Tone table
| Version | Frequency | Repetition rate (sec.) | Special application |
|---|---|---|---|
| Alternate two-tone (Tone 1 sound) | 800-1000 | 0.5 | Fire alarms – Level crossing |
| Alternate two-tone (Tone 2 sound) | 2500-3100 | 0.5 | Security alarms |
| Alternate fast two-tone (Tone 3 sound) | 800-1000 | 0.25 | Increased urgency – Level crossing |
| Alternate fast two-tone (Tone 4 sound) | 2500-3100 | 0.25 | Security deterrent |
| Alternate two-tone (Tone 5 sound) | 440-554 | 0.4/0.1 | AFNOR, France |
| Alternate two-tone (Tone 6 sound) | 430-470 | 1.0 | |
| Alternate very fast two-tone (Tone 7 sound) | 800-1000 | 0.13 | |
| Alternate very fast two-tone (Tone 8 sound) | 2500-3200 | 0.07 | |
| Alternate two-tone (Tone 9 sound) | 440-554 | 2.0 | Turn out, Sweden |
| Continuous note (Tone 10 sound) | 700 | All-clear, Sweden | |
| Continuous note (Tone 11 sound) | 1000 | ||
| Continuous note (Tone 12 sound) | 1000 | ||
| Continuous note (Tone 13 sound) | 2300 | ||
| Continuous note (Tone 14 sound) | 440 | ||
| Interrupted tone (Tone 15 sound) | 1000 | 2.0 | |
| Interrupted tone (Tone 16 sound) | 420 | 1.25 | AS2220, Australia |
| Interrupted tone (Tone 17 sound) | 1000 | 0.5 | |
| Interrupted tone (Tone 18 sound) | 2500 | 0.25 | |
| Interrupted tone (Tone 19 sound) | 2500 | 0.5 | |
| Interrupted tone (Tone 20 sound) | 700 | 6/12 | Pre-vital message, Sweden |
| Interrupted tone (Tone 21 sound) | 1000 | 1.0 | |
| Interrupted tone (Tone 22 sound) | 700 | 4.0 | Air-raid alarm, Sweden |
| Interrupted tone (Tone 23 sound) | 700 | 0.25 | Local warning, Sweden |
| Interrupted tone (Tone 24 sound) | 720 | 0.7/0.3 | Industrial alarm, Germany |
| Interrupted, fast, rising volume (Tone 25 sound) | 1400 | 0.25 | |
| Fast siren (Tone 26 sound) | 250-1200 | 0.085 | |
| Rising constant, fall (Tone 27 sound) | 1000 | 10/40/10 | Industrial alarm, Germany |
| ISO 8201 Evacuation (Tone 28 sound) | 800-1000 | Als Standard | International evacuation alarm |
| Fast whoop (Tone 29 sound) | 500-1000 | 0.15 | |
| Slow whoop (Tone 30 sound) | 500-1200 | 4.5 | Evacuation, The Netherlands |
| Reverse sweep (Tone 31 sound) | 1200-500 | 1.0 | Evacuation, Germany |
| Siren (Tone 32 sound) | 500-1200 | 3.0 |