Related Clues:

• Alpine response
• Something repetitive
• Reflection of a kind
• Kind of cardiogram
• Bounce off the walls
• Make a logical connection
• Reminiscent trace
• Radar blip
• Promotional device
• Repeated sound
• Narcissus admirer
• Canyon call
• Sound rebounded
• Many check for it by saying ''Hello!''
• Bounced-back sound