Related Clues:

• Shouts loudly
• Tries to be heard in a noisy room
• TYPES IN ALL CAPS, online
• Competes with the cacophony
• Cries for help, say
• Talks over loud music
• Doesn't use one's indoor voice
• 'Gimme a C ...!' and 'Go team!'
• Cheerleaders' assortment
• TALKS LIKE THIS
• Emulates some fans