SE9300597D0 - FREQUENCY SWITCH CONNECTED TO PHONE - Google Patents
FREQUENCY SWITCH CONNECTED TO PHONEInfo
- 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
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.
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)
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)
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 |
-
1993
- 1993-02-21 SE SE9300597A patent/SE9300597D0/en unknown
-
1994
- 1994-02-21 AU AU61596/94A patent/AU6159694A/en not_active Abandoned
- 1994-02-21 WO PCT/SE1994/000141 patent/WO1994019778A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO1994019778A1 (en) | 1994-09-01 |
AU6159694A (en) | 1994-09-14 |
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