DE69923203D1 - SOUND SYSTEM - Google Patents
SOUND SYSTEMInfo
- Publication number
- DE69923203D1 DE69923203D1 DE69923203T DE69923203T DE69923203D1 DE 69923203 D1 DE69923203 D1 DE 69923203D1 DE 69923203 T DE69923203 T DE 69923203T DE 69923203 T DE69923203 T DE 69923203T DE 69923203 D1 DE69923203 D1 DE 69923203D1
- Authority
- DE
- Germany
- Prior art keywords
- sounders
- pulse
- played
- control unit
- messages
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Fire Alarms (AREA)
- Alarm Systems (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Prepayment Telephone Systems (AREA)
- Meter Arrangements (AREA)
- Massaging Devices (AREA)
Abstract
A public address apparatus comprises a number of sounders each provided with storage means in order to store a number of pre-recorded messages. A central control unit is also provided arranged to send control signals to each of the sounders, the control signals comprising an initial synchronisation and calibration pulse, followed by a second pulse of variable duration. The duration of the second pulse is used to indicate which of the pre-recorded messages to be played in response to at least one detector which provides an input to the central control unit. The arrangement has the advantage that synchronisation of the messages played by each of the sounders can be ensured.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9820644 | 1998-09-22 | ||
GBGB9820644.4A GB9820644D0 (en) | 1998-09-22 | 1998-09-22 | Public address apparatus |
PCT/GB1999/003141 WO2000018188A2 (en) | 1998-09-22 | 1999-09-21 | Public address apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69923203D1 true DE69923203D1 (en) | 2005-02-17 |
DE69923203T2 DE69923203T2 (en) | 2005-12-29 |
Family
ID=10839280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69923203T Expired - Lifetime DE69923203T2 (en) | 1998-09-22 | 1999-09-21 | SOUND SYSTEM |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1123637B1 (en) |
JP (1) | JP2002526007A (en) |
AT (1) | ATE287193T1 (en) |
AU (1) | AU6211299A (en) |
DE (1) | DE69923203T2 (en) |
GB (1) | GB9820644D0 (en) |
WO (1) | WO2000018188A2 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3858195A (en) * | 1973-08-28 | 1974-12-31 | Jab Co Inc | Audio alarm system |
DE2533330C3 (en) * | 1975-07-25 | 1981-08-13 | Siemens AG, 1000 Berlin und 8000 München | Method and device for the transmission of measured values in a fire alarm system |
ATE30646T1 (en) * | 1983-10-17 | 1987-11-15 | Cerberus Ag | METHOD OF ALARM SIGNALING AND EQUIPMENT FOR APPLYING THE SAME. |
US5887067A (en) * | 1996-05-10 | 1999-03-23 | General Signal Corporation | Audio communication system for a life safety network |
-
1998
- 1998-09-22 GB GBGB9820644.4A patent/GB9820644D0/en not_active Ceased
-
1999
- 1999-09-21 DE DE69923203T patent/DE69923203T2/en not_active Expired - Lifetime
- 1999-09-21 EP EP99949117A patent/EP1123637B1/en not_active Expired - Lifetime
- 1999-09-21 WO PCT/GB1999/003141 patent/WO2000018188A2/en active IP Right Grant
- 1999-09-21 AT AT99949117T patent/ATE287193T1/en not_active IP Right Cessation
- 1999-09-21 JP JP2000571715A patent/JP2002526007A/en active Pending
- 1999-09-21 AU AU62112/99A patent/AU6211299A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP1123637B1 (en) | 2005-01-12 |
WO2000018188A2 (en) | 2000-03-30 |
EP1123637A2 (en) | 2001-08-16 |
WO2000018188A3 (en) | 2000-06-08 |
ATE287193T1 (en) | 2005-01-15 |
GB9820644D0 (en) | 1998-11-18 |
JP2002526007A (en) | 2002-08-13 |
DE69923203T2 (en) | 2005-12-29 |
AU6211299A (en) | 2000-04-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |