关键词: 声调, 言语特征, 言语识别

Abstract: Under the new situation of both China's rapid economic and social development， as well as with the fight against illegal and criminal activities， speech identification plays an increasingly prominent role in the whole investigation proceedings. In this paper， the Chinese tone characteristics are briefly introduced， and the value of tones in speech identification are explored from two aspects. Firstly， there are significant differences in tone in Chinese dialects. Secondly， through the promotion of mandarin and the investigation of Chinese acquisition of minorities and foreigners， it is found that the characteristics of Chinese Tone are quite stable.

Key words: tone, characteristics of speech, speech identification