From Dialect Gaps to Identity Maps: Tackling Variability in Speaker Verification
This study addresses the significant performance degradation of speaker verification in multidilectal Kurdish (Kurmanji, Sorani, Hawrami). We propose a dual-path framework integrating dialect-specific modeling and cross-dialect joint training. Methodologically, we construct the first annotated speech corpus covering all three major Kurdish dialects; design dialect-aware data augmentation, adversarial dialect-invariant feature learning, and multi-task loss optimization to robustly disentangle speaker identity representations from dialectal variation. Evaluated on cross-dialect test sets using an x-vector–based speaker embedding model, our approach achieves a 38.7% relative reduction in equal error rate (EER) compared to both single-dialect baselines and general multilingual speaker verification systems. This work constitutes the first systematic solution to cross-dialect speaker verification in Kurdish and establishes a novel paradigm for low-resource, multidilectal voice biometrics.