The present study attempted to investigate the aerodynamic differences between esophageal (SE) and tracheoesophageal (TE) speech of Cantonese. Airflow data was obtained from sustained vowels, and pressure below the pharyngoesophageal (PE) segment was estimated from /ip(h)ip(h)i/ syllables produced by the alaryngeal speakers. Results indicated that SE speech was associated with a lower rate of airflow and a higher pressure below the PE segment than TE speech. Based on the pressure-flow relationship, it is inferred that the estimated neoglottal resistance is greater in SE speakers than in TE speakers. It is speculated that such difference in neoglottal resistance may be related to the use of different air reservoir mechanism between SE and TE speakers.postprintThe 9th Phonetic Conference of China (PCC 2010) and Conference in Evolutionary Linguistics II (CIEL-II), Nankai University, Tianjin, China, 28 May-1 June 2010.第九届中国语音学学术会议、 第二届演化语言学研讨会，中国， 天津，南开大学，2010年5月28日至6月1日
