Related Clues:

• Yodeler's rejoinder
• A-pealing sound?
• Nymph who loved her own voice
• Oread in love with her own voice
• Return from the Alps?
• Pilot's "E"
• "HELLO! . . . Hello! . . . hello . . ."
• Radio-wave reflection
• Repeat the words of
• Return from a cave?
• You've heard it before?
• You may test for it by saying "Hello!"
• Yodeler's response?
• Sound return?
• It may return your calls