The Voice as a Tool to Detect Recurrence of Laryngeal and Hypopharyngeal Cancer

"The following speech samples will be recorded from the study participants:~* Standardized, phonetically balanced text~* Sustained, modulated production of five vowels~* Picture description~* Diadochokinetic exercise.~Before starting speech recording, the participant fills in a questionnaire consisting of:~* Health barometer~* Self-rating in terms of stress/fatigue/emotional status.~An Ear, Nose and Throat examination incl. transnasal fiberendoscopy is performed at each visit. The investigators will assess the vocal folds/aryepiglottic folds for the presence of paralysis or reduced mobility, as well as the presence of scar/synechia, edema, erythro-/leukoplakia, or a cancer-suspicious lesion/mass in the larynx/hypopharynx or a chondroradionecrosis in the larynx.~Additionally, it will be assessed, if a tracheotomy canula or a nasogastric tube is in place or was used since the last visit.~Furthermore, the investigators will ask the patients to fill out the VHI-30."