Related Clues:

• Construction-site by-product
• Warning of a sort
• Screamer at a crime scene
• Klaxon
• Clamour
• Security warning
• Fire station signal
• Wail that warns
• Assault on the eardrums
• Siren, for one
• Snap, crackle, or pop
• Some urban pollution
• Music, to a detractor
• Clock radio setting
• More than just startle