Conclusion Compared to the normal speaker the tone of esophageal phonation is low-pitched and the voice quality is poorer. But the esophageal phonation is still one important way to acquire the alaryngeal speech. 结论食管发音的声学特性与正常男性相比有显著差别,声音稳定性差、声时短、音调低钝,但食管发音仍是喉全切除术后患者获得发音的一种重要途径。