Objective Acoustic Analysis Of Trach-Oesophageal Following â… ,â…¡ Term Voice Rehibilition After Total Laryngectomy

There are various phonation methods in patients who received voice rehabilitation after total laryngectomy. But the effective of thoes methods has been unknown completely. The purpose of this investigation was to objectively evaluate the acoustic quality of tracheo-oesophageal speech following voice rehabilitation after total laryngectomy. Some acoustic parameters about phonation function were obtained in order to found objective data for speech rehabilitation research. 24 patients who had received I -. II term voice rehabilitation after total laryngectomy and 25 age and sex-matched controls were studied. Acoustic sampling of sustained vowel "a" and "i" were measured for fundamental frequency, PPQ, APQ and signal-to-noise ratio. Meanwhile, he maximal phonation time and intensity of the vowel "a" were measured. The main results were 1. There was no statistically significant difference in the mean intensity between two groups. 2. There was a greater maximal phonation time in the tracheo-oesophageal , but compare with nomal voice, the maximal phonation time is lower. For great majority patients, the numer of syllable in a breath reached Igrade, which indicated that patients have ability of communication. 3. The mean fundametal frequency in tracheo-oesophageal speech was lower slightly than in nomal voices, which refect that there is lower pitch in tracheo-oesophageal speech. 4. The mean PPQ,APQ in tracheo-oesophageal speech were higher than in nomal voices, the mean SNR in tracheo-oesophageal speech was lower than in nomal voices. 5. The sonograph showed the voice of tracheo-oesophageal speech is clear and loud. It can be concluded that the more powerful driving pressure in tracheo-oesophageal speech results in an optimized phonatory process in the PE segment. Therefore, the voice of tracheo-oesophageal speech is better option for patients with alaryngeal. It is betived the I -> II term voice rehabilitation after total laryngectomy is recommerded as an effective treatmend for laryngealcarcinoma.