EP0239914A3 - Système à haut-parleur électronique ayant un son harmonieux avec plusieurs niveaux réglables de son - Google Patents

Système à haut-parleur électronique ayant un son harmonieux avec plusieurs niveaux réglables de son Download PDF

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Publication number
EP0239914A3
EP0239914A3 EP19870104319 EP87104319A EP0239914A3 EP 0239914 A3 EP0239914 A3 EP 0239914A3 EP 19870104319 EP19870104319 EP 19870104319 EP 87104319 A EP87104319 A EP 87104319A EP 0239914 A3 EP0239914 A3 EP 0239914A3
Authority
EP
European Patent Office
Prior art keywords
sound
sound levels
loudspeaker
adjustable sound
multiple adjustable
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.)
Withdrawn
Application number
EP19870104319
Other languages
German (de)
English (en)
Other versions
EP0239914A2 (fr
Inventor
You-Gen Zong
Wei-Guang Qian
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0239914A2 publication Critical patent/EP0239914A2/fr
Publication of EP0239914A3 publication Critical patent/EP0239914A3/fr
Withdrawn legal-status Critical Current

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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)
EP19870104319 1986-03-25 1987-03-24 Système à haut-parleur électronique ayant un son harmonieux avec plusieurs niveaux réglables de son Withdrawn EP0239914A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN86201730 1986-03-25
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 (2)

Publication Number Publication Date
EP0239914A2 EP0239914A2 (fr) 1987-10-07
EP0239914A3 true EP0239914A3 (fr) 1990-10-10

Family

ID=4805428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870104319 Withdrawn EP0239914A3 (fr) 1986-03-25 1987-03-24 Système à haut-parleur électronique ayant un son harmonieux avec plusieurs niveaux réglables de son

Country Status (4)

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

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

Citations (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
US4284845A (en) * 1979-07-30 1981-08-18 Belcher Claude A Pest eliminator
US4290053A (en) * 1978-02-22 1981-09-15 Kuniichi Nemoto Sound effects producer
US4437088A (en) * 1981-11-19 1984-03-13 General Signal Corporation Electrical simulation of percussive bell

Patent Citations (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
US4290053A (en) * 1978-02-22 1981-09-15 Kuniichi Nemoto Sound effects producer
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
EP0239914A2 (fr) 1987-10-07
BR8701340A (pt) 1987-12-29
CN86201730U (zh) 1987-01-21

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