/d/ becoming /b/

/d/ → /b/

The plosive alveolar /d/ becomes a plosive bilabial /b/ when it’s followed by a bilabial sound, such as /p/, /b/ or /m/, because of assimilation. The change only affects the place of articulation, but the manner of articulation (plosive) and the voicing (voiced) remain the same.

 

Therefore,

/d/ (followed by /p/, /b/ or /m/) becomes /b/

sound_loud_speaker It could be better.      ǀ kʊb bi ˈbetə ǀ

sound_loud_speaker You could publish it.      ǀ kʊb ˈpʌblɪʃ ɪt ǀ

sound_loud_speaker She could modify it.      ǀ kʊb ˈmɒdɪfaɪ ɪt ǀ

 

And now some examples from real life:

sound_loud_speaker But, yeah, at that point I thought, “My God, I could be much more charming than Hugh!” (Rupert Everett, BBC4).

sound_loud_speaker And I should be very clear about the argument that I making about the role of veterans in this postwar groundswell (Kathleen Belew, BBC4).

 

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