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GB1083477A - Transducer - Google Patents

Transducer

Info

Publication number
GB1083477A
GB1083477A GB52051/65A GB5205165A GB1083477A GB 1083477 A GB1083477 A GB 1083477A GB 52051/65 A GB52051/65 A GB 52051/65A GB 5205165 A GB5205165 A GB 5205165A GB 1083477 A GB1083477 A GB 1083477A
Authority
GB
United Kingdom
Prior art keywords
tweeter
diaphragm
magnetostrictive element
magnetostrictive
motorola
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
GB52051/65A
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of GB1083477A publication Critical patent/GB1083477A/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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • 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 
    • H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

1,083,477. Transducers. MOTOROLA Inc. Dec. 8, 1965 [Jan. 6, 1965; June 17, 1965], No. 52051/65. Heading H4J. A tweeter comprises an elongated piezoelectric or magnetostrictive element 14 which is cemented at its respective ends to an elliptical spun-aluminium diaphragm 13 and a frame 24, the element being energized so as to produce longitudinal vibrations. The horn 21 and apertured pressure plate 15 are adjustable to provide a proper loading between the element, the diaphragm and the air. The element has a length #/4 at the highest frequency passed by the tweeter. It is preferably a piezo-electric ceramic body of rectangular, tapered, exponential, gaussian, stepped slab or cylindrical form (Figs. 2-5, not shown). Alternatively, a plurality of elements sandwiched between electrodes may be used (Fig. 6, not shown). If a magnetostrictive element is used it is preferably " biased " by a parallel permanent magnet 30 as to prevent frequency doubling.
GB52051/65A 1965-01-06 1965-12-08 Transducer Expired GB1083477A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42368365A 1965-01-06 1965-01-06
US46476965A 1965-06-17 1965-06-17

Publications (1)

Publication Number Publication Date
GB1083477A true GB1083477A (en) 1967-09-13

Family

ID=27026100

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52051/65A Expired GB1083477A (en) 1965-01-06 1965-12-08 Transducer

Country Status (5)

Country Link
US (1) US3535471A (en)
DE (1) DE1462174A1 (en)
ES (1) ES321223A1 (en)
FR (1) FR1461089A (en)
GB (1) GB1083477A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312809A (en) * 1996-05-02 1997-11-05 Nec Corp Piezoelectric acoustic transducer
GB2445597A (en) * 2007-01-09 2008-07-16 William Wood Magnetostrictive compression type loudspeaker with phasing plug

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100228917B1 (en) * 1994-05-20 1999-11-01 쓰스미 시게루 Sound generating device
US6396197B1 (en) * 1995-12-22 2002-05-28 Speaker Acquisition Sub, A Cayman Island Corporation Piezoelectric speaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1802781A (en) * 1927-05-06 1931-04-28 Cleveland Trust Co Piezo-electric device
US1688744A (en) * 1927-05-25 1928-10-23 Wired Radio Inc Multiple acoustic device
US2479987A (en) * 1947-10-11 1949-08-23 Brush Dev Co Multiplate electrotransducer
US3068446A (en) * 1958-08-21 1962-12-11 Stanley L Ehrlich Tubular electrostrictive transducer with spaced electrodes and loading masses
US3215977A (en) * 1960-07-27 1965-11-02 Clevite Corp Acoustic transducer
GB1048602A (en) * 1964-01-30 1966-11-16 Emi Ltd Improvements relating to moving coil loudspeakers and the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312809A (en) * 1996-05-02 1997-11-05 Nec Corp Piezoelectric acoustic transducer
US5856956A (en) * 1996-05-02 1999-01-05 Nec Corporation Piezoelectric acoustic transducer
GB2312809B (en) * 1996-05-02 2000-04-19 Nec Corp Piezoelectric Acoustic Transducer
GB2445597A (en) * 2007-01-09 2008-07-16 William Wood Magnetostrictive compression type loudspeaker with phasing plug

Also Published As

Publication number Publication date
US3535471A (en) 1970-10-20
ES321223A1 (en) 1966-12-16
FR1461089A (en) 1966-12-10
DE1462174A1 (en) 1969-02-06

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