GB1476125A - Sound communication system - Google Patents

Sound communication system

Info

Publication number
GB1476125A
GB1476125A GB3207774A GB3207774A GB1476125A GB 1476125 A GB1476125 A GB 1476125A GB 3207774 A GB3207774 A GB 3207774A GB 3207774 A GB3207774 A GB 3207774A GB 1476125 A GB1476125 A GB 1476125A
Authority
GB
United Kingdom
Prior art keywords
loud
police
speaker
sounds
sound system
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
GB3207774A
Other languages
English (en)
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
ITT Industries Inc
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 Deutsche ITT Industries GmbH, ITT Industries Inc filed Critical Deutsche ITT Industries GmbH
Publication of GB1476125A publication Critical patent/GB1476125A/en
Expired 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
    • B06B1/0284—Driving circuits for generating signals continuous in time for generating multiple frequencies with consecutive, i.e. sequential generation, e.g. with frequency sweep

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Amplifiers (AREA)
  • Circuits Of Receivers In General (AREA)
GB3207774A 1973-08-02 1974-07-19 Sound communication system Expired GB1476125A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US384889A US3882275A (en) 1973-08-02 1973-08-02 Sound communication system

Publications (1)

Publication Number Publication Date
GB1476125A true GB1476125A (en) 1977-06-10

Family

ID=23519174

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3207774A Expired GB1476125A (en) 1973-08-02 1974-07-19 Sound communication system

Country Status (6)

Country Link
US (1) US3882275A (enrdf_load_stackoverflow)
JP (1) JPS5051288A (enrdf_load_stackoverflow)
CA (1) CA1007989A (enrdf_load_stackoverflow)
DE (1) DE2436693A1 (enrdf_load_stackoverflow)
GB (1) GB1476125A (enrdf_load_stackoverflow)
IT (1) IT1017707B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164523A (en) * 1984-09-15 1986-03-19 Crystalate Electronics Electronic alarm sounder

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065767A (en) * 1976-09-01 1977-12-27 General Signal Corporation Programmable electronic siren
US4206448A (en) * 1977-12-19 1980-06-03 Davis Curtis H Multiple mode sound generator
US4204200A (en) * 1978-10-11 1980-05-20 Traintronics, Inc. Electronic horn arrangement
FR2552913A1 (fr) * 1983-09-29 1985-04-05 Guterman Charles Sirene electronique miniature programmable en sirene ou en parole
JPS60166895U (ja) * 1984-04-11 1985-11-06 パイオニア株式会社 車載用オ−デイオ装置
US4736432A (en) * 1985-12-09 1988-04-05 Motorola Inc. Electronic siren audio notch filter for transmitters
US5317641A (en) * 1991-04-11 1994-05-31 Sony Electronics Inc. Fader depth control apparatus
AUPM282493A0 (en) * 1993-12-06 1994-01-06 Robert Bosch (Australia) Proprietary Ltd. A siren unit
IT238434Y1 (it) * 1997-11-26 2000-11-13 Meta System Spa Sirena elettronica multifunzione per mezzi mobili
US20010026623A1 (en) * 2000-10-17 2001-10-04 Erwin Duane A. Remote Broadcasting System
US20080272649A1 (en) * 2003-10-31 2008-11-06 Johnson Controls Technology Company Electrical connectivity system for use in a vehicle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396422A (en) * 1942-04-30 1946-03-12 Westinghouse Air Brake Co Air raid warning system
US2358630A (en) * 1943-04-21 1944-09-19 Gen Electric Amplification system
US3051944A (en) * 1958-08-25 1962-08-28 Auto Electronics Inc Electronic siren and communication apparatus
US3014199A (en) * 1960-04-11 1961-12-19 Leslie G Dill Siren actuated warning device for automobiles
US3130396A (en) * 1961-09-06 1964-04-21 Hughes Automatic civil emergency warning system
JPS436523Y1 (enrdf_load_stackoverflow) * 1964-12-10 1968-03-23
JPS4312352Y1 (enrdf_load_stackoverflow) * 1965-02-12 1968-05-28
JPS4316007Y1 (enrdf_load_stackoverflow) * 1967-08-16 1968-07-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164523A (en) * 1984-09-15 1986-03-19 Crystalate Electronics Electronic alarm sounder

Also Published As

Publication number Publication date
DE2436693A1 (de) 1975-02-13
CA1007989A (en) 1977-04-05
IT1017707B (it) 1977-08-10
US3882275A (en) 1975-05-06
JPS5051288A (enrdf_load_stackoverflow) 1975-05-08

Similar Documents

Publication Publication Date Title
GB1476125A (en) Sound communication system
GB1399781A (en) Headset
IT1069364B (it) Isieme unitario per innesto a dia framma..e innesto a diaframma che comporta un simile insiemme unitario in particolare per veicolo automobile
JPS51151939A (en) Alarm for vehicle
CA985177A (en) Electronic alarm and emergency voice communication system
FR2227690B1 (enrdf_load_stackoverflow)
ES415909A1 (es) Un proceso para conmutar una via de transmision hacia otra via de transmision en una central de modulacion por impulsoscodificados.
CA988588A (en) Offset oscillator system for radio transmitter and receiver
CA1003758A (en) Volume and tone controls for an audio system
JPS57134717A (en) Remote control system for mobile body
FR2333314A1 (fr) Procede et dispositif d'alimentation d'un haut-parleur de signalisation acoustique
ES453913A1 (es) Perfeccionamientos en circuitos de control automatico de ganacia.
FR2367325A1 (fr) Dispositif d'autocontrole positif de tous ensembles de surveillance acoustique
NL167563B (nl) Overdrachtstelsel voor signaaloverdracht door middel van deltamodulatie, alsmede zender en ontvanger voor een dergelijk stelsel.
FR2309935A1 (fr) Indicateur de l'heure de passage d'un vehicule en un lieu determine
JPS5621497A (en) Wireless earphone system
GB1427029A (en) Radio receiving apparatus
JPS5217702A (en) Data terminal apparatus
JPS5240288A (en) Data highway device
GB1449654A (en) Communication systems
JPS5698999A (en) Electronic wrist watch
FR2308156A1 (fr) Transformateur d'une image definie sous forme de signaux donnes en une image optique
GB904383A (en) Improvements in or relating to two-way communication systems
JPS52154302A (en) Signal sound production system
FR2229981A1 (en) Apparatus for lost person detection - reciever-transmitter actuated by actuated by activator-receiver carried by searcher

Legal Events

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