According to the physical structure of the vocal cords and the vibration characteristics,transducer is proposed to simulate the vocal cold vibration;and according to the study of radiation sound field characteristics,the middle hole of the vocal cord vibration model of diamond is also proposed.Based on the acoustics theory and Reily integration,the model of vocal cord vibration far field sound pressure distribution and the directivity formula are calculated;pressure distribution is calculated by numerical simulation,and the vocal cord model radiation sound field directivity is analyzed. The results show that in the audio frequency range and at the width of the same vocal condition,even on the condition of changing the model of gap width,the vocal fold model radiated far field sound pressure distribution are consistent with the theory.