Two principally different assessment speech intelligibility methods may be applied: subjective assessment (93.5% patients are satisfied voice), objective assessment with a Sound Level Meter (before and after surgery, voice function is the same). Conclusion: Glottic reconstruction after frontolateral partial laryngectomy with sternohyoid muscle flap is the effective method treatment; it preserves the function of the larynx and helps the patients integrating back into the community.