An analysis of fluctuations of speech wave, i.e., pitch, amplitude, and waveform, is a subject of growing interest for improvement in the quality of synthesized voice. However, little information with respect to the sound source itself in speech production is available, since it is difficult to measure fluid and acoustic motions within the larynx. The purpose of the present study is to clarify ...

Malignant mesenchymal tumors of the larynx constitute 0.3% to 1% of all laryngeal cancers. Of them, osteosarcoma is the rarest. Osteosarcoma of the larynx may be a difficult clinical diagnosis. Pathologic confirmation of osteoid is required for the diagnosis. Treatment is primarily surgical. It is believed that aggressive surgical intervention directed at complete tumor extirpation is the treat...

Chondrosarcoma of the larynx is a rare disease. The condition usually presents as a space-occupying lesion in the larynx. It is usually internal, but an external mass may be noted. Diagnosis demands a deep biopsy as the tumour is submucosal. Treatment is surgical, but the extent of this surgery is dependent upon the stage of the disease. The prognosis, in most cases, is usually very good. The l...