Table 1: Common phonetic Bulgarian keyboard variants.
| Metric | BDS (expert users) | Phonetic (expert users) | |--------|--------------------|--------------------------| | Avg. WPM | 72 | 58 | | Error rate (uncorrected) | 2.1% | 4.7% | | Backspace frequency per 100 chars | 3.2 | 7.8 | | Pause duration before digraphs (ms) | 80 | 210 (for SH, CH, SHT) | phonetic keyboard bulgarian
No single phonetic layout has been officially standardized by BDS or ISO. 3.1 Positive Transfer from QWERTY Phonetic layouts capitalize on the phonetic similarity principle. For 24 of the 30 Cyrillic letters, a direct auditory match exists with a Latin letter (e.g., А→A, Б→B, Д→D, К→K, О→O, Т→T, Ф→F, etc.). This allows users to leverage existing motor patterns from typing English, significantly reducing initial cognitive load. Table 1: Common phonetic Bulgarian keyboard variants