Hyponasal Speech (“Stuffy Nose Voice”): Causes, Evaluation, and Treatment Learn what causes hyponasal speech, how it is evaluated, and the treatment options that can improve speech and breathing. A speech language pathologist identifies underlying airway, nasal, or oral function concerns and creates a personalized care plan for clearer speech and better function. https://breatheworks.com/hyponasal-speech-causes-evaluation-treatment/