BR8701340A - Sistema de alto-falante eletronico - Google Patents

Sistema de alto-falante eletronico

Info

Publication number
BR8701340A
BR8701340A BR8701340A BR8701340A BR8701340A BR 8701340 A BR8701340 A BR 8701340A BR 8701340 A BR8701340 A BR 8701340A BR 8701340 A BR8701340 A BR 8701340A BR 8701340 A BR8701340 A BR 8701340A
Authority
BR
Brazil
Prior art keywords
speaker system
electronic speaker
electronic
speaker
Prior art date
Application number
BR8701340A
Other languages
English (en)
Portuguese (pt)
Inventor
Zong You-Gen
Qian Wei-Guang
Original Assignee
Zong You Gen
Qian Wei Guang
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 Zong You Gen, Qian Wei Guang filed Critical Zong You Gen
Publication of BR8701340A publication Critical patent/BR8701340A/pt

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
BR8701340A 1986-03-25 1987-03-24 Sistema de alto-falante eletronico BR8701340A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN198686201730U CN86201730U (zh) 1986-03-25 1986-03-25 一种多声级有和声乐感的电子喇叭

Publications (1)

Publication Number Publication Date
BR8701340A true BR8701340A (pt) 1987-12-29

Family

ID=4805428

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8701340A BR8701340A (pt) 1986-03-25 1987-03-24 Sistema de alto-falante eletronico

Country Status (4)

Country Link
EP (1) EP0239914A3 (de)
JP (1) JPS62272700A (de)
CN (1) CN86201730U (de)
BR (1) BR8701340A (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU679145B2 (en) * 1995-09-11 1997-06-19 Sportzwhistle Pty Ltd Electronic whistle
WO1999022549A1 (fr) * 1997-10-23 1999-05-06 Matsushita Electric Industrial Co., Ltd. Systeme d'adressage public
CN104077862A (zh) * 2013-03-29 2014-10-01 北京谊安医疗系统股份有限公司 一种医用报警电路装置和方法
JP2020177154A (ja) * 2019-04-18 2020-10-29 和宏 長南 車両間ならびに／または車両および人間の間のコミュニケーションシステムおよびコミュニケーション方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4183278A (en) * 1977-10-17 1980-01-15 Lectron Products, Inc. Driver circuit for tone generator
JPS54111816A (en) * 1978-02-22 1979-09-01 Kuniichi Nemoto Imitation sound device
US4284845A (en) * 1979-07-30 1981-08-18 Belcher Claude A Pest eliminator
US4437088A (en) * 1981-11-19 1984-03-13 General Signal Corporation Electrical simulation of percussive bell

Also Published As

Publication number Publication date
JPS62272700A (ja) 1987-11-26
EP0239914A3 (de) 1990-10-10
EP0239914A2 (de) 1987-10-07
CN86201730U (zh) 1987-01-21

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