FI802425A7 - Switching device for controlling a signal loudspeaker. - Google Patents

Switching device for controlling a signal loudspeaker. Download PDF

Info

Publication number
FI802425A7
FI802425A7 FI802425A FI802425A FI802425A7 FI 802425 A7 FI802425 A7 FI 802425A7 FI 802425 A FI802425 A FI 802425A FI 802425 A FI802425 A FI 802425A FI 802425 A7 FI802425 A7 FI 802425A7
Authority
FI
Finland
Prior art keywords
controlling
switching device
signal loudspeaker
loudspeaker
signal
Prior art date
Application number
FI802425A
Other languages
Finnish (fi)
Swedish (sv)
Inventor
Heinrich Sailer
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of FI802425A7 publication Critical patent/FI802425A7/en

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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • 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)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Circuit For Audible Band Transducer (AREA)
FI802425A 1979-08-02 1980-08-01 Switching device for controlling a signal loudspeaker. FI802425A7 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2931437A DE2931437C2 (en) 1979-08-02 1979-08-02 Circuit arrangement for controlling a signal loudspeaker

Publications (1)

Publication Number Publication Date
FI802425A7 true FI802425A7 (en) 1981-01-01

Family

ID=6077496

Family Applications (1)

Application Number Title Priority Date Filing Date
FI802425A FI802425A7 (en) 1979-08-02 1980-08-01 Switching device for controlling a signal loudspeaker.

Country Status (8)

Country Link
EP (1) EP0023697A1 (en)
DE (1) DE2931437C2 (en)
DK (1) DK332580A (en)
ES (1) ES8104699A1 (en)
FI (1) FI802425A7 (en)
NO (1) NO802295L (en)
PT (1) PT71642B (en)
YU (1) YU191380A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4797932A (en) * 1987-11-23 1989-01-10 Ncr Corporation Speaker volume control apparatus and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466649A (en) * 1966-03-01 1969-09-09 Gen Alarm Corp Multiple alarm system
US3657568A (en) * 1970-01-05 1972-04-18 Hamilton Watch Co Pulse shaping circuit using complementary mos devices
US3686666A (en) * 1970-05-11 1972-08-22 Xerox Corp Interrupted pulsing circuit for audible signaling
US3675133A (en) * 1971-06-21 1972-07-04 Ibm Apparatus and method independently varying the widths of a plurality of pulses
DE2554219A1 (en) * 1975-12-03 1977-06-16 Standard Elektrik Lorenz Ag CIRCUIT ARRANGEMENT FOR AN ACOUSTIC SIGNAL GENERATOR

Also Published As

Publication number Publication date
DE2931437B1 (en) 1980-12-11
NO802295L (en) 1981-02-03
PT71642B (en) 1981-06-26
YU191380A (en) 1983-09-30
DK332580A (en) 1981-02-03
PT71642A (en) 1980-09-01
ES493896A0 (en) 1981-04-01
ES8104699A1 (en) 1981-04-01
EP0023697A1 (en) 1981-02-11
DE2931437C2 (en) 1981-09-24

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Legal Events

Date Code Title Description
FA Application withdrawn [patent]

Owner name: SIEMENS AKTIENGESELLSCHAFT