CA1333100C - Dispositif detecteur de signaux d'alarme et avertisseur - Google Patents
Dispositif detecteur de signaux d'alarme et avertisseurInfo
- Publication number
- CA1333100C CA1333100C CA 572607 CA572607A CA1333100C CA 1333100 C CA1333100 C CA 1333100C CA 572607 CA572607 CA 572607 CA 572607 A CA572607 A CA 572607A CA 1333100 C CA1333100 C CA 1333100C
- Authority
- CA
- Canada
- Prior art keywords
- output
- signals
- frequency
- signal
- counter
- 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 - Fee Related
Links
- 238000005070 sampling Methods 0.000 claims description 47
- 230000005236 sound signal Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 4
- 238000012935 Averaging Methods 0.000 abstract description 34
- 238000001514 detection method Methods 0.000 abstract description 17
- 238000009434 installation Methods 0.000 abstract description 2
- 241000269400 Sirenidae Species 0.000 description 9
- 230000036039 immunity Effects 0.000 description 7
- 241000276498 Pollachius virens Species 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241001669696 Butis Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Landscapes
- Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/080,545 US4785474A (en) | 1987-03-25 | 1987-07-31 | Emergency signal warning system |
| US080,545 | 1987-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1333100C true CA1333100C (fr) | 1994-11-15 |
Family
ID=22158077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 572607 Expired - Fee Related CA1333100C (fr) | 1987-07-31 | 1988-07-21 | Dispositif detecteur de signaux d'alarme et avertisseur |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1333100C (fr) |
-
1988
- 1988-07-21 CA CA 572607 patent/CA1333100C/fr not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |