Bulgarian National Acoustics (NSA)
| President | Secretary | |
|---|---|---|
| Name | Ivan Valtchev | Georgi Koulichev |
| Institution |
Audio Research Laboratory |
G. K. Engineering & Production |
| Adress |
43 Dondukov St. BG-1000 Sofia Bulgaria |
14-16 Tzanko Tzerkovski St. BG-1421 Sofia Bulgaria |
| Tel. |