| Answer | Crossword Clue |
|---|---|
| CLONK | Dull, hollow sound |
| PONG | Hollow sound |
| PONG | Hollow ringing sound. |
| BOOM | Deep hollow sound. |
| PLUNK | Hollow twanging sound |
| BOOM | Deep, hollow sound. |
| PONG | Hollow ringing sound |
| ECHOCHAMBER | Place for hollow sound effects |
| GONG | It produces a vibrant, hollow sound |
| ECHOCHAMBER | Room for creating hollow sound effects |
| PING | Sound made by a hollow celluloid ball. |
