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GB1330750A - Sound generating device - Google Patents

Sound generating device

Info

Publication number
GB1330750A
GB1330750A GB4439971A GB4439971A GB1330750A GB 1330750 A GB1330750 A GB 1330750A GB 4439971 A GB4439971 A GB 4439971A GB 4439971 A GB4439971 A GB 4439971A GB 1330750 A GB1330750 A GB 1330750A
Authority
GB
United Kingdom
Prior art keywords
node
diaphragm
circles
circle
concentric
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
GB4439971A
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.)
Nittan Co Ltd
Original Assignee
Nittan Co 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
Priority claimed from JP9693570U external-priority patent/JPS5417377Y1/ja
Priority claimed from JP45093944A external-priority patent/JPS5035794B1/ja
Application filed by Nittan Co Ltd filed Critical Nittan Co Ltd
Publication of GB1330750A publication Critical patent/GB1330750A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

1330750 Piezoelectric devices; resonators NITTAN CO Ltd 23 Sept 1971 [1 Oct 1970 (3) 27 Oct 1970] 44399/71 Headings H4J and H4X A sound generator comprises a piezoelectric element 3 (Fig. 1) attached to the centre of a circular diaphragm 2 and arranged to be energized at a fixed frequency to produce a node circle of vibration 11 on the diaphragm 2. The diaphragm 2 is constrained beyond element 3 only at the node circle by one end of a resonance chamber 5 of right circular cylindrical form concentric with the node circle. Chamber 5 has an inside diameter essentially equal to the diameter of the node circle and is closed at the other end or has a reflector plate 8 (Fig. 5) facing but spaced from such other end. Cavity 51 is resonant at the operating frequency. Alternatively the diaphragm is energized to produce predetermined node circles 11, 12 (Fig. 3) and is constrained beyond element 3 only at one of the node circles by the end of one of a plurality of right circular cylinders having a common end closure plate. The cylinders are concentric with the node circles and have inside diameters essentially equal to the diameters of the node circles respectively. Three node circles (11, 12, 13), Fig. 4 (not shown), may be generated to correspond with three concentric right circular cylinders. The diaphragm 2 may be of metal and form one electrode of the piezoelectric element 3 or it may be made of synthetic resin. The diaphragm 2 is spaced from the cavity 51 by a number of projections 4.
GB4439971A 1970-10-01 1971-09-23 Sound generating device Expired GB1330750A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP9693470 1970-10-01
JP9693670 1970-10-01
JP9693570U JPS5417377Y1 (en) 1970-10-01 1970-10-01
JP45093944A JPS5035794B1 (en) 1970-10-27 1970-10-27

Publications (1)

Publication Number Publication Date
GB1330750A true GB1330750A (en) 1973-09-19

Family

ID=27468161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4439971A Expired GB1330750A (en) 1970-10-01 1971-09-23 Sound generating device

Country Status (5)

