Free Download Top 15 Morning Alarm Ringtones to MP3 | NoteBurner
Freesound - "Emergency Alert System (EAS) Tones/Attention Signals [HIGH QUALITY]" by HVR_EAS
Streamlabs - There are many ways to use royalty-free music & sounds in your content, from alert notifications, to transitions, to BRB/intermission scenes, and more. That's where Streamlabs Sound Library comes in
Star Trek Red Alert Ringtone | Free Ringtones Download | Siren Sounds