SE9300597D0 - FREQUENCY SWITCH CONNECTED TO PHONE - Google Patents

FREQUENCY SWITCH CONNECTED TO PHONE

Info

Publication number
SE9300597D0
SE9300597D0 SE9300597A SE9300597A SE9300597D0 SE 9300597 D0 SE9300597 D0 SE 9300597D0 SE 9300597 A SE9300597 A SE 9300597A SE 9300597 A SE9300597 A SE 9300597A SE 9300597 D0 SE9300597 D0 SE 9300597D0
Authority
SE
Sweden
Prior art keywords
acoustic
acoustic signals
loudspeaker
microphone
objects
Prior art date
Application number
SE9300597A
Other languages
Swedish (sv)
Inventor
Carl Tyren
Original Assignee
Dsp Tech Holdings
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 Dsp Tech Holdings filed Critical Dsp Tech Holdings
Priority to SE9300597A priority Critical patent/SE9300597D0/en
Publication of SE9300597D0 publication Critical patent/SE9300597D0/en
Priority to AU61596/94A priority patent/AU6159694A/en
Priority to PCT/SE1994/000141 priority patent/WO1994019778A1/en

Links

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Theoretical Computer Science (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Selective Calling Equipment (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Telephone Function (AREA)

Abstract

Method and device for identifying objects by an acoustic transfer of information, acoustic signals being transferred from a loudspeaker (14) to said object and from said object to a microphone (13). Energy of said acoustic signals from said loudspeaker is affected by a set of acoustic means of said object, different objects having different sets of acoustic means (11) identifying said objects. Said acoustic means are formed as oscillating means oscillating at different frequencies during emission of acoustic signals to said microphone, or as attenuating means. The frequencies of said acoustic signals affected by said acoustic means are recorded and combined to a first code in a control unit (15) operatively connected to said microphone and said loudspeaker, said control unit including recording means for recording said acoustic signals, and processing means for combining said acoustic signals to said first code.
SE9300597A 1993-02-21 1993-02-21 FREQUENCY SWITCH CONNECTED TO PHONE SE9300597D0 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9300597A SE9300597D0 (en) 1993-02-21 1993-02-21 FREQUENCY SWITCH CONNECTED TO PHONE
AU61596/94A AU6159694A (en) 1993-02-21 1994-02-21 Acoustic identification of objects
PCT/SE1994/000141 WO1994019778A1 (en) 1993-02-21 1994-02-21 Acoustic identification of objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9300597A SE9300597D0 (en) 1993-02-21 1993-02-21 FREQUENCY SWITCH CONNECTED TO PHONE

Publications (1)

Publication Number Publication Date
SE9300597D0 true SE9300597D0 (en) 1993-02-21

Family

ID=20388992

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9300597A SE9300597D0 (en) 1993-02-21 1993-02-21 FREQUENCY SWITCH CONNECTED TO PHONE

Country Status (3)

Country Link
AU (1) AU6159694A (en)
SE (1) SE9300597D0 (en)
WO (1) WO1994019778A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925509A1 (en) * 1999-06-04 2000-12-07 Deutsche Telekom Ag Acoustic-mechanical verification transmitter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640835B1 (en) * 1988-12-07 1994-06-24 France Etat AUTHENTICATION DEVICE FOR INTERACTIVE SERVER
DE4042260A1 (en) * 1990-12-31 1992-07-02 Schickedanz Willi Recognition system for coded articles or packages - generates electromagnetic waves at distinct frequencies for excitation of printed resonant circuits reradiating to inductive receiver
WO1992020048A1 (en) * 1991-05-08 1992-11-12 Elysium Aktiebolag Audio information exchange
TW200624B (en) * 1992-04-06 1993-02-21 American Telephone & Telegraph A universal authentication device for use over telephone lines

Also Published As

Publication number Publication date
WO1994019778A1 (en) 1994-09-01
AU6159694A (en) 1994-09-14

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