| Answer | Crossword Clue |
|---|---|
| SOFT | Low in volume |
| subsong | unstructured, often rambling vocalization of low volume heard in young birds and, at the start of the breeding season, in adult birds of certain species |
| MURMUR | Low-volume sound |
| MURMURS | Low-volume sounds |
| subsong | a low volume bird song |
| subsongs | SUBSONG, a low volume bird song |
