Related Clues:

• Sonic boomerang
• Sonic remnant
• Audio feedback, of a sort
• E-mail button
• Alpine bounceback
• Repeat performance?
• Toyota subcompact
• 1999 Tom Petty album
• Rebounding sound
• Radar return
• Canyon answer
• Doter of Narcissus
• 'Can you hear me? ... hear me? ... hear me?'
• Canyon phenomenon
• Audio feedback of a sort