Related Clues:
- Acoustical engineer's concern
- Radar-screen dot
- Nymph spurned by Narcissus
- It will return your calls
- Sonic rebound
- Say the same thing as
- Dolphin's navigation aid
- Toyota sedan
- Nymph who pined away
- Water well feature
- Aircraft representation, at times
- Empty hallway sound
- Canyon sound effect
- Unoriginal response
- Sound for a spelunker