Related Clues:

• Chamber phenomenon
• Yodeler's feedback
• Alpine reverberation
• Off-the-wall answer
• Back talk?
• Nymph of myth
• Identical response
• Sonic ricochet
• Silo sound
• Return of a sort
• Off-the-wall response
• Feedback, of a sort
• Quick comeback?
• Sound effect
• Sonic boomerang