He tapped a control on the device, and Lorakin heard a momentary burst of static followed by a shrill alert tone.

Behind her, Li was shouting at his men to seal the bridge's environmental systems, even as an alert tone sounded over the intercom.

"I was meditating in my quarters when the alert tone sounded on my viewer."

And I know this because you can also get this Mosquito tone for your cell phone as an alert tone.

The alert tones sound different: longer, less sharp, more dissonant.

This button can only output the alert tone.

An alert tone sounded on her scanner.

Then another alert tone sounded above the rest of the bridge's omnipresent background chatter, and Xav looked up from his station.

Then each relay station would broadcast the alert tone and rebroadcast the emergency message from the primary station.

Common uses for alert tones include general evacuation, severe weather messages, or other alerts.