This sound plays when a Watch or Warning is issued for your area by the National Weather Service.
*EAS Alert examples:
Tornado Watch/Warning
Severe Thunderstorm Watch/Warning
Special Marine Warning
Flash Flood Warning
These example alerts do play that EAS sound whenever one of them is issued for your area.
Audio and App Credits belong to ACME AtronOmatic.
Audio ripped from Android Application.
You can use this for your own EAS Scenarios or whatever.