 1977-05-03 Teledyne, Inc. Woofer equalizer
DE2547759C3 (en) * 1975-10-24 1985-08-08 Endress U. Hauser Gmbh U. Co, 7867 Maulburg Sonic echo sounder for level measurement
USRE32183E (en) * 1976-09-23 1986-06-17 Turbosound Group Ltd. Sound projection system
US4237340A (en) * 1977-06-02 1980-12-02 Klipsch And Associates, Inc. Crossover network for optimizing efficiency and improving response of loudspeaker system
US4315102A (en) * 1979-03-21 1982-02-09 Eberbach Steven J Speaker cross-over networks
US4310065A (en) * 1979-05-11 1982-01-12 Chromalloy Electronics Corporation Radial horn
US4481663A (en) * 1980-10-10 1984-11-06 Altec Corporation Network for use with piezoceramic transducer
US4882562A (en) * 1986-03-11 1989-11-21 Turbosound Limited Adaptor for coupling plural compression drivers to a common horn
US5327505A (en) * 1992-01-24 1994-07-05 Man Ho Kim Multiple output transformers network for sound reproducing system
WO1994019915A1 (en) * 1993-02-25 1994-09-01 Heinz Ralph D Multiple-driver single horn loudspeaker
US6411718B1 (en) 1999-04-28 2002-06-25 Sound Physics Labs, Inc. Sound reproduction employing unity summation aperture loudspeakers
US7392880B2 (en) * 2002-04-02 2008-07-01 Gibson Guitar Corp. Dual range horn with acoustic crossover
US7708112B2 (en) * 2005-11-10 2010-05-04 Earl Russell Geddes Waveguide phase plug
FR2955445B1 (en) 2010-01-15 2013-06-07 Phl Audio ELECTRODYNAMIC TRANSDUCER WITH DOME AND INTERNAL SUSPENSION
FR2955444B1 (en) 2010-01-15 2012-08-03 Phl Audio COAXIAL SPEAKER SYSTEM WITH COMPRESSION CHAMBER
FR2955446B1 (en) 2010-01-15 2015-06-05 Phl Audio ELECTRODYNAMIC TRANSDUCER WITH DOME AND FLOATING SUSPENSION

Also Published As

Publication number Publication date
US1907723A (en) 1933-05-09
GB361976A (en) 1931-11-30

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