GB9003421D0 - Noise detection - Google Patents

Noise detection

Info

Publication number
GB9003421D0
GB9003421D0 GB909003421A GB9003421A GB9003421D0 GB 9003421 D0 GB9003421 D0 GB 9003421D0 GB 909003421 A GB909003421 A GB 909003421A GB 9003421 A GB9003421 A GB 9003421A GB 9003421 D0 GB9003421 D0 GB 9003421D0
Authority
GB
United Kingdom
Prior art keywords
noise detection
noise
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.)
Withdrawn
Application number
GB909003421A
Other versions
GB2241577A (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.)
NNC Ltd
Original Assignee
NNC 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
Application filed by NNC Ltd filed Critical NNC Ltd
Priority to GB9003421A priority Critical patent/GB2241577A/en
Publication of GB9003421D0 publication Critical patent/GB9003421D0/en
Publication of GB2241577A publication Critical patent/GB2241577A/en
Withdrawn legal-status Critical Current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
    • G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
    • G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
GB9003421A 1990-02-15 1990-02-15 Ultrasonic interference detector Withdrawn GB2241577A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9003421A GB2241577A (en) 1990-02-15 1990-02-15 Ultrasonic interference detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9003421A GB2241577A (en) 1990-02-15 1990-02-15 Ultrasonic interference detector

Publications (2)

Publication Number Publication Date
GB9003421D0 true GB9003421D0 (en) 1990-04-11
GB2241577A GB2241577A (en) 1991-09-04

Family

ID=10671044

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9003421A Withdrawn GB2241577A (en) 1990-02-15 1990-02-15 Ultrasonic interference detector

Country Status (1)

Country Link
GB (1) GB2241577A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221201A1 (en) * 2002-05-13 2003-12-24 Henry Arthur Muglia Personal surveillance system and its components

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545247B1 (en) * 1983-04-28 1986-06-06 Frizet Christian DIFFERENTIAL SOUND PRESSURE SENSOR

Also Published As

Publication number Publication date
GB2241577A (en) 1991-09-04

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)