AU5330990A - Infra-sonic detection system - Google Patents

Infra-sonic detection system

Info

Publication number
AU5330990A
AU5330990A AU53309/90A AU5330990A AU5330990A AU 5330990 A AU5330990 A AU 5330990A AU 53309/90 A AU53309/90 A AU 53309/90A AU 5330990 A AU5330990 A AU 5330990A AU 5330990 A AU5330990 A AU 5330990A
Authority
AU
Australia
Prior art keywords
infra
detection system
sonic detection
sonic
detection
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
AU53309/90A
Inventor
David John Ardener
Hantsaraj Santuram Patel
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.)
ONE PLUS ONE (INTERNATIONAL) Ltd
Original Assignee
ONE PLUS ONE INT 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
Priority claimed from GB898906698A external-priority patent/GB8906698D0/en
Priority claimed from GB8911185A external-priority patent/GB2230609A/en
Application filed by ONE PLUS ONE INT Ltd filed Critical ONE PLUS ONE INT Ltd
Publication of AU5330990A publication Critical patent/AU5330990A/en
Abandoned legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using infrasonic detecting means, e.g. a microphone operating below the audible frequency range
AU53309/90A 1989-03-23 1990-03-22 Infra-sonic detection system Abandoned AU5330990A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB898906698A GB8906698D0 (en) 1989-02-22 1989-03-23 Detection systems
GB8906698 1989-03-23
GB8911185 1989-05-16
GB8911185A GB2230609A (en) 1989-03-23 1989-05-16 "Air pressure change intruder detection systems"

Publications (1)

Publication Number Publication Date
AU5330990A true AU5330990A (en) 1990-10-22

Family

ID=26295127

Family Applications (1)

Application Number Title Priority Date Filing Date
AU53309/90A Abandoned AU5330990A (en) 1989-03-23 1990-03-22 Infra-sonic detection system

Country Status (2)

Country Link
AU (1) AU5330990A (en)
WO (1) WO1990011586A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2900444A1 (en) * 1979-01-08 1980-07-10 Licentia Gmbh METHOD AND CIRCUIT ARRANGEMENT FOR EVALUATING OUTPUT SIGNALS FROM SOUND RECEIVERS OF AN OBJECT PROTECTION MONITORING SYSTEM AND FOR GENERATING AN ALARM SIGNAL
FR2523339A1 (en) * 1982-03-12 1983-09-16 Guglielmetti Vg Electro INFRA-SOUND VOLUMETRIC SENSOR DETECTION DEVICE AND INFRA-SOUND DETECTION METHOD
DE3534277A1 (en) * 1985-02-11 1987-04-02 Fritz Wurm Apparatus and method for the purpose of monitoring rooms and buildings with the aid of infrasound
US4800293A (en) * 1987-04-16 1989-01-24 Miller Robert E Infrasonic switch

Also Published As

Publication number Publication date
WO1990011586A1 (en) 1990-10-04

Similar Documents

Publication Publication Date Title
AU622089B2 (en) Ice detection system
AU6753390A (en) Bioanalytical detection system
AU4379089A (en) Range limiting system
AU8438991A (en) Probe system
AU625828B2 (en) Multiple analysis system
AU6451590A (en) Information processing system
AU3067289A (en) Radon detection system
AU1938988A (en) Proximity detection systems
AU2858089A (en) Function inspecting system
AU5841490A (en) Object recognition system
AU7738891A (en) Substance detection system
AU2789489A (en) Leak detection system
AU2953392A (en) Detection system
GB2229058B (en) Detection system
AU4825790A (en) Detector systems
AU1996092A (en) Seismocardiographic analysis system
AU5855790A (en) Signal processing system
AU632326B2 (en) Detection system
AU3013089A (en) Cannabinoid detection system
GB2220486B (en) Detection system
AU6043990A (en) Electric field detection system
AU4611693A (en) Transponder system
AU5847990A (en) Acoustic-ceiling system
AU610452B2 (en) Line concentration system
EP0405507A3 (en) Displacement detection system