Related Clues:

• Serenity spoiler
• Bing, bang or boom
• Crowd noise
• Hush breaker
• Disturbance
• Pollution type
• Like 4-Down
• Click or clack
• Headache intensifier
• Library no-no
• Ear-splitting
• Piercing
• Static, e.g.
• Dissonance
• Far from quiet