Related Clues:

• Bit of urban noise
• Toot one's horn
• Roadrunner's cry
• Beetle's sound?
• Jaywalker alert
• Loud noise
• Electronic noise
• Palindromic sound effect
• Noisemaker noise
• Loud sound
• A message may be left after it
• Baa
• Strident noise
• Sound of trumpets
• Brassy blast