SE8301940L - MAGNETODYNAMIC SOUND TRANSMITTER - Google Patents

MAGNETODYNAMIC SOUND TRANSMITTER

Info

Publication number
SE8301940L
SE8301940L SE8301940A SE8301940A SE8301940L SE 8301940 L SE8301940 L SE 8301940L SE 8301940 A SE8301940 A SE 8301940A SE 8301940 A SE8301940 A SE 8301940A SE 8301940 L SE8301940 L SE 8301940L
Authority
SE
Sweden
Prior art keywords
diaphragm
drive device
sound transmitter
magnetodynamic
magneto
Prior art date
Application number
SE8301940A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE452541B (en
SE8301940D0 (en
Inventor
B Holm
Original Assignee
Kockumation Ab
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 Kockumation Ab filed Critical Kockumation Ab
Priority to SE8301940A priority Critical patent/SE452541B/en
Publication of SE8301940D0 publication Critical patent/SE8301940D0/en
Priority to DE3413345A priority patent/DE3413345A1/en
Priority to JP59069277A priority patent/JPS6035899A/en
Priority to KR1019840001860A priority patent/KR840008738A/en
Publication of SE8301940L publication Critical patent/SE8301940L/en
Publication of SE452541B publication Critical patent/SE452541B/en

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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Abstract

In a magneto-dynamic sound transmitter, a diaphragm (11) is actuated by a magneto-dynamic drive device (20, 21, 22) to produce a periodic vibration of the diaphragm. This is achieved with the aid of a magnetic field which is generated by the drive device and which rotates in relation to the diaphragm. The diaphragm forms one wall of a pressure chamber (13) connected to an acoustic horn (17). The pressure chamber is disposed at the periphery of the drive device so that it is periodically contracted and expanded by the magnetic field which radially actuates the wall. <IMAGE>
SE8301940A 1983-04-08 1983-04-08 SOUND TRANSMITTER, INCLUDING ONE OF A MAGNETODYNAMIC DRIVE SYSTEM PAVERABLE MEMBRANE SE452541B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE8301940A SE452541B (en) 1983-04-08 1983-04-08 SOUND TRANSMITTER, INCLUDING ONE OF A MAGNETODYNAMIC DRIVE SYSTEM PAVERABLE MEMBRANE
DE3413345A DE3413345A1 (en) 1983-04-08 1984-04-09 Magneto-dynamic sound transmitter
JP59069277A JPS6035899A (en) 1983-04-08 1984-04-09 Magnetic dynamic acoustic generator
KR1019840001860A KR840008738A (en) 1983-04-08 1984-04-09 Magneto dynamic sound generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8301940A SE452541B (en) 1983-04-08 1983-04-08 SOUND TRANSMITTER, INCLUDING ONE OF A MAGNETODYNAMIC DRIVE SYSTEM PAVERABLE MEMBRANE

Publications (3)

Publication Number Publication Date
SE8301940D0 SE8301940D0 (en) 1983-04-08
SE8301940L true SE8301940L (en) 1984-10-09
SE452541B SE452541B (en) 1987-11-30

Family

ID=20350703

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8301940A SE452541B (en) 1983-04-08 1983-04-08 SOUND TRANSMITTER, INCLUDING ONE OF A MAGNETODYNAMIC DRIVE SYSTEM PAVERABLE MEMBRANE

Country Status (4)

Country Link
JP (1) JPS6035899A (en)
KR (1) KR840008738A (en)
DE (1) DE3413345A1 (en)
SE (1) SE452541B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10158144A1 (en) * 2001-11-27 2003-06-26 Adolf Thies Gmbh & Co Kg Ultrasonic transducer for use under extreme climatic conditions

Also Published As

Publication number Publication date
JPS6035899A (en) 1985-02-23
DE3413345A1 (en) 1984-10-11
SE452541B (en) 1987-11-30
SE8301940D0 (en) 1983-04-08
KR840008738A (en) 1984-12-17

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