| |||
| acoustic signal; sound signal | |||
| bell (signal) | |||
| audio prompt (An audio cue to the user to begin recording audio data) | |||
| audible alarm | |||
| audio signal; aural signal | |||
|
Tonsignal : 14 phrases in 4 subjects |
| Communications | 8 |
| Electronics | 3 |
| Information technology | 2 |
| Telecommunications | 1 |