| |||
| noise source | |||
| a-f source; signal source | |||
| sound source; ..source of noise; acoustic source | |||
| |||
| reference sound source | |||
|
source sonore : 15 phrases in 5 subjects |
| Communications | 2 |
| Construction | 6 |
| Earth sciences | 2 |
| General | 2 |
| Natural resourses and wildlife conservation | 3 |