AU2003241013A1 - Acoustic alarm having a piezo-electric element driven at multiple frequencies - Google Patents

Acoustic alarm having a piezo-electric element driven at multiple frequencies

Info

Publication number
AU2003241013A1
AU2003241013A1 AU2003241013A AU2003241013A AU2003241013A1 AU 2003241013 A1 AU2003241013 A1 AU 2003241013A1 AU 2003241013 A AU2003241013 A AU 2003241013A AU 2003241013 A AU2003241013 A AU 2003241013A AU 2003241013 A1 AU2003241013 A1 AU 2003241013A1
Authority
AU
Australia
Prior art keywords
piezo
electric element
multiple frequencies
element driven
acoustic alarm
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.)
Abandoned
Application number
AU2003241013A
Inventor
Michael Barson
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.)
Novar Systems Ltd
Original Assignee
Gent 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
Application filed by Gent Ltd filed Critical Gent Ltd
Publication of AU2003241013A1 publication Critical patent/AU2003241013A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • B06B1/0223—Driving circuits for generating signals continuous in time
    • B06B1/0269—Driving circuits for generating signals continuous in time for generating multiple frequencies
    • B06B1/0276—Driving circuits for generating signals continuous in time for generating multiple frequencies with simultaneous generation, e.g. with modulation, harmonics

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
AU2003241013A 2002-05-23 2003-05-23 Acoustic alarm having a piezo-electric element driven at multiple frequencies Abandoned AU2003241013A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0211987.3 2002-05-23
GB0211987A GB2388995B (en) 2002-05-23 2002-05-23 Improvements in and relating to alarms
PCT/GB2003/002268 WO2003099468A1 (en) 2002-05-23 2003-05-23 Acoustic alarm having a piezo-electric element driven at multiple frequencies

Publications (1)

Publication Number Publication Date
AU2003241013A1 true AU2003241013A1 (en) 2003-12-12

Family

ID=9937352

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2003241013A Abandoned AU2003241013A1 (en) 2002-05-23 2003-05-23 Acoustic alarm having a piezo-electric element driven at multiple frequencies

Country Status (5)

Country Link
EP (1) EP1507603B1 (en)
AU (1) AU2003241013A1 (en)
ES (1) ES2527050T3 (en)
GB (1) GB2388995B (en)
WO (1) WO2003099468A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008036321A2 (en) * 2006-09-18 2008-03-27 American Technology Corporation High intensity vehicle proximity acoustics
US9900705B2 (en) 2014-01-23 2018-02-20 Federal Signal Corporation Tone generation
JP6775201B2 (en) * 2017-05-22 2020-10-28 パナソニックＩｐマネジメント株式会社 Alarm sound sound equipment and sound system
US10522008B1 (en) 2018-09-24 2019-12-31 Challenge/Surge Inc. Alarm with piezoelectric element driven repetitively over pseudorandom frequencies
CN109003597B (en) * 2018-09-25 2023-11-03 华润微集成电路(无锡)有限公司 Buzzer driving circuit and corresponding buzzer driving method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890612A (en) * 1973-09-28 1975-06-17 Mallory & Co Inc P R High output audible alarm device utilizing a piezoelectric transducer
US3975650A (en) * 1975-01-30 1976-08-17 Payne Stephen C Ultrasonic generator drive circuit
DE3138068A1 (en) * 1980-11-10 1982-07-08 Marukokeihouki Co. Ltd., Nagano PIEZOELECTRIC MULTI-FREQUENCY SOUND GENERATING DEVICE
JPS57119397A (en) * 1981-01-16 1982-07-24 Canon Kk Sound pressure selector for sound emitting body
JPS57210395A (en) 1981-06-19 1982-12-23 Ricoh Kk Piezo-electric buzzer driving system
JPS6113800A (en) * 1984-06-28 1986-01-22 Murata Mfg Co Ltd Piezoelectric buzzer
KR900003594B1 (en) * 1985-01-07 1990-05-26 니홍덴소 가부시기 가이샤 An alarm
JPH0832111B2 (en) * 1986-10-28 1996-03-27 松下電器産業株式会社 Pronunciation body
FR2619947B1 (en) * 1987-09-02 1989-11-17 Roger Jean Michel FOG HORN FOR AUTOMATIC PHONE SIGNALS
JP3310279B2 (en) * 1990-03-27 2002-08-05 ヤマハ発動機株式会社 Horn
GB2368997B (en) 2000-07-18 2005-05-11 Rafiki Prot Ltd Audible warning devices

Also Published As

Publication number Publication date
WO2003099468A1 (en) 2003-12-04
ES2527050T3 (en) 2015-01-20
EP1507603B1 (en) 2014-12-03
EP1507603A1 (en) 2005-02-23
GB0211987D0 (en) 2002-07-03
GB2388995A (en) 2003-11-26
GB2388995B (en) 2004-06-30

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase