FR2545247B1 - DIFFERENTIAL SOUND PRESSURE SENSOR - Google Patents

DIFFERENTIAL SOUND PRESSURE SENSOR

Info

Publication number
FR2545247B1
FR2545247B1 FR8307283A FR8307283A FR2545247B1 FR 2545247 B1 FR2545247 B1 FR 2545247B1 FR 8307283 A FR8307283 A FR 8307283A FR 8307283 A FR8307283 A FR 8307283A FR 2545247 B1 FR2545247 B1 FR 2545247B1
Authority
FR
France
Prior art keywords
pressure sensor
sound pressure
differential sound
differential
sensor
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
FR8307283A
Other languages
French (fr)
Other versions
FR2545247A1 (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.)
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
Priority to FR8307283A priority Critical patent/FR2545247B1/en
Priority to EP84400782A priority patent/EP0127493A1/en
Priority to ES531947A priority patent/ES8501909A1/en
Publication of FR2545247A1 publication Critical patent/FR2545247A1/en
Application granted granted Critical
Publication of FR2545247B1 publication Critical patent/FR2545247B1/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00Burglar, theft or intruder alarms
    • G08B13/16Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1681Actuation 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
FR8307283A 1983-04-28 1983-04-28 DIFFERENTIAL SOUND PRESSURE SENSOR Expired FR2545247B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8307283A FR2545247B1 (en) 1983-04-28 1983-04-28 DIFFERENTIAL SOUND PRESSURE SENSOR
EP84400782A EP0127493A1 (en) 1983-04-28 1984-04-19 Acoustical pressure differential detector
ES531947A ES8501909A1 (en) 1983-04-28 1984-04-26 Acoustical pressure differential detector.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8307283A FR2545247B1 (en) 1983-04-28 1983-04-28 DIFFERENTIAL SOUND PRESSURE SENSOR

Publications (2)

Publication Number Publication Date
FR2545247A1 FR2545247A1 (en) 1984-11-02
FR2545247B1 true FR2545247B1 (en) 1986-06-06

Family

ID=9288482

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8307283A Expired FR2545247B1 (en) 1983-04-28 1983-04-28 DIFFERENTIAL SOUND PRESSURE SENSOR

Country Status (3)

Country Link
EP (1) EP0127493A1 (en)
ES (1) ES8501909A1 (en)
FR (1) FR2545247B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2588108A1 (en) * 1985-09-27 1987-04-03 Durand Michel Active perimeter break-in detector
GB8925308D0 (en) * 1989-11-09 1989-12-28 Taylor Michael R Sound detection devices and systems
GB2241577A (en) * 1990-02-15 1991-09-04 Nnc Ltd Ultrasonic interference detector
FR2735600A1 (en) * 1995-06-13 1996-12-20 Ponce Max Infra-sound anti-theft and anti-intruder protection system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1415498A (en) * 1972-01-20 1975-11-26 Securitas Alarm Ltd Alarm system
GB1573618A (en) * 1976-03-16 1980-08-28 Elliott Brothers London Ltd Intruder alarm systems
DE2852664C2 (en) * 1978-12-06 1982-08-19 Cerberus AG, 8708 Männedorf, Zürich Procedure and arrangement for intrusion detection
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

Also Published As

Publication number Publication date
EP0127493A1 (en) 1984-12-05
ES531947A0 (en) 1984-12-16
ES8501909A1 (en) 1984-12-16
FR2545247A1 (en) 1984-11-02

Similar Documents

Publication Publication Date Title
BR8407212A (en) PRESSURE TRANSDUCER
FR2571855B1 (en) ABSOLUTE PRESSURE TRANSDUCER
BR8207904A (en) SILICIO-GLASS-SILICON CAPACITIVE PRESSURE TRANSDUCER
BR8207848A (en) PERFECT CAPACITIVE PRESSURE SENSOR
DK461784D0 (en) PRESSURE SENSOR
FR2559899B1 (en) CAPACITIVE PRESSURE SENSOR
FR2587485B1 (en) PRESSURE SENSOR
FR2555743B1 (en) INDUCTIVE DIFFERENTIAL PRESSURE SENSOR
FR2624270B1 (en) PRESSURE TRANSDUCER
DE3168427D1 (en) FLUERIC PARTIAL PRESSURE SENSOR
DE3483641D1 (en) COMBUSTION PRESSURE SENSOR.
BE893875A (en) DIFFERENTIAL PRESSURE SENSOR
BR8803885A (en) PRESSURE SENSOR
FR2566529B1 (en) PRESSURE SENSOR
GB2091883B (en) Differential pressure transducer
FI810808L (en) pressure sensor
AT383895B (en) PRESSURE SENSOR
FR2545247B1 (en) DIFFERENTIAL SOUND PRESSURE SENSOR
FR2555700B1 (en) PRESSURE VALVE
AR229045A1 (en) ELECTROACOUSTIC TRANSDUCER ARRANGEMENT
AR226002A1 (en) ELECTROACOUSTIC TRANSDUCER ARRANGEMENT
FR2544522B1 (en) PRESSURE REPORT SENSOR
BE892771A (en) PRESSURE SENSOR
AT381169B (en) PRESSURE SENSOR
DK547882A (en) PRESSURE SENSOR

Legal Events

Date Code Title Description
ST Notification of lapse
AR Application made for restoration
BR Restoration of rights
ST Notification of lapse