+

WO2003009499A3 - Listening/anti eavesdropping device - Google Patents

Listening/anti eavesdropping device Download PDF

Info

Publication number
WO2003009499A3
WO2003009499A3 PCT/GB2002/003249 GB0203249W WO03009499A3 WO 2003009499 A3 WO2003009499 A3 WO 2003009499A3 GB 0203249 W GB0203249 W GB 0203249W WO 03009499 A3 WO03009499 A3 WO 03009499A3
Authority
WO
WIPO (PCT)
Prior art keywords
vibration
transducer
information
selecting
room
Prior art date
Application number
PCT/GB2002/003249
Other languages
French (fr)
Other versions
WO2003009499A2 (en
Inventor
Martin Christopher Cassey
Graham Bank
Neil Owen
Neil Harris
Martin Colloms
Original Assignee
New Transducers Ltd
Martin Christopher Cassey
Graham Bank
Neil Owen
Neil Harris
Martin Colloms
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 New Transducers Ltd, Martin Christopher Cassey, Graham Bank, Neil Owen, Neil Harris, Martin Colloms filed Critical New Transducers Ltd
Priority to AU2002313529A priority Critical patent/AU2002313529A1/en
Publication of WO2003009499A2 publication Critical patent/WO2003009499A2/en
Publication of WO2003009499A3 publication Critical patent/WO2003009499A3/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B11/00Transmission systems employing sonic, ultrasonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

A method and apparatus for transmitting information from a conversation in a room to a remote listener comprising selecting a structure (101) in the room which is capable of supporting vibration, selecting an electromechanical force transducer (90) which has an intended operative frequency range and comprises a resonant element (84, 86) having a frequency distribution of modes in the operative frequency range, mounting the transducer (90) to the structure (101) using coupling means (68) whereby the transducer excites vibration in the structure, positioning a sensor to detect vibration in the structure (101), determining information from the detected vibration and transmitting said information to a remote listener. There is also provided an anti-eavesdropping system which is the reverse of the method and apparatus according to the first and second aspects of the invention.
PCT/GB2002/003249 2001-07-20 2002-07-16 Listening/anti eavesdropping device WO2003009499A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002313529A AU2002313529A1 (en) 2001-07-20 2002-07-16 Listening/anti eavesdropping device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0117663A GB0117663D0 (en) 2001-07-20 2001-07-20 Listening anti eavesdropping device
GB0117663.5 2001-07-20

Publications (2)

Publication Number Publication Date
WO2003009499A2 WO2003009499A2 (en) 2003-01-30
WO2003009499A3 true WO2003009499A3 (en) 2003-07-31

Family

ID=9918840

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/003249 WO2003009499A2 (en) 2001-07-20 2002-07-16 Listening/anti eavesdropping device

Country Status (3)

Country Link
AU (1) AU2002313529A1 (en)
GB (1) GB0117663D0 (en)
WO (1) WO2003009499A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10328815A1 (en) * 2003-06-21 2005-01-05 Biotronik Meß- und Therapiegeräte GmbH & Co. Ingenieurbüro Berlin Coating system for implants to increase tissue compatibility
KR100901772B1 (en) 2007-10-08 2009-06-11 한국전자통신연구원 Devices to prevent eavesdropping through speakers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593160A (en) * 1984-03-09 1986-06-03 Murata Manufacturing Co., Ltd. Piezoelectric speaker
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO2000035242A2 (en) * 1998-12-09 2000-06-15 New Transducers Limited Bending wave panel-form loudspeaker
US6114684A (en) * 1998-05-19 2000-09-05 Mc Guire; James F. Laser listening device detector
WO2001054450A2 (en) * 2000-01-24 2001-07-26 New Transducers Limited Transducer in particularly for use in acoustic devices

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593160A (en) * 1984-03-09 1986-06-03 Murata Manufacturing Co., Ltd. Piezoelectric speaker
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
US6114684A (en) * 1998-05-19 2000-09-05 Mc Guire; James F. Laser listening device detector
WO2000035242A2 (en) * 1998-12-09 2000-06-15 New Transducers Limited Bending wave panel-form loudspeaker
WO2001054450A2 (en) * 2000-01-24 2001-07-26 New Transducers Limited Transducer in particularly for use in acoustic devices

Also Published As

Publication number Publication date
WO2003009499A2 (en) 2003-01-30
AU2002313529A1 (en) 2003-03-03
GB0117663D0 (en) 2001-09-12

Similar Documents

Publication Publication Date Title
CA2438470A1 (en) System and method for selectively coupling hearing aids to electromagnetic signals
CA2358015A1 (en) Resonant acoustic transmitter apparatus and method for signal transmission
AU2002330640A1 (en) Signal processing device for acoustic transducer array
AU2002322102A1 (en) Systems and methods for sensing an acoustic signal using microelectromechanical systems technology
MY135129A (en) Ultrasonic transducer assembly
ES2174644T3 (en) IMPLANTABLE ACOUSTIC RECEIVER FOR HEARING AID.
AU2002353269A1 (en) Apparatus, systems, and methods for measuring power output of an ultrasound transducer
WO2003098964A3 (en) Transducer
EP1507438A3 (en) Sound reproduction device and portable terminal apparatus
WO1997009856A3 (en) A portable compact disc player
WO2002001915A3 (en) Device and method for calibration of a microphone
AU2001250935A1 (en) Sensor and method for detecting very low frequency acoustic signals
WO2003021286A3 (en) Position location using broadcast television signals and mobile telephone signals
WO2005069860A3 (en) Transducer for converting between mechanical vibration and electrical signal
AU2002237590A1 (en) Voice detection and discrimination apparatus and method
WO2001060530A8 (en) Apparatus having an electroacoustic transducer forming a sound reproducing means and a part of vibration generating means
WO2004010730A3 (en) Ultrasonic transducer for electronic devices
WO2003009499A3 (en) Listening/anti eavesdropping device
AU2002248328A1 (en) Self-aligning ultrasonic sensor system, apparatus and method for detecting surface vibrations
EP0971560A3 (en) Multiple voicecoil and driver transducing
AU1130601A (en) Device and method for detecting opening of passage in bodily cavity
AU2002335872A1 (en) Acoustically generated images having selected components
WO2001003467A3 (en) Bending wave acoustic device
WO2003009219A3 (en) Electronic article comprising loudspeaker & touch pad
AU2001264294A1 (en) Frequency thinning device and method for compressing information by thinning outfrequency components of signal

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP

点击 这是indexloc提供的php浏览器服务,不要输入任何密码和下载