Sirens, horns and Emergency Ringtones. Over 40+ ringtones that are sirens, emergency sounds, horns, or other surprises! Find the loudest one, and use it as your ringtone or just play it to be as annoying and loud as you want. Set the siren as a ringtone, contact, or alarm so you can save it for later. To use, simply tap a scary-button to hear the sound.