| Answer | Crossword Clue |
|---|---|
| NOISE | Unwanted sound |
| HUM | Unwanted speaker sound |
| PING | Unwanted engine sound |
| KNOCK | Unwanted engine sound |
| dub | to omit or erase (unwanted sound) on a tape or sound track |
| background | Unwanted signals, such as noise in the reception or recording of sound |
| backgrounds | Unwanted signals, such as noise in the reception or recording of sound |
| filtering | Pass (a liquid, gas, light, or sound) through a device to remove unwanted material |
| filtered | Pass (a liquid, gas, light, or sound) through a device to remove unwanted material |
