近年来,雷话的双唇全浊塞音声母/b-/出现了四种变异。当后接韵母为合口呼时,读为圆唇软腭近音[w]或双唇颤音[B];当后接韵母为非合口呼时,仍读为双唇浊塞音[b]、也可读为唇齿鼻音[(?)]。变异的分布、频率与发音人的年龄相关,说明雷话的双唇全浊塞音声母/b-/正在消失,有可能演变为圆唇软腭近音[w]和唇齿鼻音[(?)]。 In recent years, there have been four kinds of variations in the tone of the lips all voiced plug / b- /. When followed by the vowel for the co-mouth call, read as a round lip soft palate near [w] or double lip vibrato [B]; when followed by vowel non-co-huh, still read as both lips voiced plug [b] Read as nasal [/?]]. Variation in distribution, the frequency and the age of the speaker, indicating that the throat of the thunderbolt voiced sound consonant / b- / is disappearing, it may evolve into a round lip soft palate near [w] and lip nasal [(?)] .