Country Link
US (1) US3761956A (en)
CA (1) CA928997A (en)
DE (1) DE2148704C3 (en)
FR (1) FR2109894A5 (en)
GB (1) GB1330750A (en)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1402290A (en) * 1971-12-29 1975-08-06 Sumitomo Electric Industries Piezo-electric acoustic device
GB1370164A (en) * 1972-01-30 1974-10-16 Mullard Ltd Piezoelectric transducer
US4172253A (en) * 1972-04-19 1979-10-23 Hermans Albert L Controlled wave pattern ultrasonic burglar alarm
JPS4963860U (en) * 1972-06-26 1974-06-04
US3872470A (en) * 1973-04-18 1975-03-18 Airco Inc Audible signal generating apparatus having selectively controlled audible output
US3873866A (en) * 1973-11-05 1975-03-25 Sontrix Piezoelectric transducer assembly and method for generating an umbrella shaped radiation pattern
US3921016A (en) * 1973-12-12 1975-11-18 Proctor & Assoc Co Sonic signal generator and housing
US3890513A (en) * 1974-02-14 1975-06-17 Systron Donner Corp Acoustic transducer
US4228379A (en) * 1978-08-28 1980-10-14 American District Telegraph Company Diaphragm type piezoelectric electroacoustic transducer
US4430529A (en) 1980-12-24 1984-02-07 Murata Manufacturing Co., Ltd. Piezoelectric loudspeaker
DE3135096A1 (en) * 1981-02-20 1982-09-09 Apparatebau Wilhelm Heibl Gmbh, 8671 Selbitz Sound generator (source) having a piezoelectric transducer
US4429247A (en) 1982-01-28 1984-01-31 Amp Incorporated Piezoelectric transducer supporting and contacting means
DE3232177A1 (en) * 1982-08-30 1984-03-01 Siemens AG, 1000 Berlin und 8000 München PIEZOELECTRIC CONVERTER
JPS60190100A (en) * 1984-03-09 1985-09-27 Murata Mfg Co Ltd Piezoelectric speaker
FR2583115B1 (en) * 1985-06-10 1989-03-10 Centre Techn Ind Mecanique ELECTROFLUIDIC TRANSDUCER OF THE NOZZLE / PALLET TYPE AND HYDRAULIC SERVOVALVE EQUIPPED WITH SUCH A TRANSDUCER
GB2234110B (en) * 1989-05-31 1993-04-21 Seikosha Kk Piezo-electric transducer
US5070319A (en) * 1990-06-22 1991-12-03 Ranco Incorporated Of Delaware Door ajar alarm for refrigeration unit
US5063372A (en) * 1990-06-22 1991-11-05 Ranco Incorporated Of Delaware Door ajar alarm for refrigeration unit
US5317305A (en) * 1992-01-30 1994-05-31 Campman James P Personal alarm device with vibrating accelerometer motion detector and planar piezoelectric hi-level sound generator
US5363452A (en) * 1992-05-19 1994-11-08 Shure Brothers, Inc. Microphone for use in a vibrating environment
JP3324593B2 (en) * 1999-10-28 2002-09-17 株式会社村田製作所 Ultrasonic vibration device
US7386137B2 (en) 2004-12-15 2008-06-10 Multi Service Corporation Sound transducer for solid surfaces
US20060126885A1 (en) * 2004-12-15 2006-06-15 Christopher Combest Sound transducer for solid surfaces
AU2016322836B2 (en) 2015-09-14 2021-07-29 Wing Acoustics Limited Improvements in or relating to audio transducers
US11166100B2 (en) 2017-03-15 2021-11-02 Wing Acoustics Limited Bass optimization for audio systems and devices
WO2018172944A1 (en) 2017-03-22 2018-09-27 Wing Acoustics Limited Systems methods and devices relating to hinges and audio transducers

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967957A (en) * 1957-09-17 1961-01-10 Massa Frank Electroacoustic transducer
US3166730A (en) * 1959-09-29 1965-01-19 Jr James R Brown Annular electrostrictive transducer
US3271596A (en) * 1963-11-12 1966-09-06 Boeing Co Electromechanical transducers
US3331970A (en) * 1964-09-29 1967-07-18 Honeywell Inc Sonic transducer
US3518460A (en) * 1968-10-30 1970-06-30 Euphonics Corp Ultrasonic transducer employing suspended piezoelectric plate
US3578995A (en) * 1969-09-22 1971-05-18 Dynamics Corp Massa Div Electroacoustic transducers of the bilaminar flexural vibrating type
US3638052A (en) * 1969-09-22 1972-01-25 Dynamics Corp America Electroacoustic transducers of the bilaminar flexural vibrating type

Also Published As

Publication number Publication date
AU3362471A (en) 1973-03-22
DE2148704A1 (en) 1972-04-06
DE2148704C3 (en) 1974-04-04
US3761956A (en) 1973-09-25
DE2148704B2 (en) 1973-09-13
CA928997A (en) 1973-06-26
FR2109894A5 (en) 1972-05-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee