Design: Prospective study~Inclusion criteria of the patient group~Patients scheduled for VFSS examination and normal person (without dysphagia) capable of recording voice (selected as a control group for comparison of voice indicators with patients with dysphagia)~Patients who can record voices such as Ah for 5 seconds, Ah. Ah. Ah., umm~~~~Inclusion criteria of the control group: Patients unable to speak, Patients who cannot follow along, If the VFSS test is a retest~Setting: Hospital rehabilitation department~Intervention: After obtaining the consent form for the patient scheduled for the VFSS test, Ah for 5 seconds, after clearing the throat, Ah for 5 seconds, briefly cut with a high-pitched sound, Ah. Ah. Ah, close your lips lightly and make a ummm~~~~ sound, and record 2 times each.
Collection of basic data to develop a technique for monitoring the state of dysphagia using voice analysis.